INTERSTATE STANDARD

HACKSAW BLADES

FOR METAL

TECHNICAL CONDITIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

INTERSTATE STANDARD

HACKSAW BLADES FOR METAL

Specifications

Saw blades for metal cutting.

MKS 25.100.40 OKP 39 2540

Date of introduction 01.07.87

This standard applies to manual and machine hacksaw blades for metal (hereinafter referred to as blades).

The requirements of this standard in terms of Sec. 1, 2, 4, 5 and 3.2 are mandatory, other requirements are recommended.

1. TYPES AND BASIC DIMENSIONS

1.1. Cloths should be made of types:

1 - manual; 2 - machine; executions:

A - with the location of the teeth on one side of the blade;

B - with the location of the teeth on both sides of the blade.

Cloths of type 2 are produced only in execution A.

Official edition

1.2. The dimensions of the canvases must correspond to those indicated in Fig. 1, 2 and in table. 12.

Reprint prohibited

Editor L.V., Koretnikova Technical editor O.N. Vlasova Proofreader V. S. Chernaya Computer proofing by S. V. Ryabova

Ed. persons. No. 02354 dated 07/14/2000. Handed over to the set 09/30/2004. Signed for publication on October 25, 2004. Conditions.print.l. 1.40. Uch.-ed.l. 0.85.

Circulation 95 copies. From 4338. Law. 858.

IPK Standards Publishing House, 107076 Moscow, Kolodezny per., 14. http://www.standards.ru e-mail: [email protected] s.ru

Typed at the Publishing House on a PC Printed at the branch of the IPK Publishing House of Standards - type. Moscow Printer, 105062 Moscow, Lyalin per., 6.

Plr No. 080102

Table 1

Designation	employment

Continuation of the table. one

Designation	employment

* The sizes of cloths correspond to ISO 2336-80 (see appendix 2).

Note. It is allowed, in agreement with the consumer, to manufacture fabrics with a length of 1\350 and 400 mm with a diameter of mounting holes d = 10.2 mm.

An example of a symbol for a web of execution A, dimensions /[ = 400 mm, s = 1.60 mm, P = 4.00 mm, b = 32 mm:

* It is allowed to produce canvases with mounting holes with a diameter of 6 mm and a width of 25 mm.

table 2

Designation	Applicability

An example of a conditional P = 1.00 mm:

web designations with dimensions s = 0.63 mm,

(Changed edition, Rev. No. 1, 2, 3).

1.3. The geometric parameters of the canvases are indicated in Appendix 1.

2. TECHNICAL REQUIREMENTS

2.1. Cloths must be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.2. Fabrics must be made:

type 1 - from steel tape according to GOST 23522, from high-speed steel according to GOST 19265, from steel grade X6VF according to GOST 5950. It is allowed, in agreement with the consumer, to manufacture from V2F grade steel in accordance with GOST 5950;

type 2 - from high-speed steel according to GOST 19265. It is allowed to manufacture from other grades of high-speed steel, which ensure the durability of blades not lower than those made from steel according to GOST 19265.

Option 2

2.3. Cloths must be thermally processed in accordance with the instructions on the devil. 3 and in table. 3.

Table 3

Heat treatment zone	Canvas type	Hardness	steel grade
Heat treatment zone	Canvas type		steel grade
1 - increased			fast cutting, instrumental
hardness			fast cutting
2 - reduced hardness			fast cutting
			instrumental
			fast cutting

2.4. On the surfaces of the canvases there should be no cracks, captivity, scale and corrosion. Defects are allowed, the depth or height of which does not exceed the norms established for a tape in accordance with GOST 23522 or a sheet according to specifications.

2.5. Hacksaw blades must have one of the following coatings: NTs-25 enamel according to GOST 5406, NTs-132 according to GOST 6631, Khim.Oks.prm. and other coatings that ensure the safety and appearance of the surface.

2.6. The blades must have a tooth setting:

for type 1:

along the canvas (Fig. 4);

along two adjacent teeth through one undivided one (Fig. 5); for type 2:

for each tooth or through the tooth;

along two adjacent ones through one undivided one (Fig. 5).

2.7. The web layout should be on the entire length of the web or end at a distance of (35 + 5) mm for type 2 webs and 30 mm for type 1 webs from the end.

