Tableau des tolérances de la RMA

La Rubber Manufacturers Association (RMA) a développé des tableaux de tolérances afin de permettre aux utilisateurs et aux fournisseurs de toutes les industries de communiquer. Ces tableaux sont utiles lors de la conception et de la production d’une pièce. Vous pouvez également consulter l’article de la RMA sur les facteurs qui touchent les tolérances de produits de caoutchouc moulé.

 

• Facteurs ayant un impact sur la tolérance – RMA
• Tolérance des pièces moulées - RMA

• Tolérance métrique (mm)
• Tolérance pouces (po)

• Tolérances d’extrusion de la RMA

• Tableau 12.
  Summary of RMA Drawing Designations Extended Rubber Products
• Tableau 13.
  Standard Cross-Sectional Tolerance
• Tableau 16.
  Cut Length tolerance for unspliced extrusion
• Tableau 18.
  Spliced Length Tolerances
• Tableau 20.
  Tolerances on Internal Dimensions of Mandrel-Supported Extrusions

Tolérance métrique (mm)

Dimension nominale		A1		A2		A3		A4
Au-dessus de	Jusqu'à et incluant	Fixe	Fermeture	Fixe	Fermeture	Fixe	Fermeture	Fixe	Fermeture
0	10	0.1	0.13	0.16	0.2	0.2	0.32	0.32	0.8
10	16	0.13	0.16	0.2	0.25	0.25	0.4	0.4	0.9
16	25	0.16	0.2	0.2	0.32	0.32	0.5	0.5	1
25	40	0.2	0.25	0.32	0.4	0.4	0.63	0.63	1.12
40	63	0.25	0.32	0.4	0.5	0.5	0.8	0.8	1.25
63	100	0.32	0.4	0.5	0.63	0.63	1	1.1	1.4
100	160	0.4	0.5	0.63	0.8	0.8	1.25	1.25	1.6
160 & plus (Multiplié par)				x .004	x .005	x .005	x .008	x .008	x .010

Tolérance pouces (po)

Dimension nominale		A1		A2		A3		A4
Au-dessus de	Jusqu'à et incluant	Fixe	Fermeture	Fixe	Fermeture	Fixe	Fermeture	Fixe	Fermeture
0	0.40	0.004	0.005	0.006	0.008	0.008	0.013	0.013	0.032
0.40	0.63	0.005	0.006	0.008	0.010	0.010	0.016	0.016	0.036
0.63	1.00	0.006	0.006	0.010	0.013	0.013	0.020	0.020	0.040
1.00	1.60	0.008	0.010	0.013	0.016	0.016	0.025	0.025	0.045
1.60	2.50	0.010	0.013	0.016	0.020	0.020	0.032	0.032	0.050
2.50	4.00	0.013	0.016	0.020	0.025	0.025	0.040	0.040	0.056
4.00	6.30	0.016	0.020	0.025	0.032	0.032	0.050	0.050	0.063
6.30 & plus (Multiplié par)				x .004	x .005	x .005	x .008	x .008	x .010

Table 12. Summary of RMA Drawing
Designations Extended Rubber Products

RMA Class	Dimensional Tolerance* Table 13	CutLength Tolerance* Table 16	SplicedLength Tolerance* Table 16	MandrelCured* Table 20
1	E1	L1	S1	EN1
2	E2	L2	S2	EN2
3	E3	L3	S3	EN3
4	-	-	-	-

