GOST 7062-90

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  ГОСТ 7062-90

GOST 7062−90 Forgings from carbon and alloy steel, fabricated by press forging. Allowances and tolerances

GOST 7062−90

Group B03

INTERSTATE STANDARD

FORGINGS FROM CARBON AND ALLOY STEEL, FABRICATED BY PRESS FORGING

Allowances and tolerances

Carbon and alloyed steel forgings fabricated by press forging. Allowances and tolerances

OKP 08 9300

Date of introduction 1992−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of heavy machine building of the USSR

2. APPROVED AND put INTO EFFECT by DECISION of the USSR State Committee on management of quality and standards from 24.12.90 N 3238

3. The term of the first scan — 1996

4. REPLACE GOST 7062−79

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	The number of the paragraph, subparagraph
GOST 8479−70	20

6. Limitation of actions taken by Protocol No. 7−95 Interstate Council for standardization, Metrology and certification (ICS 11−95)

7. REISSUE

1. This standard applies to forgings for General purpose weighing up to 130 t carbon and alloy steel (total content of alloying elements up to 10%, except for carbon), fabricated by press forging, and sets the size of the machining allowances, tolerances on the nominal dimensions of the forgings, the magnitude of overlaps for forgings.

The standard does not apply to forgings of high-alloy steels and alloys with special physical properties: from ingots cast under vacuum, made of metal, var and ESR; of tool steels with a carbon content of more than 0.55% alloying elements or more than 5%, and also steel intended for the manufacture of rolls for cold rolling.

Terms and definitions used in the standard given in the Appendix.

The standard requirements are mandatory.

2. Allowances on samples for mechanical tests of forged parts, grippers for hanging forgings during heat treatment, and other special allowances in this standard are not provided.

3. Allowances under this standard, designate the nominal dimensions shown on the detail drawing, or in the case that the forging before heat treatment is subjected to the roughing, in the nominal dimensions shown on the drawing, the technological pre-treated (stripped) of the workpiece. If the forging is subjected to heat treatment without prior mechanical treatment (in black), the allowances assigned under this standard, allowed the appointment of additional allowances necessary to perform heat treatment.

4. The scheme of allowances and tolerances on the outside size details given on features.1.

Damn.1. The scheme of allowances and tolerances on the outside size details

 — rough blank size or the nominal size of the part;  — the minimum size of forgings ;  — the nominal (estimated) size forgings; ;
 — the largest size of the forgings;
;
the minimum allowance for size :
;
 — nominal allowance for size :

 — tolerance: ;
 — maximum deviation from the nominal size of forgings:

Damn.1

5. The value of allowances that are defined in the tables of this standard are nominal part size is based on surface treatment of forgings on both sides. Limit deviations specified for the nominal dimensions of the forgings.

When machining the workpiece on one side of the seam allowance should be half the magnitude specified for the table, and the upper and lower limit deviations thus remain unchanged.

6. Machined surfaces of forgings deviation to the relevant dimensions is determined by the tables of this standard and the allowances are equal to zero.

7. The volume and weight of the forgings is determined by calculation based on the nominal dimensions taking into account the overlaps on the bevels, sides, areas and other elements of forging.

Forging is considered to be made on the first group exactly if its dimensions provide suitable details, and forging weight, determined by calculation on the actual size, 2−4% less than the mass specified by nominal dimensions.

8. Allowed the estimated nominal size of forgings rounding to numbers ending in 5 or 0. Nominal dimensions are rounded down if they end in 1, 2, 6 and 7 and in a big way, if they end in 3, 4, 8, and 9.

9. The choice of values for the tolerances, clearances and overlaps is performed, depending on the type of forgings and the ratio of sizes according to the table.1.

Table 1

Room sketch	Type forgings	Sketch forgings	The ratio of the size	Number tables of allowances and tolerances
1	Smooth, round and rectangular section			2
2			3
3	Round section with ledges		mm	2, 4, 5
4
5	Circular cross section with recess		mm	2, 4, 5, 6, 7
6	Circular cross section with collar		mm	2, 4, 5, 7
7	Circular cross section with flange		mm	2, 4, 5, 7
8	Square cross section with ledges of the same types as the round cross-section			3, 4, 5
9	Circular cross section with cone		mm	2, 4, 5
10	Cylinders			8
11	Discs without hole and with hole			8, 9
12	Clutch			8, 9
13	Rods and plates without holes and with holes			9, 11
14	Cylinders with holes			12, 13
15	Rolled rings			14

Note. Types of forgings not covered by this standard (size and configuration), tolerances, allowances and overlaps choose at the supplier’s discretion.

10. Allowances and limit deviations of ±/2 for plain forgings of circular cross section should be appointed in accordance with the devil.2 and table 2.

