Page 237 - Fanar

Technical Information i

Length of full solid cones for selected types of thread (Length of stepped cone Lnak=1.8 mm)

M MF
M1 0,6 M2,5 x 0,35 1,9
M1,2 0,8 M2,6 x 0,35 1,9
M1,4 1,0 M3 x 0,35 1,3
M1,6 1,1 M 3,5 x 0,35 1,6
M1,7 1,1 M4 x 0,5 1,8
M1,8 1,3 M5 x 0,5 2,3
M2 1,4 M6 x 0,75 2,6
M2,5 1,8 M7 x ,75 3,1
M2,6 1,8
M3 1,3
M3,5 1,5
M4 1,7
M4,5 1,9
M5 2,1
M6 2,5
M7 3,0
UNC UNF
No 4-40 2,0 No 4-48 2,1
No 5-40 1,3 No 5-44 1,4
No 6-32 1,4 No 6-40 1,5
No 8-32 1,8 No 8-36 1,8
No 10-24 2,0 No 10-32 2,1
No 12-24 2,3 No 12-28 2,3
1/4-20 2,6 1/4 - 28 2,8
5/16-18 3,3 5/16 - 24 3,5
BSW BSF
1/8 - 40 1,25 1/4 - 26 2,65
3/16 - 24 1,8 5/16 - 22 3,4
1/4 - 20 2,55
5/16 - 18 3,25

4.7. Application of Tools with Internal Channels for Supplying a Coolant IK/IKR

IK - Central cooling channel is recommended for the blind holes, facilitates chip evacuation of chips toward the
shank, improves lubrication and cooling conditions, extends tool life

IKR - Central cooling channel divided into several radial channels, which supply coolant into each of the chip
flutes separately. The solution is recommended for tapping of the through holes, facilitates evacuation of
chips in the direction of feed, improve lubrication and cooling conditions, extends tool life.

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