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CAT50 ER16 6" Dual Contact Collet Chuck Tool Holder

In stock

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More Information
Mfg SKU #202-1934
Tool Holder CategoryCollet Chuck
shank sizeCAT50
projection length6
max rpm balanced toG2.5 20000
TIR (inch)0.0001
drawbar thread size1-8UNC
Stop Screw Thread SizeM11 x 1.0
Dual Contact Tool HolderYes
collet seriesER16
collet nut diameter1.1
Collet Nut StyleHex
Maximum Torque Ft/Lb50
Coolant ThroughYes



  • shars cat40 dual contact tool holder

    Mirror Finished

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

  • shars cat40 dual contact  tool holder

    Flange Contact

    Precision mill finished from multi-tasking Mazak machine on the flange face to eliminate the 1/8" gap between flange and spindle nose to minimize vibration

  • shars bt30 dual contact  tool holder

    ER Collet Nut

    No longer having an off-center internal collet ring, this collet nut's internal clamp is designed with balance in mind while it's easy to snap-in snap-out ER collet

Tech Specification

  • Taper Size


  • Collet Series


  • Projection Length


  • Collet Size Range

    0.03125" - 0.375"

  • TIR (at collet face)

    < 0.0001"

  • Max Balanced To

    G2.5 20,000 RPM

  • Coolant Thru


  • Max Torque

    50 ft/Lbs

  • Collet Nut Diameter



  • Dual Contact

    With simultaneous contact on taper and flange face between the spindle and tool holder, dual contact tooling eliminates the 1/8” gap between the flange face and the spindle nose to increase rigidity, minimize vibration, extend cutting tool tool life, and greatly improve workpiece surface finish at aggressive speed & feed


    By utilizing DONE IN ONE capability from Mazak Integrex machine with a second turning spindle, all processes from raw bar stock material to final machining in just one machine to improve machining accuracy and streamline production output.

  • High Torque Collet Nut

    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.

  • SHARS Dual Contact tool holder can only be used on machine center with dual contact spindle
  • Compatible with BIG-PLUS ® spindles.
  • *BIG-PLUS® is a trademark of Daishowa Seiki Kabushiki Kaisha; Big Daishowa Seiki Co., Ltd., Corp. 
    Compatible with BIG-PLUS® spindles, but not licensed.

What’s Included