Damn.2. Allowances and limit deviations for plain forgings of circular cross section

Damn.2

Table 2

mm

The length of the part	Diameter details
To 140	SV. 140 160	SV. 160 to 180	SV. 180 up to 200	SV. 200 to 224	SV. 224 up to 250	SV. 250 to 280
Allowances and limit deviations
Up to 1000 incl.	20±4	20±5	20±5	20±5	20±6	20±6	20±6
SV. 1000 to 1250 «	20±5	20±5	20±5	20±6	20±6	20±6	20±7
«1250» 1600 «	20±5	20±5	20±6	20±6	20±6	20±7	20±7
«1600» 2000 «	20±5	20±6	20±6	20±7	20±7	20±7	20±7
«2000» 2500 «	20±6	20±6	20±6	20±7	20±7	20±7	20±7
«2500» 3150 «	20±6	20±6	20±7	20±7	20±7	21±7	22±8
«3150» 4000 «	20±6	20±7	20±7	20±7	21±7	22±8	22±8
«4000» 5000 «	20±7	20±7	20±7	21±7	22±8	22±8	23±8
«5000» 6300 «	20±7	20±7	21±7	22±8	22±8	23±8	24±9
«6300» 7100 «	20±7	21±7	22±8	22±8	23±8	24±9	25±9
«7100» 8000 «	21±7	22±8	22±8	23±8	24±9	25±9	26±10
«8000» 9000 «	-	22±8	23±8	24±9	25±9	26±10	27±10
«9000» 10000 «	-	-	24±9	25±9	26±10	27±10	28±10
«10000» 11200 «	-	-	-	26±10	27±10	28±10	29±11
«11200» 12500 «	-	-	-	-	28±10	29±11	30±11
«12500» 14000 «	-	-	-	-	-	31±11	32±11
«14000» 16000 «	-	-	-	-	-	-	33±12
«16000» 18000 «	-	-	-	-	-	-	-
«18000» 20000 «	-	-	-	-	-	-	-

Extension table 2

mm

The length of the part	Diameter details
SV. 280 315	SV. 315 to 355	SV. 355 up to 400	SV. 400 up to 450	SV. 450 up to 500	SV. 500 to 560	SV. 560 630	SV. 630 to 710	SV. 710 to 800
Allowances and limit deviations
Up to 1000 incl.	20±7	20±7	20±7	21±7	22±8	22±8	23±8	24±9	25±9
SV. 1000 to 1250 «	20±7	20±7	21±7	22±8	22±8	23±8	24±9	25±9	26±10
«1250» 1600 «	20±7	21±7	22±8	22±8	23±8	24±9	25±9	26±10	27±10
«1600» 2000 «	21±7	22±8	22±8	23±8	24±9	25±9	26±10	27±10	28±10
«2000» 2500"	22±8	22±8	23±8	24±9	25±9	26±10	27±10	28±10	29±11
«2500» 3150 «	22±8	23±8	24±9	25±9	26±10	27±10	28±10	29±11	30±11
«3150» 4000 «	23±8	24±9	25±9	26±10	27±10	28±10	29±11	30±11	31±11
«4000» 5000 «	24±9	25±9	26±10	27±10	28±10	29±11	30±11	31±11	32±12
«5000» 6300 «	25±9	26±10	27±10	28±10	29±11	30±11	31±11	32±12	33±12
«6300» 7100 «	26±10	27±10	28±10	29±11	30±11	31±11	32±12	33±12	34±12
«7100» 8000 «	27±10	28±10	29±11	30±11	31±11	32±12	33±12	34±12	35±13
«8000» 9000 «	28±10	29±11	30±11	31±11	32±12	33±12	34±12	35±13	36±13
«9000» 10000 «	29±11	30±11	31±11	32±12	33±12	34±12	35±13	36±13	37±13
«10000» 11200 «	30±11	31±11	32±12	33±12	34±12	35±13	36±13	37±13	38±14
«11200» 12500 «	31±11	32±12	33±12	34±12	35±12	36±13	37±13	38±14	40±14
«12500» 14000 «	32±12	33±12	34±12	35±13	36±13	37±13	37±14	40±14	43±14
«14000» 16000 «	34±12	35±13	36±13	37±13	38±13	39±13	40±14	43±14	46±15
«16000» 18000 «	35±13	37±13	38±13	39±13	40±13	41±14	42±14	46±15	49±15
«18000» 20000 «	37±13	39±13	40±13	41±14	42±14	43±14	44±14	49±15	51±16

