Общий каталог Widia 2017 - страница 605

Threading Selection Guide

Step 3 Choose Insert for Application

• See threading insert overview on page F8.

insert catalogue

• Select cresting inserts for fully controlled thread form including TN6025 TN6010

size number diameter control. Cresting inserts eliminate the need for deburring.

• Non-cresting partial profi le inserts can cut a variety of thread pitches. 2 NT-2RK
• Note insert size for toolholder selection. 3 NT-3RK

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 cutting TN6010 TN6010 TN6010 TN6010

conditions 160–750 160–600 230–700 65–400

TN6025 TN6025 TN6025 TN6025 TN6025

fi rst choice

130–650 130–450 200–475 160–1150 35–330

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 thread insert: NA3L8

material: alloy steel grade: 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.