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BT30 ER20 90mm Mini Nut Collet Chuck Tool Holder $133.35
BT30 ER20 90mm Mini Nut Collet Chuck Tool Holder
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BT30 ER20 90mm Mini Nut Collet Chuck Tool Holder
Click to enlarge 		BT30 ER20 90mm Mini Nut Collet Chuck Tool Holder
Click to enlarge
BT30 ER20 90mm Mini Nut Collet Chuck Tool Holder
Click to enlarge
Item No. BT30-ER20-90M
Price: $133.35
Shipping: In Stock - Ships Same Day *
Quantity: 

* Same Day Shipping is only available on orders placed Monday - Friday before 4 P.M. Central Time.
Product Info

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  • Collet Chuck accepts all ER20 collets
  • Works on all BT 30 machines
  • Threaded for stop screw type 1 (not included)
  • All critical tool holder surfaces precision ground
  • Made from hardened alloy steel
  • Balanced to G2.5 at 20,000 rpms
  • Gage length is 90mm (3.54 inches)
  • Concentricity is less than .0001 at collet face
  • Collet nut is included
  • Mini Collet Nut is slimmer than standard collet nut
  • ER20 Mini Nut has an id thread of 24mm X 1.0 pitch. Outside diameter is 1.102 inches (28mm)
  • Must use ER20M collet wrench
  • Rear thread for pull stud is m12 x 1.75
  • View BT30 Pull Studs
  • MariTool Part# is BT30-ER20-90M
Product Specifications
Balance Spec:  G2.5 @ 20,000 rpms
Collet Grip Range:  .024-.5625 inches
Collet Nut:  ER20M
Collet Size:  ER 20
Concentricity:  < .0001 at Collet Face
Coolant Thru:  Yes
Finish:  Black Oxide
Gage Length:  90mm
Material:  Hardened Alloy Steel
Rear Thread:  M12 x 1.75
Taper:  BT30