The end of the table. 2

mm

The length of the part	Diameter details
SV. 800 to 900	SV. 900 up to 1000	SV. 1000 to 1120	SV. 1120 up to 1250	SV. 1250 to 1400	SV. 1400 up to 1600	SV. 1600 to 1800	SV. 1800 up to 2100
Allowances and limit deviations
Up to 1000 incl.	26±10	28±10	-	-	-	-	-	-
SV. 1000 to 1250 «	27±10	28±10	30±11	-	-	-	-	-
«1250» 1600 «	28±10	29±11	30±11	31±11	-	-	-	-
«1600» 2000 «	29±11	30±11	31±11	32±12	33±12	-	-	-
«2000» 2500 «	30±11	31±11	32±12	33±12	34±12	35±13	-	-
«2500» 3150 «	31±11	32±12	33±12	34±12	35±13	36±13	38±14	-
«3150» 4000 «	32±12	33±12	34±12	35±13	36±13	37±13	39±14	41±14
«4000» 5000 «	33±12	34±12	35±13	36±13	37±13	38±14	40±14	43±14
«5000» 6300 «	34±12	35±13	36±13	37±13	38±14	40±14	43±14	46±15
«6300» 7100 «	35±13	36±13	37±13	38±14	40±14	43±14	46±15	49±15
«7100» 8000 «	36±13	37±13	38±14	40±14	43±14	46±15	49±15	51±16
«8000» 9000 «	37±13	38±14	40±14	43±14	46±15	49±15	51±16	54±16
«9000» 10000 «	38±14	40±14	43±14	46±15	49±15	51±16	54±16	57±17
«10000» 11200 «	40±14	43±14	46±15	49±15	51±16	54±16	57±17	-
«11200» 12500 «	43±14	46±15	49±15	51±16	54±16	57±17	-	-
«12500» 14000 «	46±15	49±15	51±16	54±16	57±17	-	-	-
«14000» 16000 «	49±15	51±16	54±16	57±17	-	-	-	-
«16000» 18000 «	51±16	54±16	57±17	-	-	-	-	-
«18000» 20000 «	54±16	57±17	-	-	-	-	-	-

Notes:

1. Table 2 apply to parts which

.

2. Lower limit deviation of length of the forging is allowed to increase by 50%.

3. Bevels after rubow must be free of burrs and must not interfere with the production centers.

4. A lot of overlap on the bevel after cutting one side, kg, is calculated by the formula

.

Lapping length of the tube on one side should not exceed . The angle of the bevel of the tube is not controlled.


Example of assignment allowances and tolerances forgings smooth round cross-section given on features.3.

Damn.3. Example of assignment allowances and tolerances forgings smooth round cross section

Damn.3

11. Allowances and limit deviations for smooth forgings of rectangular section should be appointed in accordance with the devil.4 and table.3.

Damn.4. Allowances and limit deviations for smooth forgings of rectangular section

Damn.4

Table 3

mm

The length of the part	The size of section
To 140	SV. 140 160	SV. 160 to 180	SV. 180 up to 200	SV. 200 to 224	SV. 224 up to 250	SV. 250 to 280
Allowances and limit deviations
Up to 1000 incl.	20±4	20±5	20±5	20±5	20±6	20±6	21±6
SV. 1000 to 1250 «	20±5	20±5	20±5	20±6	20±6	21±6	22±7
«1250» 1600 «	20±5	20±5	20±6	20±6	21±6	22±7	23±7
«1600» 2000 «	20±5	20±6	20±6	21±6	22±7	23±7	24±7
«2000» 2500 «	20±6	20±6	21±6	22±7	23±7	24±7	25±8
«2500» 3150 «	20±6	21±6	22±7	23±7	24±7	25±8	26±8
«3150» 4000 «	21±6	22±7	23±7	24±7	25±8	26±8	27±8
«4000» 5000 «	22±7	23±7	24±7	25±8	26±8	27±8	28±8
«5000» 6300 «	23±7	24±7	25±8	26±8	27±8	28±8	29±9
«6300» 7100 «	-	25±8	26±8	27±8	28±8	29±9	30±9
«7100» 8000 «	-	-	27±8	28±8	29±9	30±9	31±10
«8000» 9000 «	-	-	-	31±9	32±9	33±10	34±10
«9000» 10000 «	-	-	-	-	33±10	34±10	35±10
«10000» 11200 «	-	-	-	-	-	35±10	36±11
«11200» 12500 «	-	-	-	-	-	-	37±11

