Общий каталог Widia 2017 - страница 605

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Threading Selection Guide

• Select cresting inserts for fully controlled thread form including diameter control. Cresting inserts eliminate the need for deburring.insert sizecatalogue numberTN6025TN6010
• Non-cresting partial profi le inserts can cut a variety of thread pitches.2NT-2RK��
• Note insert size for toolholder selection.3 4NT-3RK NT-4RK� �� �

4 NT-4RK

Step 4 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

chip control chip control

insert style neutral positive positive

or neutral or positive

optimum cuttingTN6010TN6010TN6010TN6010
conditions160–750160–600230–70065–400
TN6025TN6025TN6025TN6025TN6025
fi rst choice
130–650130–450200–475160–115035–330

Examples:

Chip Control: NT-K or NT-CK (partial profi le only)

Neutral: NT, NT-C, NTF, NTC, NJ, NJF, NDC-V, NA, NDC, NTB-A/B

Positive: NTP, NTK, NJP, NJK

TopThread Threading Example:

application:8 TPI Acme internal Recommendation:
right-hand threadinsert: NA3L8
material: alloy steelgrade: TN6010

workpiece diameter: 114,3mm insert size: 3

good cutting conditions feed towards the chuck boring bar: A40NER3 gage insert: N.3L speed: 150 m/min

infeed passes*: 12 passes

* Infeed recommendations provided in technical data section on pages F88–F91.