BT40 5/16" x 2.50" End Mill Tool Holder

SKU 202-7146G

BT40 5/16" x 2.50" End Mill Tool Holder

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Regular Price: $61.50

Online Price Only $48.40

SKU 202-7146G
Tool Holder Category End Mill Holder
shank size BT40
Bore Diameter 5/16
projection length 2.5
end mill holder style stub
max rpm balanced to G2.5 20000
TIR (inch) 0.0002
drawbar thread size M16x2.0
Nose Diameter 0.88
Dual Contact Tool Holder No
Full Details

Section 03

  • shars bt40 ER 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

Section 04

  • Taper Size

    BT40

  • Bore Diameter

    5/16"

  • Projection Length

    2.50"

  • Bore Tolerance

    H6

  • TIR (at nose face)

    < 0.0001"

  • Max Balanced To

    G2.5 20,000 RPM

  • Coolant Type

    Thru Spindle

  • Rear Thread Size

    M16x2.0

  • Nose Diameter

    0.88"

Product Spotlight

  • Dynamic Balancing

    Tool holder is balanced to G2.5 20,000 RPM on a HAIMER Tool Dynamic Balancing System from Germany.  Balanced tool holder minimizes the centrifugal forces which minimize the stress on spindle bearing, minimize vibration and maximize the cutting tool's life cycle and greatly improve surface finish. 

  • 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

What's Included

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