Общий каталог Sumitomo 2018 - 2019 - страница 44

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New NGH Type

For Hardened Steel Turning

General Features

Enables medium roughing of hardened steel in combination with

coating and grade AC503U.

Reduces heat generation and enables deep cutting (ap = 1 ~ 3mm)

of hardened steel by using a wide neutral ground chipbreaker (rake

angle: 4°) and sharp edge. Discharges chips smoothly.

Negative Insert for Rough Cutting NGH Type Chipbreaker

Performance

NGH Type Chipbreaker Low Cutting Force Without Chipbreaker Insert

0 200 400 600 800 1000

Cutting Resistance (N) Application Examples

NGH Type Chipbreaker

Only minor wear occured after Stable chip forming 40min cutting

Without Chipbreaker Insert

Major wear occured after 20min cutting

Recommended Cutting Conditions

Back Force Feed Force Principal Force

Work Material: X155CrVMo12-1 (61HRC) Insert: TNGG 160404 NGH (AC503U) Cutting Conditions: vc=50m/min, f=0,05mm/rev, a p=3,0mm, Dry

ApplicationCutting SpeedFeed RateDepth of CutRecommended
Rangevc(m/min)f (mm/rev)ap (mm)Chipbreaker
Finishing40 ~ 1000,02 ~ 0,10Without chipbreaker insert
Medium Roughing20 ~ 600,02 ~ 0,051 ~ 3NGH Type

Work Material: Hardened steel (50 ~ 62HRC), X155CrVMo12-1, X40CrVMo5-1, S6-5-2, High-speed powder and high speed steel