RUBBER
• Terminology
•
Drawing Designation
•
Compound Guide
•
Performance Comparison
•
General Applications
THERMOPLASTIC
• Performance Comparison
A
| SUMMARY OF RMA DRAWING DESIGNATIONS |
Dimensional
Tolerances (Tables 2-5) |
Relative
Dimensions |
Finish (Table 6) |
Flash Extension (Table 7) |
Bonding
(Specify Grade and Method on B1 and B2) (Tables 8 & 9) |
Load-Deflection Characteristic (Specify only when needed) (Table
10) |
Packaging |
A1 |
No Designation. SEE TEXT AND OR YOUR RUBBER SUPPLIER. SPECIFY ONLY WHEN NEEDED. |
F1 |
T.00mm T.000 |
B1 |
D1 |
P1 |
A2 |
F2 |
T.08mm
T.003 |
B2 |
D2 |
P2 |
|
A3 |
F3 |
T.40mm T.16 |
B3 |
D3 |
P3 |
|
A4 |
F4 |
T.80mm T.32 |
B4 |
-- |
-- |
|
-- |
-- |
T1.60mm T.63 |
B5 |
-- |
-- |
|
-- |
-- |
T2.35mm T.93 |
-- |
-- |
-- |
|
-- |
-- |
T.00
T.00 |
-- |
-- |
-- |
|
RMA DRAWING DESIGNATION FOR FINISH |
Drawing Designation |
|
F1 |
A
smooth, polished and uniform finish completely free of tool marks,
dents, nicks and scratches, as produced from
a highly polished steel mold. In areas where F1 is specified, the
mold will be polished to a surface finish of 10 micro-inches (250nm)
or better. |
F2 |
A uniform finish as produced from a polished steel
mold. In areas where F2 is specified, the mold will be polished to
a surface finish of 32 micro-inches (800nm) or better but with very
small tool marks not polished out. |
F3 |
Surface
of the mold will conform to good machine shop practice and no micro-inch
finish will be specified. This is "Commerce
Finish" |
F4 |
Satin Finish |
|
RMA DRAWING DESIGNATION FOR FLASH EXTENSION |
Drawing
Designation |
|
T.00mm |
(T.000)
No flash permitted on area designated. (Standard notation regarding
other surfaces must accompany this notation.)
|
T.08mm |
(T.003)
This tolerance will normally require buffing, facing, grinding,
or a similar operation.
|
T.40mm |
(T.016) This tolerance will normally require precision
die trimming, buffing or extremely accurate trimming.
|
T.80mm |
(T.032)
This tolerance will normally necessitate die trimming, machine
trimming, tumbling, hand trimming, or tear
trimming.
|
T1.60mm |
(T.063) This tolerance will be the normal tear trim tolerance. |
T2.35mm |
(T.093) This tolerance will normally require die trimming, tear trimming, or hand trimming of some type |