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Table 310 - Ground Thread
Pulley Tap Dimensions
General Dimensions
DIAMETER
OF TAP
INCHES |
DIMENSIONS - INCHES |
OVERALL
LENGTH
A |
LENGTH OF
THREAD
B |
LENGTH OF
SQUARE
C |
LENGTH OF
SHANK
D |
LENGTH OF
TOLERANCE
T* |
SIZE OF
SQUARE
E |
LENGTH OF
NECK
K |
| 1/4 |
6, 8 |
1 |
5/16 |
.255 |
1-1/2 |
.191 |
3/8 |
| 5/16 |
6, 8 |
1-1/8 |
3/8 |
.318 |
1-9/16 |
.238 |
3/8 |
| 3/8 |
6, 8,20 |
1-1/4 |
7/16 |
.381 |
1-5/8 |
.286 |
3/8 |
| 7/16 |
6, 8 |
1-7/16 |
1/2 |
.444 |
1-11/16 |
.333 |
7/16 |
| 1/2 |
6, 8, 10, 12 |
1-21/32 |
9/16 |
.507 |
1-11/16 |
.380 |
1/2 |
| 5/8 |
6, 8,10, 12 |
1-13/16 |
11/16 |
.633 |
2 |
.475 |
5/8 |
| 3/4 |
10, 12 |
2 |
3/4 |
.759 |
2-1/4 |
.569 |
3/4 |
Tolerances
| ELEMENT |
RANGE |
DIRECTION |
TOLERANCE |
| Length Overall --- A |
1/4" to 3/4" incl. |
Plus or Minus |
1/16" |
| Length of Thread --- B |
1/4" to 3/4" incl. |
Plus or Minus |
1/16" |
| Length of Square --- C |
1/4" to 3/4" incl. |
Plus or Minus |
1/32" |
| Diameter of Shank --- D |
1/4" to 3/4" incl. |
Minus |
.005" |
| Size of Square --- E |
1/4" to 1/2" incl. |
Minus |
.004" |
|
5/8" to 3/4" incl. |
Minus |
.006" |
Formulae (Approximate)
Diameter of Shank "D" = Maximum Major Diameter.
Size of Square = Diameter of Shank "D" x .75 to nearest .001"
Notes
*T is minimum length of shank which is held to eccentricity tolerances.
**Optional with manufacturer.
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