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ER Collet Nuts with Ball Bearing - Type B

ER Collet Nuts with Ball Bearing - Type B

The cone and release flange in a ball bearing collet nut remain 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 T2 collet nuts.
Code Size D L Thread
050-110-25561 ER25 42mm 20mm M32x1.5
050-110-32525 ER32 50mm 22.5mm M40x1.5
050-110-40591 ER40 63mm 25.5mm M50x1.5

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.

050-110-25561 ER25 Collet Nut with Ball Bearing - Type B - M32x1.5 Thread £6.04 Excl.VAT
£7.25 Inc.VAT
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050-110-32525 ER32 Collet Nut with Ball Bearing - Type B - M40x1.5 Thread £6.33 Excl.VAT
£7.60 Inc.VAT
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050-110-40591 ER40 Collet Nut with Ball Bearing - Type B - M50x1.5 Thread £6.51 Excl.VAT
£7.81 Inc.VAT
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