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ER Collets

If your CNC tooling requirements include an ER collet, we have collet sizes ER11 to ER 50 for shank sizes 1/16 to 1in and metric sizaes from 7 to 25mm

These ER collets from Southeast Tool feature an amazing .0004in TIR and are available individually or in sets.

Check out our full range of CNC Parts and Accessories or check our online Southeast Tool catalog for an easy reference sheet to determine your collet sizes.

Collet SeriesLengthDiameter
ER 11 18mm (0.708in) 11.5mm (0.45in)
ER 16 27.5mm (1.08in) 17mm (0.67in)
ER 20 31.5mm (1.24in) 21mm (0.83in)
ER 25 34mm (1.34in) 26mm (1.02in)
ER 32 40mm (1.57in) 33mm (1.31in)
ER 40 46mm (1.81in) 41mm (1.61in)
ER 50 60mm (2.36in) 52mm (2.05in)