Table 13. Standard Cross-Sectional Tolerance

RMA Class	1 - High Precision 2 - Precision 3 - Commercial
Drawing Designation	E1 E2 E3
Dimensions (in Millimeters)
Above Up to 0 1.5 1.5 2.5 2.5 4.0 4.0 6.3 6.3 10 10 16 16 25 25 40 40 63 63 100	+0.15 +0.25 +0.40 0.20 0.35 0.50 0.25 0.40 0.70 0.35 0.50 0.80 0.40 0.70 1.00 0.50 0.80 1.30 0.70 1.00 1.60 0.80 1.30 2.00 1.00 1.60 2.50 1.30 2.00 3.20
RMA Class	1 - High Precision 2 - Precision 3 - Commercial
Drawing Designation	E1 E2 E3
Dimensions (in Inches)
Above Up to 0 0.06 0.06 0.10 0.10 0.16 0.16 0.25 0.25 0.39 0.39 0.63 0.63 0.98 0.98 1.57 1.57 2.48 2.48 3.94	+0.006 +0.010 +0.015 0.008 0.014 0.020 0.010 0.016 0.027 0.014 0.020 0.031 0.016 0.027 0.039 0.020 0.031 0.051 0.027 0.039 0.063 0.031 0.051 0.079 0.039 0.063 0.098 0.051 0.079 0.126

Table 16. Cut Length tolerance for unspliced extrusion

RMA Class	1 - HighPrecision 2 - Precision 3 - Commercial
Drawing Designation.	L1 L2 L3
Length (in Millimeters)
Above Up to 0 40 40 63 63 100 100 160 160 250 250 400 400 630 630 1000 1000 1600 1600 2500 2500 4000 4000	+0.7 +0.04 +1.6 0.08 1.3 2.0 1.0 1.6 2.5 1.3 2.0 3.2 1.6 2.5 4.0 2.0 3.2 5.0 2.5 4.0 6.3 3.2 5.0 10.0 4.0 6.3 12.5 5.0 10.0 16.0 6.3 12.5 20.0 0.16% 0.32% 0.50%
Length (in Inches)
Above Up to 0 1.6 1.6 2.5 2.5 4.0 4.0 6.3 6.3 10.0 10.0 16.0 16.0 25.0 25.0 40.0 40.0 63.0 63.0 100.0 100.0 160.0 160.0	+0.03 +0.04 +0.06 0.03 0.05 0.08 0.04 0.06 0.10 0.05 0.08 0.13 0.06 0.10 0.16 0.8 0.13 0.20 0.10 0.16 0.25 0.13 0.20 0.40 0.16 0.25 0.50 0.20 0.40 0.63 0.25 0.50 0.80 0.16% 0.32% 0.50%

Table 18. Spliced Length Tolerances

RMA Class	1 - High Precision 2 - Precision 3 - Commercial
Drawing Designation	S1 S2 S3
Millimeters
Above Up to 0 250 250 400 400 630 1000 1600 1600 2500 2500 over	+302 +3.2 +7.1 4.0 7.1 8.0 5.0 8.0 9.0 6.3 9.0 10.0 8.0 10.0 11.2 10.0 11.2 12.3 012.5 12.5 16.0
Inches
Above Up to 0 10 10 16 16 25 25 40 40 63 63 100 100 over	+.13 +.25 +.28 .16 .28 .32 .20 .32 .36 .25 .36 .40 .32 .40 .45 .40 .45 .50 .50 .50 .53

Table 20. Tolerances on Internal Dimensions
of Mandrel-Supported Extrusions

RMA Class	1 - High Precision 2 - Commercial 3 - Non-Critical
Drawing Designation	EN1 EN2 EN3
Nominal Dimensions (in Millimeters)
Above Up to 0 4 4 6.3 6.3 10 10 16 16 25 25 40 40 63 63 100 100 160 160	+0.20 +0.20 +0.35 0.20 0.25 0.40 0.25 0.35 0.50 0.35 0.40 0.70 0.40 0.50 0.80 0.50 0.70 1.00 0.70 0.80 1.30 0.80 1.00 1.60 1.00 1.30 2.00 0.6% 0.8% 1.2%
Nominal Dimensions (in Inches)
Above Up to 0 0.16 0.16 0.25 0.25 0.40 0.40 0.63 0.63 1.00 1.00 1.60 1.60 2.50 2.50 4.00 4.00 6.30 6.30	+0.008 +0.08 +0.014 0.008 0.010 0.016 0.010 0.014 0.020 0.014 0.016 0.028 0.016 0.020 0.032 0.020 0.028 0.040 0.028 0.032 0.051 0.032 0.040 0.063 0.040 0.051 0.079 0.6% 0.8% 1.2%