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Technical

DIN tolerances for rubber & plastic parts

Tolerances describe the permissible deviations from the nominal values of a seal. Different DIN tolerances apply to each manufacturing process for rubber and plastic parts. Below you will find the relevant limit deviations for moulded parts, extruded parts, punched parts and sheet material, as well as for cut-in rings to DIN 46320.

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Moulded parts

DIN ISO 3302-1

Sheet material

DIN ISO 7715 T5

Sealing rings

DIN 46320 T1

Tolerance classes

M1-M4, P1-P3

Standards

Relevant standards for tolerances

Different tolerance standards apply depending on the manufacturing process. You will find the specific limit deviations in the tables below.

DIN ISO 3302-1

formerly DIN 7715

Limit deviations for finished parts, i.e. moulded parts and extruded parts.

DIN ISO 7715 Part 5

Tolerances for sheet material, the basis for punched parts. It distinguishes the tolerance classes P1, P2 and P3; DIN 7715 has no class "H1".

DIN 46320 Part 1

Tolerances for cut-out sealing rings.

Moulded parts

Limit deviations for moulded parts

Moulded parts

DIN ISO 3302-1, tolerance classes M1 to M4 (F and C)

Limit deviations Moulded parts, DIN ISO 3302-1, tolerance classes M1 to M4 (F and C)
Nominal dimension Tolerance class
M1		Tolerance class
M2		Tolerance class
M3		Tolerance class
M4
over up to FCFCFCF and C
0 4.0 ± 0.08± 0.10± 0.10± 0.15± 0.25± 0.40± 0.50
4.0 6.3 ± 0.10± 0.12± 0.15± 0.20± 0.25± 0.40± 0.50
6.3 10 ± 0.10± 0.15± 0.20± 0.20± 0.30± 0.50± 0.70
10 16 ± 0.15± 0.20± 0.20± 0.25± 0.40± 0.60± 0.80
16 25 ± 0.20± 0.20± 0.25± 0.35± 0.50± 0.80± 1.00
25 40 ± 0.20± 0.25± 0.35± 0.40± 0.60± 1.00± 1.30
40 63 ± 0.25± 0.35± 0.40± 0.50± 0.80± 1.30± 1.60
63 100 ± 0.35± 0.40± 0.50± 0.70± 1.00± 1.60± 2.00
100 160 ± 0.40± 0.50± 0.70± 0.80± 1.30± 2.00± 2.50
160 - ± 0.3 %± 0.4 %± 0.5 %± 0.7 %± 0.8 %± 1.3 %± 1.5 %
DIN tolerances for moulded parts: table of limit deviations to DIN ISO 3302-1, tolerance classes M1 to M4 (F and C)

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Extruded parts

Limit deviations for extruded parts

Internal dimensions of extruded parts produced on a mandrel

DIN ISO 3302-1, tolerance classes EN1 to EN3

Limit deviations Internal dimensions of extruded parts produced on a mandrel, DIN ISO 3302-1, tolerance classes EN1 to EN3
Nominal dimension Tolerance class
EN1		Tolerance class
EN2		Tolerance class
EN3
over up to
0 4.0 ± 0.20± 0.20± 0.35
4.0 6.3 ± 0.20± 0.25± 0.40
6.3 10 ± 0.25± 0.35± 0.50
10 16 ± 0.35± 0.40± 0.70
16 25 ± 0.40± 0.50± 0.80
25 40 ± 0.50± 0.70± 1.00
40 63 ± 0.70± 0.80± 1.30
63 100 ± 0.80± 1.00± 1.60
100 160 ± 1.00± 1.30± 2.00
160 - ± 0.6 %± 0.8 %± 1.2 %
Tolerances for the internal dimensions of extruded parts produced on a mandrel: table to DIN ISO 3302-1, tolerance classes EN1 to EN3

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External dimensions of ground extruded parts

