Thread Rolls for the A1 Head

Dimensions
Helix angle in Head = 3° 30'	A	D1	D2	D3	D4	D5 max	L1	L2	P	?
Allowable Component Lead	inches	2.520	0.670	3/4	0.440	2.756	2.360	1.970	0.080	60°
Angle = 2° 5' - 4° 33'	mm	64	17	20	11	70	60	50	2	A
A
The following Thread Rolls may be ordered as standard on the A1 head
A
ISO Metric			Unified Coarse UNC					Whitworth BSW
A
Nominal Size x Pitch mm			Nominal Size x TPI					Nominal Size x TPI
M 6.0 - M 7.0 x 1.0			1/4 x 20					1/4 x 20
M 8.0 - M 9.0 x 1.25			5/16 x 18					5/16 x 18
M 10.0 x 1.5			3/8 x 16					3/8 x 16
			7/16 x 14
A
A
ISO Metric Fine								Whitworth Fine BSF
			Unified Fine UNF
Nominal Size x Pitch mm								Nominal Size x TPI
M 6.0 - M 7.0 x 0.75			Nominal Size x TPI					1/4 x 26
M 8.0 x 1.0			1/4 x 28					5/16 x 22
M 10.0 x 1.25			5/16 - 3/8 x 24					3/8 x 20

Testimonials

"The introduction of Namco thread rolling heads has enabled us to significantly reduce our costs through shorter cycle times, less changeovers and increased quality.

The team at Namco is very knowledgable and has helped us tackle major production challenges"

United Kingdom