Extension table 3

mm

The length of the part	The size of section
SV. 280 315	SV. 315 to 355	SV. 355 up to 400	SV. 400 up to 450		SV. 450 up to 500	SV. 500 to 560	SV. 560 630		SV. 630 to 710	SV. 710 to 800
Allowances and limit deviations
Up to 1000 incl.	22±7	23±7	24±7	25±8	26±8		27±8	28±8	29±9		30±9
SV. 1000 to 1250 «	23±7	24±7	25±8	26±8	27±8		28±8	29±9	30±9		31±10
«1250» 1600 «	24±7	25±8	26±8	27±8	28±8		29±9	30±9	31±10		32±10
«1600» 2000 «	25±8	26±8	27±8	28±8	29±9		30±9	31±10	32±10		33±10
«2000» 2500 «	26±8	27±8	28±8	29±9	30±9		31±10	32±10	33±10		34±11
«2500» 3150 «	27±8	28±8	29±9	30±9	31±10		32±10	33±10	34±11		36±11
«3150» 4000 «	28±8	29±9	30±9	31±10	32±10		33±10	34±11	35±11		36±11
«4000» 5000 «	29±9	30±9	31±10	32±10	33±10		34±11	35±11	36±11		37±12
«5000» 6300 «	30±9	31±10	32±10	33±10	34±11		35±11	36±11	37±12		38±12
«6300» 7100 «	31±10	32±10	33±10	34±11	35±11		36±11	37±12	38±12		39±12
«7100» 8000 «	32±10	33±10	34±11	35±11	36±11		37±12	38±12	39±12		40±13
«8000» 9000 «	35±10	36±11	37±11	38±11	39±12		40±12	41±12	42±13		43±13
«9000» 10000 «	36±11	37±11	38±11	39±12	40±12		41±12	42±12	43±13		44±13
«10000» 11200 «	37±11	38±11	39±12	40±12	41±12		42±13	43±13	44±13		45±14
«11200» 12500 «	38±11	39±12	40±12	41±12	42±12		43±13	44±13	45±14		47±14
«12500» 14000 «	39±12	40±12	41±12	42±13	43±13		44±13	45±14	47±14		49±15
«14000» 16000 «	-	42±13	43±13	44±13	45±14		46±14	48±15	50±15		52±16
«16000» 18000 «	-	-	45±14	46±14	47±14		49±15	51±15	53±16		55±17
«18000» 20000 «	-	-	-	48±15	50±15		52±16	54±17	56±17		59±18

The end of the table.3

mm

The length of the part	The size of section
SV. 800 to 900	SV. 900 up to 1000	SV. 1000 to 1120	SV. 1120 up to 1250	SV. 1250 to 1400	SV. 1400 up to 1600	SV. 1600 to 1800	SV. 1800 up to 2100
Allowances and limit deviations
Up to 1000 incl.	31±10	-	-	-	-	-	-	-
SV. 1000 to 1250 «	32±10	33±10	34±11	-	-	-	-	-
«1250» 1600 «	33±10	34±11	35±11	36±12	-	-	-	-
«1600» 2000 «	34±11	35±11	36±11	37±12	28±12	-	-	-
«2000» 2500 «	35±11	36±11	37±12	38±12	39±12	40±13	-	-
«2500» 3150 «	36±11	37±12	38±12	39±12	40±13	41±13	42±13	-
«3150» 4000 «	37±12	38±12	39±12	40±13	41±13	43±13	43±14	45±14
«4000» 5000 «	38±12	39±12	40±13	41±13	42±13	43±14	45±14	47±15
«5000» 6300 «	39±12	40±13	41±13	42±13	43±14	45±14	47±15	49±16
«6300» 7100 «	40±13	41±13	42±13	43±14	45±14	47±15	49±16	51±16
«7100» 8000 «	41±13	42±13	43±14	45±14	47±15	49±16	51±16	54±17
«8000» 9000 «	44±13	45±14	47±14	49±15	51±16	53±16	56±17	-
«9000» 10000 «	45±14	47±14	49±15	51±16	53±16	56±17	-	-
«10000» 11200 «	47±14	49±15	51±16	53±16	56±17	-	-	-
«11200» 12500 «	49±15	51±16	53±16	56±17	-	-	-	-
«12500» 14000 «	51±16	53±16	56±17	-	-	-	-	-
«14000» 16000 «	54±17	57±18	-	-	-	-	-	-
«16000» 18000 «	58±18	-	-	-	-	-	-	-
«18000» 20000 «	-	-	-	-	-	-	-	-

Notes:

1. Table 3 apply to parts, which and .

2. Lower limit deviation of length of the forging is allowed to increase by 50%.

3. Bevels after rubow must be free of burrs.

4. Weight (kg) inlet on the bevel after cutting with one hand () is calculated by the formula

.

5. The length of the inlet from the Roubaix on the one hand should not exceed . The angle of the bevel of the tube is not controlled.


Example of assignment allowances and tolerances given on features.5

Damn.5. Example of assignment allowances and tolerances

Damn.5

12. Forging shaft with ledges and recesses circular (square) cross-section given on features.6.

Damn.6. Forging shaft with ledges and recesses circular (square) cross-section

Damn.6

Allowances and limit deviations for shafts with ledges and recesses is determined in the following way:

12.1. According to table.2 and 3 choose basic allowances and limit deviations of ±/2 in diameter, based on the full shaft length and diameter of the considered section.

12.2. Allowances and limit deviations for the total length and dimensions from a single base to the ridges and ledges is selected in accordance with the devil.6. Choose a base end of the projection of the greatest cross-section is not a end of the forging. Allowed the dimensioning of forging differs from that indicated on the devil.6.

12.3. Additional allowance choose at the table.4 the diameters of all sections, except the main one, depending on the difference of the diameters of the main and consider the section of the part.

