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ER20 Collets - Metric

Metric ER20 Collets

Code Nominal
Size
Clamping
Range (mm)
050-110-20010 1mm 0.5-1.0
050-110-20015 1.5mm 1.0-1.5
050-110-20020 2.0mm 1.5-2.0
050-110-20025 2.5mm 2.0-2.5
050-110-20030 3mm 2.5-3.0
050-110-20040 4mm 3.0-4.0
050-110-20050 5mm 4.0-5.0
050-110-20060 6mm 5.0-6.0
050-110-20070 7mm 6.0-7.0
050-110-20080 8mm 7.0-8.0
050-110-20090 9mm 8.0-9.0
050-110-20100 10mm 9.0-10.0
050-110-20110 11mm 10.0-11.0
050-110-20120 12mm 11.0-12.0
050-110-20130 13mm 12.0-13.0

(The 7pc set is a part set of ER20 Collets in sizes 1mm - 13mm as detailed above EXCEPT the 8 collets included in our ER20 Milling Chuck Set (2, 3, 4, 5, 6, 7, 8, and 10mm)).

Why you should use ER Collets

Unlike R8, 5C and Morse Taper collets, ER collets are slotted alternately from both ends and therefore compress onto the cutter along the whole length of the collet when tightened. This not only provides a better grip on the cutter shank but also allows some variation (typically 1mm) in shank sizes that may be used in a single collet (the ‘Clamping Range’). The smaller size collets are best used to hold cutters no more than 0.5mm below the nominal size.

Fitting and releasing an ER collet

How you should use ER Collets

Inspecting the inside of our ER collet nuts 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.

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.

050-110-20010 ER20 Collet 1mm £4.98 Excl.VAT
£5.98 Inc.VAT
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050-110-20015 ER20 Collet 1.5mm £4.98 Excl.VAT
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050-110-20020 ER20 Collet 2mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
£5.15 Inc.VAT
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050-110-20025 ER20 Collet 2.5mm £4.98 Excl.VAT
£5.98 Inc.VAT
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050-110-20030 ER20 Collet 3mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
£5.15 Inc.VAT
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050-110-20040 ER20 Collet 4mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
£5.15 Inc.VAT
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050-110-20050 ER20 Collet 5mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20060 ER20 Collet 6mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20070 ER20 Collet 7mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20080 ER20 Collet 8mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
£5.15 Inc.VAT
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050-110-20090 ER20 Collet 9mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
£5.15 Inc.VAT
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050-110-20100 ER20 Collet 10mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20110 ER20 Collet 11mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20120 ER20 Collet 12mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20130 ER20 Collet 13mm RRP: £5.57 Inc.VAT
£4.29 Excl.VAT
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050-110-20150 ER20 7pc Collet Set £31.23 Excl.VAT
£37.48 Inc.VAT
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050-110-20140 ER20 15pc Collet Set RRP: £75.31 Inc.VAT
£50.08 Excl.VAT
£60.10 Inc.VAT
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