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Insert Cutter Radius Compensation

Manufacturing Engineering and Design

Machining Insert cutters are removable cutting tips, which means they are not brazed or welded to the tool body. Insert cutters can be exchanged, and often also rotated or flipped, without disturbing the overall geometry of the tool (effective diameter, tool length offset, etc.). This saves time in manufacturing by allowing fresh cutting edges to be presented periodically without the need for tool grinding, setup changes, or entering of new values into a CNC program.

Insert Cutter Radius Compensation per. Specification ANSI B212.3
All dimensions are in inches.

Square Profile Insert Cutter
B Style Also applies to R Style		Turning 15° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0035	.0191	.0009	.0110
		1⁄32	.0070	.0383	.0019	.0221
		3⁄64	.0105	.0574	.0028	.0331
		1⁄16	.0140	.0765	.0038	.0442
D Style Also applies to S Style		Turning 45° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0065	.0221	.0065	0
		1⁄32	.0129	.0442	.0129	0
		3⁄64	.0194	.0663	.0194	0
		1⁄16	.0259	.0884	.0259	0
K Style		Facing 15° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0009	.0110	.0035	.0191
		1⁄32	.0019	.0221	.0070	.0383
		3⁄64	.0028	.0331	.0105	.0574
		1⁄16	.0038	.0442	.0140	.0765
Triangle Insert Cutter Profile
G Style		Turning 0° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0114	.0271	0	.0156
		1⁄32	.0229	.0541	0	.0312
		3⁄64	.0343	.0812	0	.0469
		1⁄16	.0458	.1082	0	.0625
B Style Also applies to R Style		Turning and Facing 15° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0146	.0302	.0039	.0081
		1⁄32	.0291	.0604	.0078	.0162
		3⁄64	.0437	.0906	.0117	.0243
		1⁄16	.0582	.1207	.0156	.0324
F Style		Facing 90° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	0	.0156	.0114	.0271
		1⁄32	0	.0312	.0229	.0541
		3⁄64	0	.0469	.0343	.0812
		1⁄16	0	.0625	.0458	.1082
J Style		Turning and Facing 3° Lead Angle
		Rad.	L-1	L-2	D-1	D-2
		1⁄64	.0106	.0262	.0014	.0170
		1⁄32	.0212	.0524	.0028	.0340
		3⁄64	.0318	.0786	.0042	.0511
		1⁄16	.0423	.1048	.0056	.0681

L-1 and D-1 over sharp point to nose radius; and L-2 and D-2 over sharp point to center of nose radius. The D-1 dimension for the B, E, D, M, P, S, T, and V style tools are over the sharp point of insert to a sharp point at the intersection of a line on the lead angle on the cutting edge of the insert and the C dimension. The L-1 dimensions on K style tools are over the sharp point of insert to sharp point intersection of lead angle and F dimensions.