The value of the tooth setting should be 1.25-1.8 of the blade thickness for blades with a blade set; the wiring pitch should be equal to 8P, but not more than 8 mm.

For blades with a tooth set, the value of the tooth set per side should not exceed 0.15-0.25 of the blade thickness.

length 1\...........

hole diameter d. width for type:

1 at b: 12.5 mm. .

2 at 1\\ up to 400 mm

St. 400 mm tooth pitch for type:

2.8. Limit deviations of web dimensions, mm:

±0.45P per 10 mm length

2.9. The tolerance of the symmetry of the axes of the holes relative to the axis of symmetry of the width of the blade for blades of type 1-1 mm, for blades of type 2-1.4 mm.

2.10. The straightness tolerance of the sides of the web in the free state in the longitudinal direction per 100 mm of length is 0.5 mm for type 1 and 0.3 mm for type 2.

2.11. The straightness tolerance of the sides in the transverse direction over the entire width of the unset part of the blade of type 1 should not exceed for blades with a set on the blade - half the difference between the amount of the set and the thickness of the blade, measured on the unset part, for the blades with a set on the tooth - the value of the tooth set on the side .

The straightness tolerance in the transverse direction over the entire width of the unset part of the type 2 blade should not exceed 0.8 of the value of the tooth setting per side.

2.12. The height difference between the tops of adjacent blade teeth should not exceed: 0.1 mm for blades with a tooth pitch of up to 1.4 mm; 0.15 mm for blades with a tooth pitch of St. 1.4 mm.

Allowed by agreement with the consumer for blades of type 1 with a tooth pitch of more than 1 mm, the difference in height of adjacent teeth is 0.15 mm.

2.4-2.12. (Revised edition, Rev. No. 1).

2.13. Tolerance of straightness of the line of the tops of the teeth of the blade, mm:

for cloths of type 1 execution A - 1.4;

for other canvases:

at 1\ to 350 mm - 1.0;

at 1\ St. 350 to 600 mm - 1.5;

at 1\ St. 600 mm - 2.5.

(Revised edition, Rev. No. 2).

2.14. Limit deviations of the thickness of the hacksaw blade must: correspond to the maximum deviation of the source material - according to the upper deviation; according to the lower deviation - do not exceed the maximum deviation of the source material for

type 1 blades - by 0.05 mm, for type 2 blades - by 0.1 mm.

(Revised edition, Rev. No. 1).

2.15. The average and 95 percent period of resistance under the test conditions specified in Sec. 4, must be at least, min:

for type 1 sheets:

98 and 42 - high speed steel;

60 and 24 - from tool alloy steel;

123 and 64 - for type 2 blades.

Note. For a tool made from high-speed steel grades with a content of alloying elements less than in R6M5 grade steel, the correction factor for the average and specified period of resistance is 0.8.

2.16. The criterion for blunting blades is the loss of productivity, expressed by the time of cutting the workpiece according to the sections indicated in Table. 4, which should not exceed, min:

for type 1 HSS blades:

with tooth pitch 0.8 - 1.4 mm ..................................1.4

with a tooth pitch of 1.6 mm .............................. 4.0

with a tooth pitch of 0.8 - 1.4 mm .............................. 1.6

with a tooth pitch of 1.6 mm .............................. 5.0

for type 2 blades.......................................5.25

2.17. On each canvas must be clearly marked: the trademark of the manufacturer;

canvas width; blade tooth pitch;

steel grade (steel grade 11RZAMEF2 is not marked).

(Changed edition, Rev. No. 1, 2).

2.18. (Deleted, Rev. No. 2).

2.19. The remaining requirements for packaging, labeling of transport and consumer containers are in accordance with GOST 18088.

3. ACCEPTANCE

(Revised edition, Rev. No. 2).

3.2. Testing of canvases for the average durability period should be carried out once every three years on at least 5 canvases, for a 95% durability period - once a year on at least 5 canvases.

Blade tests should be carried out on one size of each type of blade.

(Changed edition, Rev. No. 1, 2).

4. CONTROL METHODS

4.1. Appearance control is carried out visually.

4.2. When controlling the parameters of canvases, methods and means of control should be used, the error of which should be no more than:

4.5. Type 1 blades are tested for tooth sharpness and elasticity before durability tests:

the sharpness of the teeth of the blades must ensure adhesion to the control insert with a hardness of 56 HRC 3 .