Table 4

mm

The difference between the diameters (sizes) of sections	Up to 56	SV. 56 up to 80	SV. 80 to 112	SV. 112 to 140	SV. 140 to 180	SV. 180 to 224	SV. 224 up to 250	SV. 250 to 280	SV. 280 315	SV. 315 to 355
Additional allowance on diameter (size)	2	3	4	5	7	8	9	10	12	13

Extension table 4

mm

The difference between the diameters (sizes) of sections	SV. 355 up to 400	SV. 400 to 425	SV. 425 up to 450	SV. 450 to 475	SV. 475 up to 500	SV. 500 to 530	SV. 530 to 560	SV. 560 up to 600	SV. 600 630	SV. 630 670
Additional allowance on diameter (size)	14	15	16	17	18	19	20	22	23	24

The end of the table.4

mm

The difference between the diameters (sizes) of sections	SV. 670 to 710	SV. 710 up to 750	SV. 750 to 800	SV. 800 to 850	SV. 850 to 900	SV. 900 to 950	SV. 950 up to 1000	SV. 1000 to 1100	SV. 1100 up to 1200	SV. 1200 to 1300
Additional allowance on diameter (size)	25	27	29	30	32	34	36	40	45	52

12.4. The main cross section determined as follows: for shafts with a single ledge (see table.1, sketch 7), the main cross-section consider the cross-section, the product of which has a maximum value;

for shafts with two ledges (see table.1, sketches 3, 4, 6), I think the main section having a maximum diameter provided . Otherwise, I think the main section, having an average diameter ;

for shafts with a notch (see tab.1, sketch 5) I think the main section having a maximum diameter provided . Otherwise, I think the main section having the minimum diameter is the diameter of the recess.

For shafts with more than two ledges or a combination of ledges and recesses (see the devil.6), I think the main section having a maximum diameter.

Allowed as the main section to choose a different section if it reduces the mass of the forging.

12.5. If you increase the allowances on diameters of ledges and overhangs under subparagraph 12.3 deviation are not changed.

Allowed lower limit deviation increase in the amount of additional allowance.

12.6. For forgings with a rectangular section instead of a diameter to accept the dimensions of the side section.

12.7. The possibility of formation of ledges and recesses in forgings define according to claim 13, and clamps and flanges — according to claim 14.

12.8. Deviations in the length of the seizure do not choose. The actual size of the recess provide most of the usable parts.

Note. A lot of overlap () on the bevel between the ledges (quirk), kg, is calculated by the formula

,

where and are the diameters of the adjacent sections.

The chamfer angle fillets not control.

An example of the variety of allowances and deviations in the forging step for the part specified on the devil.7 given on features.8.

Damn.7. An example of the variety of allowances and deviations in the forging step for the detail

Damn.7

Damn.8. An example of the variety of allowances and deviations in the forging step for the detail

Damn.8

The item has more than two benches, therefore, for the main taking section having the largest diameter (=700 mm).

Basic allowances and tolerances on the diameter is determined according to table.2, additional — on the table.4.

Diameter 700 mm core allowance and tolerance (30±11) mm, additional allowance is not selected.

Diameter 420 mm basic allowance and tolerance (26±10) mm, additional allowance of 10 mm.

Diameter 600 mm core allowance and tolerance (29±11) mm, additional allowance of 4 mm.

Diameter 450 mm basic allowance and tolerance (26±10) mm, additional allowance 9 mm.

Diameter 350 mm core allowance and tolerance (24±9) mm, an additional allowance of 13 mm.

Allowances and tolerances in length of the forging is determined in accordance with the devil.6.

Allowance plus 67.5 mm, tolerance ±16.5 mm — length 600 mm.

Allowance minus 44.25 mm, the tolerance is not assigned on a length of 1000 mm.

Allowance minus 0.75 mm, tolerance ±16.5 mm — length 1400 mm.

Allowance minus 3 mm tolerance ±16.5 mm — length 2100 mm.

Allowance plus 81 mm, tolerance ±30 mm — length 3300 mm.

13. The minimum dimensions of the heights and lengths of the ledges and recesses of forgings in accordance with the standard drawings of forgings 9 and 10 are shown respectively in table.5 and 6.

Damn.9. The minimum dimensions of the heights and lengths of the ledges and recesses of forgings in accordance with the standard drawings of forgings 9 and 10

Damn.9

Damn.10. The minimum dimensions of the heights and lengths of the ledges and recesses of forgings in accordance with the standard drawings of forgings 9 and 10

Damn.10

Notes:

1. Intermediate ledges , etc. (see shit.9) are subject, if their length is equal to or greater than 0.5 of the values in the table.6.

2. If the ledge is available on the details (see the devil.9), the forging is not performed, to determine the value of the neighboring ledge is the total height of the ledges . If the ledge (see the devil.9) on the forging is not performed, to determine the value of the neighboring ledge is only the height of the ledge , etc.

