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ER Collet Nuts with Ball Bearing - Type A

ER Collet Nuts with Ball Bearing

The friction between the collet and the nut when tightening and loosening is almost elminitated due to the cone and release flange in the ball bearing collet nut, which remains stationary relative to the collet thereby almost eliminating friction between the collet and the nut when tightening and loosening the collet.

  • Reduced friction allows a higher clamping pressure to be applied.
  • Easier to use - especially when closing a collet to the smaller end of its range.
  • Compatible with collet chucks fitted with Type T1 collet nuts.
Code Size D L Thread Hex Head AF
050-110-11540 ER11 19mm 11.3mm M14x0.75 17mm
050-110-16570 ER16 28mm 17.5mm M22x1.5 25mm
050-110-20570 ER20 34mm 19mm M25x1.5 30mm

Mounting ER Collets

Inspecting the inside of an ER collet nut reveals an internal flange that has been machined eccentric to the main axis of the nut. This is not a machining error but is designed that way to lock onto the groove of the collet and aid its release from the chuck body.

For this feature to work properly, the collet must be mounted in the nut first before fitting the assembly into the chuck body. To mount the collet in the nut, insert it on an angle, turn slightly and push it into the nut until it clicks into place on the eccentric flange. The cutter may now be fitted and the assembly tightened hard into the chuck body.

Fitting and releasing an ER collet

To remove the cutter, slacken and undo the nut until resistance is felt. Then, using a collet wrench, further undo the nut until the collet is released from the chuck body.

Removal of the collet from the nut is the reverse of the mounting procedure.

050-110-11540 ER11 Collet Nut with Ball Bearing - Type A - M14x0.75 Thread £5.12 Excl.VAT
£6.14 Inc.VAT
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050-110-16570 ER16 Collet Nut with Ball Bearing - Type A - M22x1.5 Thread £5.12 Excl.VAT
£6.14 Inc.VAT
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050-110-20570 ER20 Collet Nut with Ball Bearing - Type A - M25x1.5 Thread £5.12 Excl.VAT
£6.14 Inc.VAT
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