The elasticity of the sheets is tested by bending the sheets in both directions around a cylinder with a diameter of 250 mm. After testing, the sheets should not have cracks and residual deformations that go beyond the limit deviations specified in clause 2.10.

4.1-4.5. (Revised edition, Rev. No. 1).

4.6. Testing of blades for performance, the average and 95% periods of durability should be carried out on hacksaws that meet the standards of accuracy and rigidity established for them, on samples of steel grade 45 according to GOST 1050, hardness 180. . . 190 HB.

4.7. Testing of canvases should be carried out in the modes indicated in Table. four.

Table 4

Pitch P, mm	Number of double strokes at 150 mm stroke	Blade force on the cut sample, N (kgf)	Sample cross section, mm

* Static force when the sample being cut is located at the middle of the length of the test web section and the crank pin at the top of the disk.

** With connecting rod and hydraulic drive disengaged.

*** It is allowed to carry out tests on samples with a cross section of 12x12 mm. In this case, performance tests are carried out with seven cuts. The time of the seventh cut is equal to the product of the correction factor 1.65 and the time of the tenth cut when testing a sample with a cross section of 10 x 10 mm.

The correction factor for the blunting criterion is 1.65.

Note. During the reverse stroke, the force on the canvas is not removed.

4.6-4.7. (Changed edition, Rev. No. 1, 2).

4.8. When testing cloths of type 2, a 5% (by mass) solution of emulsol in water with a flow rate of 6-8 l / min should be used as a cutting fluid.

4.9. Testing of cloths for operability should be carried out with ten cuts, while the time of the last cut should not exceed, min:

for door leaves type 1

from high speed steel:

0.7 - with a tooth pitch of 0.8-1.4 mm;

2.0 - with a tooth pitch of 1.6 mm;

from tool alloy steel:

0.8 - with a tooth pitch of 0.8-1.4 mm;

2.5 - with a tooth pitch of 1.6 mm;

3.5 - for type 2 sheets.

Note. For blades made of high-speed steel with a content of alloying elements less than in R6M5 steel, the correction factor for the time of the tenth cut is 1.15.

4.8, 4.9. (Revised edition, Rev. No. 1).

4.10. After testing the canvases for performance, there should be no kinks; they must be suitable for further work.

(Introduced additionally, Rev. No. 1).

4.11. Acceptance values of the average and 95% periods of resistance must be at least

for door leaves type 1

115 and 50 - high speed steel;

70 and 28 - from tool alloy steel;

145 and 75 for type 2.

Note. With an increase in the wiring width to 1.8s, the correction factor for the cut time 10 and the blunting criterion is 1.15; for the average and established periods of resistance - 1.1.

(Changed edition, Rev. No. 1, 2).

5. TRANSPORT AND STORAGE

5.1. Transportation and storage of paintings - in accordance with GOST 18088.

Section 5. (Changed edition, Rev. No. 1).

GEOMETRIC PARAMETERS OF THE TEETH OF THE BLADES

Additionally, requirements are also included for the material, heat treatment, coating of the blades, for the accuracy parameters of the blades, for the setting of the teeth, for the reliability of the blades, for the acceptance rules, methods for controlling the blades, for marking, packaging, transportation and storage. GOST 5406-84

The machine blade is a metal-cutting device installed on hacksaw-type cutting machines. For their manufacture, tool steel grades R6M5, R9 and others are used. The most widespread in production is a canvas having a length of 400-500 millimeters and a width of 32 and 40 millimeters.

With the help of a machine blade, it is possible to cut steel, cast iron or metal products with a round or profile section and a hardness not exceeding 45-55 HRC.

What is a machine saw blade

The hacksaw blade is a thin steel plate with teeth located on one edge and two holes.

The machine cloth can vary in size, as well as be one- and two-sided. The stability of metal cutting depends on the steel grade, so it is very important to choose a blade in strict accordance with the requirements of the regulatory document - GOST 6645-86.

