| Cutting Diameter Tolerances | |||||
| End Mill Style | Number of Flutes |
Niagara Cutter Tolerance | Corresponding List Numbers | ||
| Single-End / Double-End Finishers |
All | +.000 / -.002 | STS430, STR430, STB430, STRN430, STBN430, STS430M, STR430M, STB430M, STR440, STB440, STRN440, STBN440, STR440M, STB440M, STS540, STR540, STS540M, STR540M, A245, A245R, AB245, AN245, AN245R, ANB245, A340, AN340, A345, A345R, AN345, AN345R, A345M, S335, SB335, SN335, S545, S545R, S335M, S545M, S645M, C230, C230R, C330, C360, C430, C430R, CB230, CB330, CB430, C230M, C430M, CB230M, CB430M, C330M, CN430M, CD230, CD430, CSD230, CSD430, CSDB230, CSDB430 | ||
| Single-End / Double-End Finishers (Flute Dia <=7/64") |
All | +/- .0005 | C230, CB230, CSD230, CSDB230, C330, CB330, C430, CB430, CSD430, CSDB430, C230M, CB230M, C330M, C430M, CB430M | ||
| Single-End Finishers (NC Tolerance) |
2 & 4 | +.001 / - .000 | CNC230, CNCB230, CNC430, CNCB430 | ||
| Single-End Roughers |
3, 4 & 5 | +.000 / -.003 | AR330, SR420, SR545, SR420M | ||
| Single-End Micro Decimal |
2 & 4 | + /- .0005 | ME230, MES230, MEB230, MESB230, ME430, MES430, MEB430, MESB430 | ||
| Thread Mills | All | +.000 / -.002 | NTM100UN, NTM120UN, NTM160UN, NTM200NPT, NTM300NPTF, NTM400MI | ||
| Composite Cutting Tools | All | +.000 / -.002 | DIACC, DIAEPB, DIAPPB, DIABEB, DIAMFR | ||
| Diamond Coated End Mills | 2 & 4 | +/- .001 | DIA230, DIA430, DIAB230, DIACR430, DIAL230, DIAL430, DIALB230, DIALB430, DIAXR430, DIAXRB430, DIAXRR430, DIAXS430, DIAXSB430, DIAXSR430, DIA230M, DIAB230M, DIA430M, DIAB430M, DIACR430M | ||
| Mold and Die | 6 | +.000 / -.002 | M645, M645R, MZ645, MZ645R, MZ645M, MZR645M | ||
| Mold and Die (Flute Dia < Shank Dia) | 2 | +/- .0005 | MB215, MB215M, MBZ215, MBZ215M | ||
| Mold and Die (Flute Dia = Shank Dia) | 2 | +.000 / -.001 | MB215, MB215M, MBZ215, MBZ215M | ||
| Ball-End | All | Ball radius tolerances: flute dia tolerances / 2 | All | Corner Radius | All | +/- .001 | All Series |
| Shank Diameter Tolerances | |||
| End Mill Style | Niagara Cutter Tolerance | ||
| All Inch Shanks | -.0001 / -.0004 | ||
| All Metric Shanks | h6 | ||
| Length-Of-Cut Tolerances | |||
| End Mill Style | Niagara Cutter Tolerance | ||
| All Except Micro Decimal | +.030 / - 0 | ||
| Micro Decimal .030 Dia and Under | +.002 / -0 | ||
| Micro Decimal .031 Dia and Above | +.005 / -0 | ||
| Overall Length Tolerances | |||
| End Mill Style | Niagara Cutter Tolerance | ||
| All | + .015, +/-.030 | ||
| TIR Condition | |||
| End Mill Style | Cutting Diameter | Niagara Cutter Tolerance | |
| All Except Roughers | .005 thru .030 | 0.0001 Max | |
| .031 thru .060 | 0.0002 Max | ||
| .061 thru .111 | 0.0003 Max | ||
| .112 and above | 0.0005 Max | ||
| Roughers | All | 0.0010 Max | |
| Back Taper | |||
| End Mill Style | Niagara Cutter Tolerance | ||
| All | .0005 Max Back Taper Per Inch permissible. Not to exceed the Cutting Diameter Tolerance. | ||
All dimensions are in inches unless otherwise noted.
