Dimensions

Helix angle in Head = 4°

D1

D2

D3

D4

D5 max

L1

L2

P

?

Allowable Component Lead

inches

1.970

0.453

3/4

0.260

2.146

1.970

1.520

0.080

50°

Angle = 2° 25' - 5° 12'

mm

50

11.5

20

6.5

54.5

50

39

2

The following Thread Rolls may be ordered as standard on the A0 head

ISO Metric

Unified Coarse UNC

Whitworth BSW

Nominal Size x Pitch mm

Nominal Size x TPI

Nominal Size x TPI

M 1.4 x 0.3

No. 1 x 64

1/16 x 60

M 1.6 - M 1.8 x 0.35

No. 2 x 56

3/32 x 48

M 2.0 - M 2.3 x 0.4

No. 3 x 48

1/8 x 40

M 2.2 - M 2.6 x 0.45

No. 4 - No. 5 x 40

5/32 x 32

M 2.5 - M 3.0 x 0.5

No. 6 - No. 8 x 32

3/16 - 7/32 x 24

M 3.0 - M 3.5 x 0.6

No. 10 - No. 12 x 24

M 4.0 x 0.7

M 4.0 - M 4.5 x 0.75

M 5.0 x 0.8

Whitworth Fine BSF

M 5.0 - M 5.5 x 0.9

Unified Fine UNF

Nominal Size x TPI

Nominal Size x TPI

3/16 x 32

No. 0 x 80

7/32 x 28

No. 1 x 72

No. 2 x 64

No. 3 x 56

No. 4 x 48

No. 5 x 44

No. 6 x 40

No. 8 x 36

No. 10 x 32

No. 12 x 28