How to choose the right canvas

The choice of machine blade will depend on the material of the workpiece. In this case, you need to focus, first of all, on the number of teeth of the hacksaw (per 1 inch of the section):

for cutting thin metal in the form of a pipe, profile, tube, the number of teeth should be 14 pieces / 25 millimeters;
for cutting material with a small or medium thickness - 10 teeth / 25 millimeters;
for cutting metal with a large thickness - 6 teeth / 25 millimeters;
for cutting soft metal with a large thickness - 4 teeth / 25 millimeters.

If the blade has fewer teeth, then it is intended for cutting metals with a large thickness; if the number of teeth is greater, the blade is used for cutting loose material.

Rules for the operation of the machine cloth

When using a machine hacksaw blade, you need to follow some rules to ensure high quality work and extend the life of the tool:

The machine-type saw must be maintained in the correct conditions and meet regulatory specifications.
The care of the canvas needs to be given as much attention as other machine tools.
It is necessary to clearly control the condition and course of the lifting machine mechanism, the operation of the pump and the cleanliness of the oil being poured.
Be sure to check the correct fastening and tension of the machine blade.
It is necessary to secure the material being cut in a vise securely so that the maximum engagement of the teeth is obtained - at least 4 teeth, maximum 30 teeth.
If more than one part is being cut, each of them must be fixed securely.
If ingots are cut, it is first necessary to thoroughly clean the place of cut with a steel brush.
Too weak and too strong pressure is not allowed.
When performing metal-cutting work, coolant is used without fail.
After processing 2-3 products, you need to check the level of web tension.
When cutting for a long time, the blade requires periodic replacement.
One cut must be made with one machine blade.

- this is the main cutting element of a hand saw or a hacksaw cutting machine, which is a thin and narrow plate with 2 two holes and teeth on one or two ribs. The cut of the material is carried out due to the reciprocating movement of the tool with simultaneous pressure.

Types and design of hacksaw blades

Depending on the purpose, there are two main types of hacksaw blades - manual and machine, designed respectively for manual cutting or work on a cutting machine. They differ primarily in the size of the canvas:

Hand hacksaw blades are 250 and 300 mm long, 12.5 and 25 mm wide, and 0.63 to 1.25 mm thick.
A hacksaw blade can be longer - up to 400 mm, has a greater width and thickness due to increased loads - from 25 to 55 mm in width and from 1.25 to 2 mm in thickness.

The length of the web is determined by the distance between the centers of the mounting holes and ranges from 150 to 400 mm. For hand saws, they can be with one-sided (type A) or two-sided (type B) tooth arrangement.

The main materials of the canvases are steel grades R9, Kh6VF and U10A. The hardness of the material HRC 61-64 is mandatory. To obtain this characteristic, the teeth undergo heat treatment. An important parameter is the tooth pitch, which is from 0.8 to 1.5 mm.

Blades with frequent and sharp teeth, having a groove in the form of an isosceles triangle with an angle at the base of 60 °, have received the greatest use. Coarse pitch blades with a large flute are also widely used, which provide good chip evacuation. The grooves here are made straight, which also guarantees good heat dissipation.

Choice of hacksaw blade

When choosing a hacksaw blade, the characteristics that need to be given special attention are the size of the part and the material. The size of the part determines the possibility of using a canvas of a certain length and width.

The hardness and viscosity of the material affect the choice of blade pitch and tooth size. There are the following recommendations:

Tin, roofing iron, etc. materials of similar thickness - 0.8 mm pitch.
Thin-walled pipes, thin steel profile - about 1 mm.
Thick-walled pipes and other similar materials - at least 1.25 mm.
Cast iron, plastic - 1.2 - 1.5 mm.

Proper application of the blade guarantees its maximum long-term operation. First of all, this concerns the correct tension on the machine. Be sure to read the instructions on how to install a hacksaw blade, how to properly tighten. It needs to be strong enough to work and at the same time allow for a slight flex. The sound of a correctly stretched canvas is a pleasant ringing, if not enough - the sound is lower, in a constricted state - noticeably higher.

The blade is inserted into the frame with the teeth forward.
When working with fragile and hard materials, the canvas should be moistened with water or lubricated with grease.
To cut thin materials, it is necessary that at least 3 teeth participate in the cut.
It is desirable to cut soft and viscous materials with a blade lubricated with soapy water.
Avoid transverse bends and sharp jerks.
For rational use of the teeth of the machine blade, install the workpiece at its right end at the extreme position of the crank.
Use an additional weight when the workpiece is thin.

