GUHRING - Каталог Метчики - 2011 EN
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5NIVERSAL!PPLICATIONS
!LLOYED5NALLOYED3TEELS
ANSI length - ANSI shank UNC /
UNF
Series 3954 - Cobalt, UNC, 40° helix, TiN coated, axial coolant through
2B
Size No. Shank dia. Square Size Overall 2B Series Order Class of Fit Cut Taps
1/4-20 Length
5/16-18 Flutes inch inch Approx. 3954 No. Blind Hole
3/8-16 3 0.255 0.191 inch z 6.350
7/16-14 3 0.318 0.238 2.500 Limits z 7.938
1/2-13 3 0.381 0.286 2.720 H4/H5 z 9.525
5/8-11 3 0.323 0.242 2.941 H4/H5 z 11.113
3/4-10 3 0.367 0.275 3.157 H5/H6 z 12.700
4 0.480 0.360 3.381 H5/H6 z 15.875
4 0.590 0.442 3.811 H5/H6 z 19.050
4.252 H5/H6
H5/H6
40° Helix
ANSI length - ANSI shank Semi-bottoming
Chamfer Lead
Series 3955 - Cobalt, UNF, 40° helix, TiN coated, axial coolant through
C · 2-3
Size No. Shank dia. Square Size Overall 2B Series Order
1/4-28 Length
5/16-24 Flutes inch inch Approx. 3955 No.
3/8-24 3 0.255 0.191 inch z 6.350
7/16-20 3 0.318 0.238 2.500 Limits z 7.938
1/2-20 3 0.381 0.286 2.720 H3/H4 z 9.525
5/8-18 3 0.323 0.242 2.941 H3/H4 z 11.113
3/4-16 3 0.367 0.275 3.157 H3/H4 z 12.700
4 0.480 0.360 3.381 H4/H5 z 15.875
4 0.590 0.442 3.811 H4/H5 z 19.050
4.252 H4/H5
H5/H6
Refer to pages 142-145 for additional dimensional information
O 53!3TOCK P )NTERNATIONAL3TOCK
WKS 7HENORDERING%$0NO 3ERIES /RDERNOIE 49
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