DIN ISO 3302-1, tolerance classes EG1 and EG2

Limit deviations External dimensions of ground extruded parts, DIN ISO 3302-1, tolerance classes EG1 and EG2
Nominal dimension Tolerance class
EG1		Tolerance class
EG2
over up to
0 10 ± 0.15± 0.25
10 16 ± 0.20± 0.35
16 25 ± 0.20± 0.40
25 40 ± 0.25± 0.50
40 63 ± 0.35± 0.70
63 100 ± 0.40± 0.80
100 160 ± 0.50± 1.00
160 - ± 0.3 %± 0.5 %
Tolerances for the external dimensions of ground extruded parts: table to DIN ISO 3302-1, tolerance classes EG1 and EG2

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Cut lengths of extruded parts

DIN ISO 3302-1, tolerance classes L1 to L3

Limit deviations Cut lengths of extruded parts, DIN ISO 3302-1, tolerance classes L1 to L3
Nominal length Tolerance class
L1		Tolerance class
L2		Tolerance class
L3
over up to
0 40 ± 0.7± 1.0± 1.6
40 63 ± 0.8± 1.3± 2.0
63 100 ± 1.0± 1.6± 2.5
100 160 ± 1.3± 2.0± 3.2
160 250 ± 1.6± 2.5± 4.0
250 400 ± 2.0± 3.2± 5.0
400 630 ± 2.5± 4.0± 6.3
630 1000 ± 3.2± 5.0± 10.0
1000 1600 ± 4.0± 6.3± 12.5
1600 2500 ± 5.0± 10.0± 16.0
2500 4000 ± 6.3± 12.5± 20.0
4000 - ± 0.16 %± 0.32 %± 0.50 %
Limit deviations for cut lengths of extruded parts: table to DIN ISO 3302-1, tolerance classes L1 to L3

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Thickness of cut sections

DIN ISO 3302-1, tolerance classes EC1 to EC3

Limit deviations Thickness of cut sections, DIN ISO 3302-1, tolerance classes EC1 to EC3
Nominal thickness Tolerance class
EC1		Tolerance class
EC2		Tolerance class
EC3
over up to
0.63 1.00 ± 0.10± 0.15± 0.20
1.00 1.60 ± 0.10± 0.20± 0.25
1.60 2.50 ± 0.15± 0.20± 0.35
2.50 4.00 ± 0.20± 0.25± 0.40
4.00 6.30 ± 0.20± 0.35± 0.50
6.30 10.00 ± 0.25± 0.40± 0.70
10.00 16.00 ± 0.35± 0.50± 0.80
16.00 25.00 ± 0.40± 0.70± 1.00
Limit deviations for the thickness of cut sections of extruded parts: table to DIN ISO 3302-1, tolerance classes EC1 to EC3

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Cross-sections of unsupported extruded parts

DIN ISO 3302-1, tolerance classes E1 to E3

Limit deviations Cross-sections of unsupported extruded parts, DIN ISO 3302-1, tolerance classes E1 to E3
Nominal thickness Tolerance class
E1		Tolerance class
E2		Tolerance class
E3
over up to
0 1.5 ± 0.15± 0.25± 0.40
1.5 2.5 ± 0.20± 0.35± 0.50
2.5 4.0 ± 0.25± 0.40± 0.70
4.0 6.3 ± 0.35± 0.50± 0.80
6.3 10.0 ± 0.40± 0.70± 1.00
10.0 16.0 ± 0.50± 0.80± 1.30
16.0 25.0 ± 0.70± 1.00± 1.60
25.0 40.0 ± 0.80± 1.30± 2.00
40.0 63.0 ± 1.00± 1.60± 2.50
63.0 100 ± 1.30± 2.00± 3.20
Tolerances for the cross-section dimensions of unsupported extruded parts: table to DIN ISO 3302-1, tolerance classes E1 to E3

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Punched parts

Limit deviations for punched parts and sheet material

Thickness of calendered sheets

Basis for punched parts, tolerance classes ST1 to ST3

Limit deviations Thickness of calendered sheets, Basis for punched parts, tolerance classes ST1 to ST3
Nominal thickness Tolerance class
ST1		Tolerance class
ST2		Tolerance class
ST3
over up to
0 1.00 ± 0.15± 0.20± 0.25
1.00 1.60 ± 0.15± 0.25± 0.35
1.60 2.50 ± 0.20± 0.35± 0.40
2.50 4.00 ± 0.25± 0.40± 0.50
4.00 6.30 ± 0.35± 0.50± 0.70
6.30 10.00 ± 0.40± 0.70± 0.80
10.00 16.00 ± 0.50± 0.80± 1.00
16.00 - ± 3.5 %± 5 %± 7 %
Tolerances for the thickness of calendered sheets as the basis for punched parts: table with tolerance classes ST1 to ST3