Current GOSTs

For manual frames, determines the technical conditions of the hacksaw blade GOST 17270-71. The parameters of the hacksaw for metal are regulated by GOST 6645-86

Today there are a huge number of hacksaws for metal. All of them differ in their appearance, characteristics, etc. Also, these tools are divided into professional and home. The most significant difference between these two types will be the metal sheet.

Dimensions

Currently, the standard length for a web is 300 mm. There are also hacksaws, in which this figure is 150 mm. Shorter options are used only in cases where a large hacksaw is not suitable precisely because of its size, or the master needs to perform very delicate work.

If we talk about the teeth of the blade for metal, then they are very small. This choice is due to the fact that it is small teeth that best cope with the task of cutting metal products. The masters of working with this tool pay attention to the fact that the canvas is the most important element, but it is worth paying due attention to the handle of the tool. For some types, it is made very unsuccessfully, and it will be inconvenient to work with such a device, even if the metal sheet meets all the qualities.

Tool Differences

As mentioned earlier, saws are conditionally divided into professional and home. The main advantage of a professional tool is that its design is more rigid, and also makes it possible to work at an angle of 90 and 55 degrees. Home appliances, on the other hand, are most often more flimsy, and during work they are constantly “stormed”. In this case, even a high-quality metal blade does not guarantee a high-quality cut. However, here it is necessary to build on the frequency of using this tool. Home saws are much cheaper, and you should buy them only if the hacksaw is rarely used. If you use this tool quite often, then you should not save.

It is worth mentioning a separate one - a hacksaw-handle. The main difference between this tool and a conventional hacksaw is that it is designed to work with a broken hacksaw blade for metal.

Product design

The design of this tool is almost the same for all models. The saw is a C-shaped arc, between the lower edges of which the blade is fixed or stretched. The working and main part of this tool is the same hacksaw blade for metal, which has many small teeth.

The handle - one of the three main parts of the device, plays a significant role in terms of ease of use of the tool during long-term work. The most successful in terms of performance and comfort of use are two-component composite handles with rubber inserts.

The frame of this tool is an element that is designed to fasten a blade for a hacksaw for metal. In the manufacture of the frame, different materials can be used, but they depend on what type of work the saw will be used for. For example, if you need to cut high strength metals, it is best that the frame is made of high strength composite materials.

It is important to note that the design of the frame largely determines the working conditions. If it is necessary to cut in hard-to-reach places, then it is best to use a frame with blade angle adjustment or simply purchase a shorter version of the fixture.

canvas

A hacksaw blade is a thin strip made of hardened steel. Despite the fact that this is the only metal part in the design of the saw, it is also the most vulnerable to breakage, since the thickness of the product is very small. For this reason, when working with this tool, it is very important to monitor your actions. Careless and careless handling will lead to a quick breakage of a fragile structural element.

teeth

By itself, the steel sheet for metal, the photo of which is presented below, cannot cut other metal parts.

The implementation of this process becomes possible due to the application of small wedge-shaped teeth to the edge of the web. It is very important to pay attention to the hardening of these teeth when choosing a tool. Proper selection will lead to the fact that the service life will increase significantly, as well as the efficiency of cutting the necessary parts. Currently, it is customary to use blades with fine teeth for cutting hard metal products, and large teeth are intended for working with soft parts. The canvases themselves can be made of different types of steel, but it is best to opt for bimetallic ones. If these could not be found, then you can pay attention to the red-hot canvases. These saw elements are made of nickel-plated stainless steel with teeth. It is worth noting that the canvas should be attached in such a way that the teeth go in the opposite direction from the handle.

Canvas selection

The quality of the blade is determined by its teeth. The first selection criterion is the shape of the cutting elements, which can vary depending on the inclination of the edge piece.

The second criterion for choosing a blade is the pitch of the teeth. By this parameter, you can determine what material hardness it is suitable for cutting, as well as choose the maximum possible thickness of the product that can be sawn. This indicator is measured by the number of teeth per inch of the web. It is also important to note that the thickness of the web for metal plays an important role here. For example, on professional 300 mm hacksaws, the thickness will be 0.63 - 1.25 mm. The thickness of the blade for electric saws with a length of 150 mm is from 1.25 to 2.5 mm.

