Chipbreaker Selection Guide Bumpy Breaker Standard Breaker Handed Breaker Break Master (CBN/PCD) For Chamfering Negative Type Rough Cutting HG type PMKNSH MP type PMKNSH HP type PMKNSH Breaker for heavy cutting Single-sided breaker for Breaker for heavy cutting with excellent chip control rough cutting with low cutting with strongest cutting edge Rough-Heavy Cutting 0.4 22° force 0.30.6 22° 0.3 22° B Relief angle 0° CNMM1606 ○○ type Relief angle 0° CNMM1606 ○○ type Relief angle 0° CNMM1606 ○○ type C D R S T V W C D R S T V W C D R S T V W Inserts HU PMKNSH HW P M K N S H HF type PMKNSH t ype Strong edge type breaker for heavy type Two step breaker for heavy cutting Strong edge type breaker for heavy cutting with excellent chip control with excellent chip control cutting with excellent chip control even in high speed machining 3.2 4.5 6.3 0.6 0.2 0.4 0.25 0.3 0.75 20° 17° 15° 0° -15° 16°SNMM2507 ○○ type -15° Relief angle Relief angle 0° SNMM3109 ○○ type Relief angle 0° SNMM1906 ○○ type C C D R S T V W C D R S T V W C D R S T V W Negative Type For Aluminum Alloy D AX type PMKNSH Finishing Parallel breaker for cutting aluminum alloys with excellent cutting performance 2.5 R 30° Relief angle 0° CNGG1204 ○○ type C D R S T V W S Negative Type For Hardened Steel GH type PMKNSH Finishing Breaker for cutting hardened T steel with low cutting force and excellent chip control 3° 3.5 Relief angle 0° CNGG1204 ○○ type V C D R S T V W Negative Type Chamfering W C type PMKNSH Chamfering General purpose ground type breaker Ceramic Solid CBN 0.15 2.15 14° Relief angle 0° SNGG1204 ○○ type C D R S T V W Work material: P Steel M Stainless steel K Cast iron N Non-ferrous metal S Exotic alloy H Hardened steel Chipbreaker Application Range Rough to Heavy Cutting Rough to Heavy Cutting Rough to Heavy Cutting For Aluminum Alloy For Hardened Steel (Inscribed circle φ15.875 to 19.05 mm) (Inscribed circle φ25.4 mm) (Inscribed circle φ31 mm) (mm) 15 (mm) 15 (mm) 30 (mm) 4 N (mm) 4 H HF type HF type HU type HW type HF type HP type HU type HW type GH type cut 10 cut 10 cut 20 cut AX type cut of HG type of HP type of of 2 of 2 Depth MP type Depth MP type Depth Depth Depth 5 5 10 Without breaker Note:The maximum cutting depth for SNGG is 3.5mm 0 0.4 0.8 1.2 0 0.4 0.8 1.2 0 0.6 1.2 1.8 0 0.1 0.3 0.5 0 0.05 0.1 Feed rate (mm/rev) Feed rate (mm/rev) Feed rate (mm/rev) Feed rate (mm/rev) Feed rate (mm/rev) The chipbreaker application ranges above show reference values. Actual values may vary depending on the part number. For details, see the stock information in the following chapters. B10