3. At the height of the bench , , , or recess , less than 40 mm the minimum allowable length, determined by the table.6, increase by 25%.

4. In determining the feasibility of a cut on the table.6 takes its smallest diameter or adjacent to the notch.

5. The recesses are executed in the case that the length of the tick before projimo recesses is equal to or greater than the width of the dies (suspended nodelock) press, which is forging. Allowed the appointment of additional inlet to the diameter of the recess with the purpose of bringing it up to feasible.


The height of the ledge is 253 mm. At the table.5 the minimum height of the ledge should be at least 30 mm, so the ledge is not performed (see the devil.11).

The length of the recess is 253 mm. At the table.6 the minimum length of recess should be 610 mm, and therefore the notch (see the devil.11) does not correspond to the present standard.

The rest of the ledges and recesses are no overlaps, since their height and length greater than the minimum stipulated in the table.5 and 6.

Table 5

mm

Length forgings	Diameter () or size () adjacent to the ledge
Up to 200	SV. 200 to 235	SV. 235 to 270	SV. 270 to 300	SV. 300 to 335	SV. 335 to 370	SV. 370 to 400	SV. 400 to 435	SV. 435 to 470	SV. 470 to 500	SV. 500 to 535	SV. 535 to 570	SV. 570 to 600
The minimum feasible height of the ledge () or collection ()
Up to 1000 incl.	12	12	14	15	16	17	18	19	20	21	22	23	24
SV. 1000 to 2000 «	12	13	15	16	17	18	19	20	21	22	23	24	25
«2000» 3000 «	13	15	16	17	18	19	20	21	22	23	23	25	26
«3000» 4000 «	15	16	17	18	19	20	21	22	23	24	25	26	27
«4000» 5000 «	16	17	18	19	21	22	23	24	24	25	26	27	28
«5000» 6000 «	17	18	19	20	21	22	Twenty three	24	25	26	27	28	29
«6000» 7000 «	18	19	20	21	22	23	24	25	26	27	28	29	30
«7000» 8000 «	19	20	21	22	23	24	25	26	27	28	29	30	31
«8000» 9000 «	20	21	22	23	24	25	26	27	27	28	29	30	31
«9000» 10000 «	21	22	23	24	25	26	26	27	28	29	30	30	31
«10000» 11000 «	22	23	23	24	25	26	27	28	29	30	31	31	32
«11000» 12000 «	22	23	24	25	26	27	27	28	29	30	31	32	33
«12000» 13000 «	23	24	24	25	26	27	28	29	29	30	31	32	33
«13000» 14000 «	23	24	25	25	26	Twenty seven	28	29	29	30	31	32	33
«14000» 15000 «	24	25	26	27	28	29	30	31	33	33	34	35	36
«15000» 16000 «	-	26	27	28	29	30	31	32	33	34	35	36	37
«16000» 17000 «	-	-	28	29	30	31	32	33	34	35	36	37	38
«17000» 18000 «	-	-	-	30	31	32	33	34	35	36	37	38	39
«18000» 19000 «	-	-	-	-	32	33	34	35	36	37	38	39	40
«19000» 20000 «	-	-	-	-	-	34	35	36	37	38	39	40	41

Extension table 5

mm

Length forgings	Diameter () or size () adjacent to the ledge
SV. 600 to 635	SV. 635 to 670	SV. 670 to 700	SV. 700 to 750	SV. 750 to 800	SV. 800 to 835	SV. 835 to 870	SV. 870 to 900	SV. 900 to 950	SV. 950 to 1000	SV. 1000 to 1050	SV. 1050 to 1100	SV. 1100 to 1150
The minimum feasible height of the ledge () or collection ()
Up to 1000 incl.	25	26	27	28	29	30	31	32	33	34	35	36	37
SV. 1000 to 2000 «	26	27	28	29	30	31	32	33	34	35	36	37	38
«2000» 3000 «	27	28	29	30	31	32	33	33	35	36	37	37	38
«3000» 4000 «	28	29	30	30	31	32	33	34	35	36	37	38	39
«4000» 5000 «	29	30	31	31	32	32	33	34	36	37	38	40	40
«5000» 6000 «	30	31	32	32	33	34	Thirty four	35	36	37	38	40	40
«6000» 7000 «	31	31	32	33	33	34	35	36	37	38	39	40	41
«7000» 8000 «	31	32	33	34	35	36	36	37	38	38	39	40	41
«8000» 9000 «	32	33	34	34	35	36	37	38	38	39	40	41	42
«9000» 10000 «	32	33	34	34	35	36	37	38	39	40	40	41	42
«10000» 11000 «	33	33	34	35	36	37	37	38	39	40	41	42	43
«11000» 12000 «	33	34	35	35	36	37	38	39	40	41	42	43	44
«12000» 13000 «	33	34	36	37	37	38	38	39	40	41	42	43	44
«13000» 14000 «	34	34	36	36	37	Thirty eight	39	40	41	42	43	44	45
«14000» 15000 «	37	38	39	40	41	42	43	44	45	46	47	48	49
«15000» 16000 «	38	39	40	41	42	43	44	45	46	47	48	49	50
«16000» 17000 «	39	40	41	42	43	44	45	46	47	48	49	50	51
«17000» 18000 «	40	41	42	43	44	45	46	47	48	49	50	51	52
«18000» 19000 «	41	42	43	44	45	46	47	48	49	50	51	52	53
«19000» 20000 «	42	43	44	45	46	47	48	49	50	51	52	53	54