It should also be said that the number of teeth per inch of the blade depends on the thickness and material of the workpiece that will be sawn. For example, when sawing an aluminum workpiece with a thickness of more than 5 mm, it is necessary that the number of teeth per inch be 18. If the thickness is from 2 to 5 mm, then the number of teeth can vary from 18 to 24. When the workpiece is less than 2 mm thick, the number of teeth should be between 24 and 32.

GOST sheets for metal

GOST 6645-86 is a state standard that establishes requirements for the type, size, quality of metal sheets, etc.

This document sets out the rules for the technical production of this product. In particular, steel grades are prescribed in this GOST, from which it is necessary to make types of canvas. For example, type 1 must be made from a steel strip that meets all the requirements of GOST 23522-79. Type 2 hacksaw blade must be made of high speed steel, which is determined in accordance with GOST 19265-73. The document also states that the canvases must be subjected to heat treatment. An acceptable canvas is when the surface is free of cracks, captivity, scale or corrosion.

INTERSTATE STANDARD

HACKSAW BLADES

FOR METAL

TECHNICAL CONDITIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

INTERSTATE STANDARD

HACKSAW BLADES FOR METAL

Specifications

Saw blades for metal cutting.

MKS 25.100.40 OKP 39 2540

Date of introduction 01.07.87

This standard applies to manual and machine hacksaw blades for metal (hereinafter referred to as blades).

The requirements of this standard in terms of Sec. 1, 2, 4, 5 and 3.2 are mandatory, other requirements are recommended.

1. TYPES AND BASIC DIMENSIONS

1.1. Cloths should be made of types:

1 - manual; 2 - machine; executions:

A - with the location of the teeth on one side of the blade;

B - with the location of the teeth on both sides of the blade.

Cloths of type 2 are produced only in execution A.

1.2. The dimensions of the canvases must correspond to those indicated in Fig. 1, 2 and in table. 12.

Version A

Official edition

Reprint prohibited

Table 1

Designation	employment

Continuation of the table. one

Designation	employment

* The sizes of cloths correspond to ISO 2336-80 (see appendix 2).

Note. It is allowed, in agreement with the consumer, to manufacture fabrics with a length of 1\350 and 400 mm with a diameter of mounting holes d = 10.2 mm.

An example of a symbol for a web of execution A, dimensions /[ = 400 mm, s = 1.60 mm, P = 4.00 mm, b = 32 mm:

Hacksaw blade 2800-0044 GOST 6645-86

Version B

* It is allowed to produce canvases with mounting holes with a diameter of 6 mm and a width of 25 mm.

table 2

Designation	Applicability

An example of a symbol for a web with dimensions s = 0.63 mm, P = 1.00 mm:

Hacksaw blade 2800-0079 GOST 6645-86

(Changed edition, Rev. No. 1, 2, 3).

1.3. The geometric parameters of the canvases are indicated in Appendix 1.

2. TECHNICAL REQUIREMENTS

2.1. Cloths must be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.2. Fabrics must be made:

type 2 - from high-speed steel according to GOST 19265. It is allowed to manufacture from other grades of high-speed steel, which ensure the resistance of blades not lower than those made from steel according to GOST 19265.

2.3. Cloths must be thermally processed in accordance with the instructions on the devil. 3 and in table. 3.

Option 1

Option 2

* Allowed 60 mm for curtains with wiring along the entire length of the curtain. ** /z \u003d 0.5 (1 2 - / 1) + 0.5d.

Table 3

2.6. The blades must have a tooth setting:

for type 1:

along the canvas (Fig. 4);

along two adjacent teeth through one undivided one (Fig. 5); for type 2:

for each tooth or through the tooth;

along two adjacent ones through one undivided one (Fig. 5).

2.7. The web layout should be on the entire length of the web or end at a distance of (35 + 5) mm for type 2 webs and 30 mm for type 1 webs from the end.

The value of the tooth setting should be 1.25-1.8 of the blade thickness for blades with a blade set; the wiring pitch should be equal to 8P, but not more than 8 mm.

For blades with a tooth set, the value of the tooth set per side should not exceed 0.15-0.25 of the blade thickness.

