BR2P type

Features of BR2P type

Unique insert mounting mechanism and  helical cutting edge for greater cutting efficiency

Proposed solutions

The shape of the helical cutting edge reduces cutting resistance, suppresses chattering by mitigating impact on contact with the cutting edge, and helps prevent a rapid increase in cutting resistance.

Cutting conditions Work material : S50C（220HB） Machine : Vertical type（BT50） Tool  BR2P type  Cutter : BR2P3043S32-200-100  Insert : ZPET150R-B JP4120  Cutting speed：Vc =200m/min  Revolution：n =2122min-1　 Feed per tooth : fz=0.2mm/t Feed speed：Vf =849mm/min Radial depth of cut : ap×ae=15×0.5mm Overhang : 120mm Air

The helical shape of the cutting edge results in improved tool life for BR2P than conventional products by suppressing chattering vibration.		Cutting conditions Work material : SKD61(45HRC) Slant angle: 5° Machine : Vertical type（BT50） Tool  BR2P type  Cutter : BR2P3043S32-200-100  Insert : ZPET150R-B JP4120  Cutting speed：Vc =200m/min  Revolution：n =2122min-1　 Feed per tooth : fz=0.3mm/t Feed speed：Vf =1273mm/min Radial depth of cut : ap×ae=3×3mm Overhang : 120mm Air
After six hours of cutting : Normal wear	After an hour of cutting : Severely damaged; almost completely consumed

Proposed solutions

A non-penetrating groove on the bottom surface of the main cutting edge secures cutting edge strength. (The bottom surface of the main cutting edge receives the greatest cutting resistance.) In addition, a penetrating groove on the constraint surface of the main cutting edge maintains high positioning accuracy.

Conventional products require two types of inserts (a main insert and a sub insert ). In contrast, BR2P uses a single integrated insert for improved handling.

Proposed solutions

The BR2P enables smooth cutting of overlay welding materials with variable cutting depths because the helical cutting edge suppresses cutting resistance even as cutting depth increases.

Cutting conditions Work material : Nodular cast irons  +TM-2000 ＊1  Machine :Vertical type （BT50）　 Tool Cutter : BR2P30S32-160-80 Insert : ZPET150R-C JP4120 Cutting speed : V c=100m/min Revolution : n=1070min-1 Feed per tooth : f z=0.17mm/t Feed speed : V f=370mm/min Radial depth of cut : ap×ae=3×1mm Overhang : 80mm Air ＊1 TM-2000 is a product name of Tokai Yogyo Co., Ltd.

The BR2P has coolant holes for all diameters of the modular and shank types (except MT shank). The internal coolant improves the chip evacuation, reducing chip biting.

Proposed solutions

 Large φ40 and φ50 tools are available for the BR2P. In addition, improved body and insert rigidity helps suppress chipping.

Increasing the body center thickness improves the rigidity of the body. Increasing the insert thickness enables to suppress sudden chipping under higher efficiency machining.

Cutting conditions Work material : S50C（220HB） Machine : Vertical type （BT50）　 Tool Cutter : BR2P5063C508-200-120 Insert : ZPET250R-N  JP4120 Cutting speed : V c=250m/min Revolution : n=1592min-1 Feed per tooth : f z=0.23mm/t Feed speed : V f=732mm/min Radial depth of cut : ap×ae=25×15mm Air

Using a φ50 nicked insert, the BR2P reduces cutting resistance compared to conventional products.

Cutting conditions Work material : S50C（220HB） Machine : Vertical type （BT50）　 Tool Cutter : BR2P5063C508-200-120 Insert : ZPET250R-N  JP4120 Cutting speed : V c=141m/min Revolution : n=900min-1 Feed per tooth : f z=0.17mm/t Feed speed : V f=300mm/min Radial depth of cut : ap×ae=25×1mm Air