Thread Rolls for the A3 Head
|
Dimensions
|
|
Helix angle in Head = 2° 40'
|
A |
D1
|
D2
|
D3
|
D4
|
D5 max
|
L1
|
L2
|
P
|
?
|
|
Allowable Component Lead
|
inches
|
4.600
|
1.500
|
1.25 / 1.5
|
0.870
|
5.157
|
3.540
|
3.270
|
0.160
|
60°
|
|
Angle = 1° 35' - 3° 30'
|
mm
|
117
|
38
|
30 / 40
|
22
|
131
|
89
|
83
|
4
|
A |
| A |
|
|
|
|
|
|
|
|
|
|
|
The following Thread Rolls may be ordered as standard on the A3 head
|
| A |
|
|
|
|
|
|
|
|
|
|
|
ISO Metric
|
|
|
Unified Coarse UNC
|
|
|
Whitworth BSW
|
| A |
|
|
|
|
|
|
|
|
|
|
|
Nominal Size x Pitch mm
|
|
|
Nominal Size x TPI
|
|
|
Nominal Size x TPI
|
|
M 12.0 - M 14.0 x 1.75
|
|
|
7/16 x 14
|
|
|
7/16 x 14
|
|
M 14.0 - M 16.0 x 2.0
|
|
|
1/2 x 13
|
|
|
1/2 - 9/16 x 12
|
|
M 18.0 - M 20.0 x 2.5
|
|
|
9/16 x 12
|
|
|
5/8 - 11/16 x 11
|
|
M 20.0 - M 22.0* x 2.5
|
|
|
5/8 x 11
|
|
|
3/4 x 10
|
|
|
|
3/4 x 10
|
|
|
7/8* - 15/16* x 9
|
|
|
|
7/8* x 9
|
|
|
|
|
|
| A |
|
|
|
|
|
|
|
|
|
|
|
ISO Metric Fine
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whitworth Fine BSF
|
|
Nominal Size x Pitch mm
|
|
|
Unified Fine UNF
|
|
|
|
|
|
|
M 12.0 - M 14.0 x 1.5
|
|
|
|
|
|
|
|
Nominal Size x TPI
|
|
M 14.0 - M 16.0 x 1.5
|
|
|
Nominal Size x TPI
|
|
|
7/16 x 18
|
|
M 18.0 - M 20.0 x 2.0
|
|
|
7/16 - 1/2 x 20
|
|
|
1/2 - 9/16 x 16
|
|
M 20.0 - M 22.0* x 2.0
|
|
|
9/16 - 5/8 x 18
|
|
|
5/8 - 11/16 x 14
|
|
|
|
|
|
|
|
|
3/4 x 12
|
|
|
|
|
|
|
|
|
7/8* - 15/16* x 11
|
|
|
|
|
|
|
|
|
A |
|
|
|
|
|
|
|
|
|
|
A |
|
|
|
|
|
|
|
|
|
|
A |
|
|
|
|
|
|
|
|
|
|
Whitworth Pipe BSP
|
|
|
|
|
|
|
|
|
A |
|
|
|
|
|
|
|
|
|
|
Nominal Size x TPI
|
|
|
|
|
|
|
|
|
G 1/4 x 19
|
|
|
|
|
|
|
|
|
G 1/2 x 14
|
|
|
|
|
|
|
|
|
|
|
|
|
* For short threads up to 0.945" length including thread run out.
|
|
