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More Information
Mfg SKU #202-7123
Tool Holder CategoryEnd Mill Holder
BrandShars Tool
shank sizeCAT40
Bore Diameter7/16
projection length2.5
end mill holder stylestandard
max rpm balanced to12000
TIR (inch)0.0001
drawbar thread size5/8x11UNC
Nose Diameter1.25
Dual Contact Tool HolderNo
Coolant ThroughYes

Design

Craftmanship

  • shars cat40 tool holder

    AT3 or Better

    Taper ground to AT3 or better ensures 80% or more contact with spindle to reduce harmonics and improve runout tolerance

  • shars cat40 tool holder

    Pilot Contact

    Inside bore are precision turned to engage a better contact with retention knob's pilot to increase rigidity

  • shars cat40 tool holder

    Taper End Face

    Precision turning surface finish provide perpendicular contact with the flange of retention knob to increase rigidity

Tech Specification

  • Taper Size

    CAT40

  • Bore Diameter

    7/16"

  • Projection Length

    2.50"

  • Bore Tolerance

    H6

  • TIR (at nose face)

    < 0.0001"

  • Max Balanced To

    12,000 RPM

  • Coolant Type

    Thru Spindle

  • Rear Thread Size

    5/8-11

  • Nose Diameter

    1.25"

Spotlight

  • Pre-Balance Design

    Unique design feature in the extension nose to minimize the off-balance nature of CAT 40 taper specification. On the side of flange where a half spherical hole is located, a flat is cut into the cylinder nose to compensate the weight of the metal chips lost from forming this spherical hole. This design achieves a nearly even weight distribution in its upright position, like the position inside a machine spindle. Evenly weight distribution will minimize centrifugal force in high speed spinning and thus maximize the holder's ability to hold the cutting tool concentric to spindle rotation.

  • Mirror Finish



    To achieve AT3 or better taper contact as an industry standard, our taper surface are precision ground on Shigiya CNC grinder from Japan. We are not satisfied with just meeting the industry standard, the surface roughness on the taper is maintained to mirror finish.

  • Flange and V-groove are precision ground to ensure reliable tool change
  • Spindle Thru coolant capability

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