A technical drawing of a helical back rake boring bar without a flat. Print includes dimensional callouts.

Helical Back Rake Boring Bars without Flat

Achieve superior performance with our helical back rake boring bars, designed without a flat for versatile toolholding options. The positive high shear tool design reduces cutting force, ensuring smoother machining and enhanced efficiency in your operations. Made from premium submicron grade carbide, these boring bars deliver exceptional durability and strength for demanding applications. Stocked in both uncoated and coated versions, the AlTiN+ coating provides superior wear resistance, extending tool life for longer-lasting performance. Whether for high-precision or high-speed machining, these boring bars are engineered to meet your toughest requirements with precision and reliability.

A (Minimum Bore)
B (Maximum Depth)
S (Shank Diameter)
OAL
Tool #Uncoated EDP #AlTiN+ EDP #
0.0250.0930.1251.50HB25215916216192
0.0270.1250.1251.50HB27215922216198
0.0310.1560.1251.50HB31215928216204
0.0310.1870.1251.50HB31L215934216210
0.0360.1560.1251.50HB36215940216216
0.0360.2500.1251.50HB36L215946216222
0.0420.2500.1251.50HB42215952216228
0.0420.3120.1251.50HB42L215958216234
0.0520.3120.1251.50HB52215964216240
0.0570.3120.1251.50HB57215970216246
0.0600.3750.1251.50HB60215976216252
0.0600.5000.1251.50HB60L215982216258
0.0700.4370.1251.50HB70215988216264
0.0800.5000.1251.50HB80215994216270
0.0850.5000.1251.50HB85216000216276
0.0900.5000.1251.50HB90216006216282
0.0900.6250.1251.50HB90L216012216288
0.1000.5620.1251.50HB100215880216156
0.1000.6250.1252.00HB100L215886216162
0.1100.5620.1251.50HB110215892216168
0.1100.6250.1252.00HB110L215898216174
0.1150.6250.1251.50HB120215904216180
0.1150.6250.1252.00HB120L215910216186