Общий каталог Widia 2017 - страница 639

Insert Selection Guide

Step 3 Choose Insert for Application

• Select cresting inserts for fully controlled thread form including diameter.
• Cresting inserts eliminate the need for deburring and are optimised

for the best tool life at that pitch. insert size catalogue number TN6025

• Non-cresting partial profi le inserts offer the fl exibility

11 2IRA60

to cut a variety of thread pitches with one insert.

• Note insert size for toolholder selection. 16 3IRAG60

See threading insert overview on page F42.

Step 4 Select Appropriate Shim

Required Information: Select the proper shim: SMYE... for external RH or internal LH

• Thread form (TPI or pitch). SMYI... for internal RH or external LH
• Pitch diameter.
• Helix method (hand of tool, feed direction, hand of thread).
• Number of starts.

RH thread/RH tooling LH thread/LH tooling

LH thread/RH tooling RH thread/LH tooling

If recommended shim is different from shim supplied with toolholder, order shim separately. NOTE: Optimise your threading operation by using the proper infeed angle and the recommended infeed values. See the Technical Section on pages F83–F105. Also see detailed shim selection information on pages F104–F105.

Step 5 Select Grade and Speed

Recommendations for Grade and Speed Selection — m/min workpiece

material steel stainless steel cast iron non-ferrous metals high-temp alloys

insert style precision ground

40–200 (130–650) 40–135 (130–450) 60–145 (200–475) 50–360 (160–1150) 10–100 (35–330)