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HAIMER 50.721.20 ER20 CAT 50, 3.94" Projection Collet Chuck Holder

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Item #
  • Brand: HAIMER
  • Model #: 50.721.20
  • Collet Series: ER
  • Collet Type: ER20
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Product Specifications
More Information
Model # 50.721.20
Collet Type ER20
Type ER Collet Chuck
Collet Series ER
Taper CAT 50
Projection 3.94"
Through Coolant Yes
Collet Range 0.04" - 0.51"
Clamping Nut Diameter ER20
Collet Size ER20
Gage Length 3.94"
Nut Diameter 1.34"
Prop. 65 Yes
Size ER-20
Trigger Sync No
Weight 4 lbs.
Country of Origin GERMANY
Shipping Restrictions UPS Ship (drop ship item)

Prop 65 Warning

Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.



  • For clamping tools with cylindrical shank in ER collets.


  • ER collet chuck with pre-balanced collet nut.
  • Balanced collet nuts with special side coating for low friction and higher clamping forces.
  • Chuck body fine balanced G2.5 22,000 1/min. or U <1gmm.
  • Taper tolerance AT3.
  • Coolant supply form ADB which means the central-coolant supply and coolant channels through the flange which can be sealed again.
  • Made to ASME B5.50 specifications.
  • Made in Germany.


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