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GMT 50 Taper ER Collet Chucks

GMT 50 Taper ER Collet Chucks


The high accuracy and wide gripping range of ER collet chucks make them the most versatile and the most popular toolholders in the industry. ER "spring" collets with 8 degree tapers are capable of compressing 0.040", more than any other collet. 


  • Choice of Electroless Nickel Plating or Black Oxide Finish
  • Precision ground collet nut threads
  • Concentricity < 0.0001" at the collet taper
  • Tapers and flange hardened to 55 HRC
  • All CAT40 chucks balanced to G2.5 @ 20,000RPM

Standard Nuts

  • CAT40-ER16-250
  • All ER25 and ER32 Chucks
  • Thicker wall, higher torque capacity
  • Use Standard (STD) wrenches

Slim (Castle) Nuts

  • CAT40-ER16-250S
  • CAT40-ER16-400S
  • R8-ER16S
  • Added clearance / 0.5" diameter
  • Use ER16-SLIM wrenches

NEW CAT50 Double Contact Taper - Balanced to 30k RPM - Electroless Nickel

CAT50D-ER16-250    ER16 DC Chuck 2.5in (G2.5@30K)    
CAT50D-ER25-250    ER25 DC Chuck 2.5in (G2.5@30K)
CAT50D-ER32-250    ER32 DC Chuck 2.5in (G2.5@30K)

Weight 7.00 lbs
Our price: 222.70 CAD (169.99 USD)
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