The end of the table.5

mm

Length forgings	Diameter () or size () adjacent to the ledge
SV. 1150 up to 1200	SV. 1200 to 1300	SV. 1300 to 1350	SV. 1350 to 1400	SV. 1400 to 1450	SV. 1450 to 1500		SV. 1500 to 1600	SV. 1600 to 1700	SV. 1700 to 1900
The minimum feasible height of the ledge () or collection ()
Up to 1000 incl.	38	39	40	41	42		43	45	47	50
SV. 1000 to 2000 «	39	40	41	42	43		44	46	49	52
«2000» 3000 «	39	40	41	42	43		44	47	50	53
«3000» 4000 «	40	41	42	43	44		45	48	51	54
«4000» 5000 «	41	42	43	44	45		46	49	52	55
«5000» 6000 «	42	43	44	45	46		47	50	53	56
«6000» 7000 «	43	44	45	46	47		48	51	54	57
«7000» 8000 «	43	45	46	47	48		49	52	55	Fifty eight
«8000» 9000 «	43	45	47	48	49		50	53	56	59
«9000» 10000 «	43	45	47	48	49		50	54	57	60
«10000» 11000 «	44	45	47	49	50		51	55	58	61
«11000» 12000 «	45	46	47	49	50		51	56	59	62
«12000» 13000 «	45	47	49	50	51		52	57	60	63
«13000» 14000 «	46	48	49	50	51		52	58	61	64
«14000» 15000 «	50	51	52	53	54		56	59	62	65
«15000» 16000 «	51	52	53	54	55		56	60	63	66
«16000» 17000 «	52	53	54	55	56		57	61	64	67
«17000» 18000 «	53	54	55	56	58		58	62	65	68
«18000» 19000 «	54	55	56	57	58		59	Sixty three	66	69
«19000» 20000 «	55	56	57	58	59		60	64	67	70

Table 6

mm

Length forgings	Diameter () or size () adjacent to the ledge
Up to 200	SV. 200 to 235	SV. 235 to 270	SV. 270 to 300	SV. 300 to 335	SV. 335 to 370	SV. 370 to 400	SV. 400 to 435	SV. 435 to 470	SV. 470 to 500
The minimum length achievable ledge or seizure ()
Up to 2000 incl.	150	170	190	210	230	250	270	290	310	330
SV. 2000 to 3000 «	170	190	210	230	250	270	290	310	330	350
«3000» 4000 «	190	210	230	250	270	290	310	330	350	370
«4000» 5000 «	210	230	250	270	290	310	330	350	370	390
«5000» 6000 «	230	250	270	290	310	330	350	370	390	Four hundred ten
«6000» 7000 «	250	270	290	310	330	350	370	390	410	430
«7000» 8000 «	270	290	310	330	350	370	390	410	430	450
«8000» 9000 «	290	310	330	350	370	390	410	430	450	470
«9000» 10000 «	310	330	350	370	390	410	430	450	470	490
«10000» 11000 «	330	350	370	390	410	430	450	470	490	510
«11000» 12000 «	350	370	390	410	430	450	470	490	510	530
«12000» 13000 «	370	390	410	430	450	470	490	510	530	550
«13000» 14000 «	390	410	430	450	470	490	510	530	550	570
«14000» 15000 «	-	430	450	470	490	510	530	550	570	590
«15000» 16000 «	-	-	470	490	510	530	550	570	Five hundred ninety	610
«16000» 17000 «	-	-	-	510	530	550	570	590	610	630
«17000» 18000 «	-	-	-	-	550	570	590	610	630	650
«18000» 19000 «	-	-	-	-	-	590	610	630	650	670
«19000» 20000 «	-	-	-	-	-	-	630	650	670	690

