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More Information
Mfg SKU #202-6926
Tool Holder CategoryScrew-In Threaded Holder
shank sizeBT30
Cutting Head Connection Thread Pitch MM8 x 1.25
Internal Thread Depth20mm
Pilot Diameter8.5mm
Pilot Depth7mm
projection length1
max rpm balanced toG2.5 20000
TIR (inch)0.0001
drawbar thread sizeM12x1.75
Nose Diameter0.605
Dual Contact Tool HolderNo



  • shars cat40 ER tool holder

    Mirror Finished

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

  • shars cat40 tool holder

    Pilot Contact

    Inside bore are precision ground to engage a better contact with indexable cutter'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


  • Internal Thread Pitch

    M8 x 1.25

  • Internal Thread Depth


  • Pilot Diameter


  • Pilot Depth


  • Nose Diameter


  • Coolant Type

    Thru Spindle

  • Runout

    .0001" from taper to pilot bore

  • Max Balanced To

    G2.5 20,000 RPM


  • This tool holder accepts all threaded screw-in indexable mililng cutter which are often called modular indexable tooling, screw in or threaded shank cutter
  • Precision ground flat on the shoulder and internal pilot diameter that will self center the threaded indexable cutter
  • By accepting right-hand thread cutter into the tool holder, apply cutting force onto the cutter would increase the bond between the cutter and the tool holder
  • Runout is less than .0001" from taper to pilot bore
  • Made from alloy steel hardened to 54-60 HRc