2.8. Limit deviations of web dimensions, mm:

length 1\...........

hole diameter d. width for type:

1 at b: 12.5 mm. .

2 at 1\\ up to 400 mm

St. 400 mm tooth pitch for type:

±0.45P per 10 mm length

2.9. The tolerance of the symmetry of the axes of the holes relative to the axis of symmetry of the width of the blade for blades of type 1-1 mm, for blades of type 2-1.4 mm.

2.10. The straightness tolerance of the sides of the web in the free state in the longitudinal direction per 100 mm of length is 0.5 mm for type 1 and 0.3 mm for type 2.

The straightness tolerance in the transverse direction over the entire width of the unset part of the type 2 blade should not exceed 0.8 of the value of the tooth setting per side.

2.12. The height difference between the tops of adjacent blade teeth should not exceed: 0.1 mm for blades with a tooth pitch of up to 1.4 mm; 0.15 mm for blades with a tooth pitch of St. 1.4 mm.

Allowed by agreement with the consumer for blades of type 1 with a tooth pitch of more than 1 mm, the difference in height of adjacent teeth is 0.15 mm.

2.4-2.12. (Revised edition, Rev. No. 1).

2.13. Tolerance of straightness of the line of the tops of the teeth of the blade, mm:

for cloths of type 1 execution A - 1.4;

for other canvases:

at 1\ to 350 mm - 1.0;

at 1\ St. 350 to 600 mm - 1.5;

at 1\ St. 600 mm - 2.5.

(Revised edition, Rev. No. 2).

type 1 blades - by 0.05 mm, for type 2 blades - by 0.1 mm.

(Revised edition, Rev. No. 1).

2.15. The average and 95 percent period of resistance under the test conditions specified in Sec. 4, must be at least, min:

for type 1 sheets:

98 and 42 - high speed steel;

60 and 24 - from tool alloy steel;

123 and 64 - for type 2 blades.

Note. For a tool made from high-speed steel grades with a content of alloying elements less than in R6M5 grade steel, the correction factor for the average and specified period of resistance is 0.8.

2.16. The criterion for blunting blades is the loss of productivity, expressed by the time of cutting the workpiece according to the sections indicated in Table. 4, which should not exceed, min:

for type 1 HSS blades:

with tooth pitch 0.8 - 1.4 mm ..................................1.4

with a tooth pitch of 1.6 mm .............................. 4.0

with a tooth pitch of 0.8 - 1.4 mm .............................. 1.6

with a tooth pitch of 1.6 mm .............................. 5.0

for type 2 blades.......................................5.25

2.17. On each canvas must be clearly marked: the trademark of the manufacturer;

canvas width; blade tooth pitch;

steel grade (steel grade 11RZAMEF2 is not marked).

(Changed edition, Rev. No. 1, 2).

2.18. (Deleted, Rev. No. 2).

2.19. Other requirements for packaging, labeling of transport and consumer packaging - in accordance with GOST 18088.

3. ACCEPTANCE

3.1. Acceptance - according to GOST 23726.

(Revised edition, Rev. No. 2).

3.2. Testing of canvases for the average durability period should be carried out once every three years on at least 5 canvases, for a 95% durability period - once a year on at least 5 canvases.

Blade tests should be carried out on one size of each type of blade.

(Changed edition, Rev. No. 1, 2).

4. CONTROL METHODS

4.1. Appearance control is carried out visually.

4.2. When controlling the parameters of canvases, methods and means of control should be used, the error of which should be no more than:

values specified in GOST 8.051 - when measuring linear dimensions;

35% of the tolerance value for the checked angle - when measuring angles;

25% of the tolerance value for the parameter being checked - when controlling the shape and location of surfaces.

4.3. The dimensions of the blades and the difference in height between the tops of two adjacent teeth of the blade are measured before setting the teeth.

4.4. The hardness of the sheets is measured according to GOST 9013.

4.5. Type 1 blades are tested for tooth sharpness and elasticity before durability tests:

the sharpness of the teeth of the blades must ensure adhesion to the control insert with a hardness of 56 HRC 3 .

4.1-4.5. (Revised edition, Rev. No. 1).

4.6. Tests of blades for performance, the average and 95% periods of durability should be carried out on hacksaws that meet the standards of accuracy and rigidity established for them, on samples of steel grade 45 according to GOST 1050, hardness 180. . . 190 HB.