Extension table 6

mm

Length forgings	Diameter () or size () adjacent to the ledge
SV. 500 to 535	SV. 535 to 570	SV. 570 to 600	SV. 600 to 635	SV. 635 to 670	SV. 670 to 700	SV. 700 to 750	SV. 750 to 800	SV. 800 to 835	SV. 835 to 870
The minimum length achievable ledge or seizure ()
Up to 2000 incl.	350	370	390	410	430	450	470	490	510	530
SV. 2000 to 3000 «	370	390	410	430	450	470	490	510	530	Five hundred fifty
«3000» 4000 «	390	410	430	450	470	490	510	530	550	570
«4000» 5000 «	410	430	450	470	490	510	530	550	570	590
«5000» 6000 «	430	450	470	490	510	530	550	570	590	610
«6000» 7000 «	450	470	490	510	530	550	570	590	610	630
«7000» 8000 «	470	490	510	530	550	570	590	610	630	650
«8000» 9000 «	490	510	530	550	570	590	610	630	650	670
«9000» 10000 «	510	530	550	570	590	610	630	650	670	690
«10000» 11000 «	530	550	570	590	610	630	650	670	690	710
«11000» 12000 «	550	570	590	610	630	650	670	690	710	730
«12000» 13000 «	570	590	610	630	650	670	690	710	730	750
«13000» 14000 «	590	610	630	650	670	690	710	730	750	770
«14000» 15000 «	610	630	650	670	690	710	730	750	770	800
«15000» 16000 «	630	650	670	690	710	730	750	770	790	830
«16000» 17000 «	650	670	690	710	730	750	770	790	810	860
«17000» 18000 «	670	690	710	730	750	770	790	810	830	890
«18000» 19000 «	690	710	730	750	770	790	810	830	850	920
«19000» 20000 «	710	730	750	770	790	810	830	850	870	950

Extension table 6

mm

Length forgings	Diameter () or size () adjacent to the ledge
SV. 870 to 900	SV. 900 to 950	SV. 950 to 1000	SV. 1000 to 1050	SV. 1050 to 1100	SV. 1100 to 1150	SV. 1150 to 1200	SV. 1200 to 1300	SV. 1300 to 1350
The minimum length achievable ledge or seizure ()
Up to 2000 incl.	550	570	590	610	630	650	670	690	710
SV. 2000 to 3000 «	570	590	610	630	650	670	690	710	730
«3000» 4000 «	590	610	630	650	670	690	710	730	750
«4000» 5000 «	610	630	650	670	690	710	730	750	770
«5000» 6000 «	630	650	670	690	710	730	750	770	790
«6000» 7000 «	650	670	690	710	730	750	770	790	810
«7000» 8000 «	670	690	710	730	750	770	790	810	830
«8000» 9000 «	690	710	730	750	770	790	810	830	850
«9000» 10000 «	710	730	750	770	790	810	830	850	870
«10000» 11000 «	730	750	770	790	810	830	850	870	890
«11000» 12000 «	750	770	790	810	830	850	870	890	910
«12000» 13000 «	770	790	810	830	850	870	890	910	930
«13000» 14000 «	790	810	830	850	870	890	910	930	950
«14000» 15000 «	830	860	890	920	950	980	1010	1040	1070
«15000» 16000 «	860	890	920	950	980	1010	1040	1070	1100
«16000» 17000 «	890	920	950	980	1010	1040	1070	1100	1130
«17000» 18000 «	920	950	980	1010	1040	1070	1100	1130	1160
«18000» 19000 «	950	980	1010	1040	1070	1100	1130	1160	1190
«19000» 20000 «	980	1010	1040	1070	1100	1130	1160	1190	1220

The end of the table.6

mm

Length forgings	Diameter () or size () adjacent to the ledge
SV. 1350 to 1400	SV. 1400 to 1450	SV. 1450 to 1500	SV. 1500 to 1600	SV. 1600 to 1700	SV. 1700 to 1900
The minimum length achievable ledge or seizure ()
Up to 2000 incl.	730	750	770	800	830	850
SV. 2000 to 3000 «	750	770	790	830	860	890
«3000» 4000 «	770	790	810	860	890	920
«4000» 5000 «	790	810	830	890	920	950
«5000» 6000 «	810	830	850	920	950	980
«6000» 7000 «	830	850	870	950	980	1010
«7000» 8000 «	850	870	890	980	1010	1040
«8000» 9000 «	870	890	910	1010	1040	1070
«9000» 10000 «	890	910	930	1040	1070	1100
«10000» 11000 «	910	930	950	1070	1100	1130
«11000» 12000 «	930	950	970	1100	1130	1160
«12000» 13000 «	950	970	990	1130	1160	1190
«13000» 14000 «	970	990	1010	1160	1190	1220
«14000» 15000 «	1100	1130	1160	1190	1220	1250
«15000» 16000 «	1130	1160	1190	1220	1250	1280
«16000» 17000 «	1160	1190	1220	1250	1280	1310
«17000» 18000 «	1190	1220	1250	1280	1310	1340
«18000» 19000 «	1220	1250	1280	1310	1340	1370
«19000» 20000 «	1250	1280	1310	1340	1370	1400

Note. The end ledges are performing in that case, if the length of the tick before projimo of the ledge is equal to or more than the diameter adjacent to the ledge.