BT40 ER40 80mm Collet Chuck Tool Holder

SKU 202-7640

BT40 ER40 80mm Collet Chuck Tool Holder

Availability In stock

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SKU 202-7640
Tool Holder Category Collet Chuck
Brand Tegara
shank size BT40
projection length 80mm
max rpm balanced to G2.5 20000
TIR (inch) 0.0001
drawbar thread size M16x2.0
Stop Screw Thread Size M28 x 1.5
Dual Contact Tool Holder No
collet series ER40
collet chuck style standard
collet nut diameter 2.48
Collet Nut Style Slotted
Maximum Torque Ft/Lb 140
Coolant Thru Thru Spindle & DIN-B Flange
Full Details


  • shars bt40 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 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


  • Collet Series


  • Projection Length


  • Collet Size Range

    0.125" - 1.0"

  • TIR (at collet face)

    < 0.0001"

  • Max Balanced To

    G2.5 20,000 RPM

  • Coolant Type

    Thru Spindle

  • Max Torque

    140 ft/Lbs

  • Collet Nut Diameter


Product Spotlight

  • 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.

  • High Torque Collet Nut

    The maximum torque is laser marked on the ER collet nut face to take the guess game out of the way to ensure proper amount of force should be applied while tightening. Innovative coating process significantly increases the clamping force by 75% compared to standard ER collet nut. More gripping force provides better rigidity and reduces the possibility of losing grip on the round shank which lead to expensive damage on cutting tools and work piece material.

  • Asymmetrical O-Ring

    Internal clamping ring's shape is design to minimize out-of-balance compare to the standard off-center o-ring design from other standard ER collet nut, achieving 12,000 RPM without needed to drill holes on the collet nut body when placed on a dynamic balanced machine to preserve ER collet nut's body strength.