Table as image

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Sheet material for punched parts

DIN ISO 7715 Part 5, tolerance classes P1 to P3

Limit deviations Sheet material for punched parts, DIN ISO 7715 Part 5, tolerance classes P1 to P3
Nominal dimension Tolerance class
P1		Tolerance class
P2		Tolerance class
P3
over up to
0 1.60 ± 0.20± 0.20± 0.40
1.60 4.00 ± 0.20± 0.30± 0.40
4.00 6.30 ± 0.20± 0.40± 0.50
6.30 10.00 ± 0.30± 0.50± 0.60
10.00 25.00 ± 0.30± 0.60± 0.80
25.00 40.00 ± 0.40± 0.80± 1.00
40.00 63.00 ± 0.50± 1.00± 1.50
63.00 100.00 ± 0.60± 1.20± 2.00
100.00 160.00 ± 0.80± 1.40± 2.50
160.00 250.00 ± 1.00± 1.60± 3.00
250.00 400.00 ± 1.60± 2.50± 5.00
400.00 - ± 0.50 %± 0.80 %± 1.50 %
Tolerances for sheet material for punched parts: table to DIN ISO 7715 Part 5, tolerance classes P1 to P3

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Cut-in rings

Tolerances for cut-in sealing rings to DIN 46320 Part 1

Permissible deviations and assignment to cable and wire diameters and the matching PG cable gland. Tolerance on diameters D3, D4 and D5: ±0.5 mm each. All dimensions in mm.

Cut-in rings (onion seals) for cable glands

DIN 46320 Part 1, PG 9 to PG 48

Tolerances for cut-in rings to DIN 46320 Part 1 with usable cable and wire diameters per PG size
Sealing ring dimensions Usable for cable and wire diameters Cable gland
D1D2D3D4D5Sat D2at D3at D4at D5
13.3 ±0.55 ±0.257.510-5.5 ±0.44 to 66.5 to 8.59 to 11- PG 9
16.5 ±0.77.5 ±0.351012.5-6 ±0.56.5 to 8.59 to 1111.5 to 13.5- PG 11
18.3 ±0.77.5 ±0.351012.5-6 ±0.56.5 to 8.59 to 1111.5 to 13.5- PG 13.5
20.4 ±0.77.5 ±0.351012.5157 ±0.56.5 to 8.59 to 1111.5 to 13.514 to 16 PG 16
25.9 ±0.810 ±0.351316198 ±0.59 to 1112 to 1415 to 1718 to 21 PG 21
34.7 ±0.818 ±0.52124279.5 ±0.617 to 1920 to 2223 to 2526 to 28 PG 29
44.7 ±0.824 ±0.527303312 ±0.623 to 2526 to 2829 to 3132 to 34 PG 36
51.7 ±0.830 ±0.733363914 ±0.629 to 3132 to 3435 to 3738 to 40 PG 42
56.9 ±0.936 ±0.739424514 ±0.635 to 3738 to 4041 to 4344 to 46 PG 48
Tolerances for cut-in rings to DIN 46320 Part 1: table with dimensions and cable diameters for PG 9 to PG 48

Table as image

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Example: cut-in ring for a PG 9 cable gland

  • D1 = outer diameter of the sealing ring (PG 9 = 13.3 mm)
  • D2 = inner diameter of the sealing ring (PG 9 = 5 mm)
  • S = cut thickness / height of the sealing ring (PG 9 = 5.5 mm)
  • D3, D4, D5 = diameters of the cut-ins, removable with a knife or by hand (PG 9 = 7.5 / 10 mm)

More on design, materials and versions: cut-in rings from SIEGEL

Technical drawing PG9: hose ring with 13.3 mm outer diameter, 5 mm inner diameter and 5.5 mm height, and cut-in ring PG9 with cut-ins at Ø 7.5 mm and Ø 10 mm

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