ER40 collets hold maximum 1.024 inches or 26 mm diameter. Each ER40 collet has a range of .039 inches or 1 mm. The size indicated on the collet is the largest diameter it can hold while the collet can be collapsed to a smaller diameter. For example, ER40-1/4 can hold a shank from .250 to .211 inch diameter.
L20000004

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ER Collet
ER32 COLLET SET 18 PCS 3-20 mm

L30000220
ER50 COLLET SET 12 PCS 12-34 mm

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The information provided for reference purposes only. Although all possible efforts were made to make this information accurate, we can not guarantee that particular part will fit your application. Specifications can be changed without prior notice. All prices are for reference only and can be changed without prior notice. Not all models are available in all countries due to possible patents and other restrictions.