4.7. Testing of canvases should be carried out in the modes indicated in Table. four.

Table 4

* Static force when the sample being cut is located at the middle of the length of the test web section and the crank pin at the top of the disk.

** With connecting rod and hydraulic drive disengaged.

The correction factor for the blunting criterion is 1.65.

Note. During the reverse stroke, the force on the canvas is not removed.

4.6-4.7. (Changed edition, Rev. No. 1, 2).

4.8. When testing cloths of type 2, a 5% (by mass) solution of emulsol in water with a flow rate of 6-8 l / min should be used as a cutting fluid.

4.9. Testing of cloths for operability should be carried out with ten cuts, while the time of the last cut should not exceed, min:

for door leaves type 1

from high speed steel:

0.7 - with a tooth pitch of 0.8-1.4 mm;

2.0 - with a tooth pitch of 1.6 mm;

from tool alloy steel:

0.8 - with a tooth pitch of 0.8-1.4 mm;

2.5 - with a tooth pitch of 1.6 mm;

3.5 - for type 2 sheets.

Note. For blades made of high-speed steel with a content of alloying elements less than in R6M5 steel, the correction factor for the time of the tenth cut is 1.15.

4.8, 4.9. (Revised edition, Rev. No. 1).

4.10. After testing the canvases for performance, there should be no kinks; they must be suitable for further work.

(Introduced additionally, Rev. No. 1).

4.11. Acceptance values of the average and 95% periods of resistance must be at least

for door leaves type 1

115 and 50 - high speed steel;

70 and 28 - from tool alloy steel;

145 and 75 for type 2.

Note. With an increase in the wiring width to 1.8s, the correction factor for the cut time 10 and the blunting criterion is 1.15; for the average and established periods of resistance - 1.1.

(Changed edition, Rev. No. 1, 2).

5. TRANSPORT AND STORAGE

5.1. Transportation and storage of canvases - according to GOST 18088.

Section 5. (Changed edition, Rev. No. 1).

GEOMETRIC PARAMETERS OF THE TEETH OF THE BLADES

Front angle y = 0°.

APPENDIX 1. (Changed edition, Rev. No. 1).

APPENDIX 2 Reference

COMPLIANCE OF THIS STANDARD WITH ISO 2336-80 STANDARD

The sizes of hand and machine hacksaw blades with the location of the teeth on one side of the blade and their maximum deviations, established in this standard, fully cover the nomenclature of hacksaw blade sizes according to ISO 2336-80. The dimensions of hacksaw blades according to ISO 2336-80 are noted in Table. 1 of this standard is marked *.

This standard expands the range of sizes for hand and machine hacksaw blades with teeth on one side, in addition, manual blades with teeth on both sides are included in the standard.

APPENDIX 2 (Introduced additionally, Amendment No. 2).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Machine Tool and Tool Industry of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated July 30, 1986 No. 2294

3. The standard fully complies with ISO 2336-80

4. The standard fully complies with ST SEV 6977-90

5. REPLACE GOST 6645-68

6. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

	Item number
GOST 8.051-81
GOST 1050-88
GOST 5406-84
GOST 5950-2000
GOST 6631-74
GOST 9013-59
GOST 18088-83
GOST 19265-73
GOST 23522-79
GOST 23726-79

7. The limitation of the validity period was removed by the Decree of the State Standard of the USSR dated 04/09/91 No. 463

8. EDITION (September 2004) with Amendments No. 1, 2, 3, approved in April 1989, April 1991, April 1992 (IUS 7-89, 7-91, 7-92)

Editor L.V., Koretnikova Technical editor O.N. Vlasova Proofreader V. S. Chernaya Computer proofing by S. V. Ryabova

Ed. persons. No. 02354 dated 07/14/2000. Handed over to the set 09/30/2004. Signed for publication on October 25, 2004. Conditions.print.l. 1.40. Uch.-ed.l. 0.85.

Circulation 95 copies. From 4338. Law. 858.

IPK Publishing house of standards, 107076 Moscow, Kolodezny per., 14. e-mail:

Typed at the Publishing House on a PC

Printed in the branch of IPK Publishing house of standards - type. Moscow Printer, 105062 Moscow, Lyalin per., 6.