ER Collets with Enlarged Bore – ER8, ER11, ER16, ER20, ER25, ER32, ER40 – 0.008mm Precision

High-precision ER spring collets with an enlarged inner bore, giving increased clamping capacity compared with standard ER collets of the same size. Suitable for CNC router spindles, milling machines and lathes using ER collet chucks.

Specification

• Brand: MAIAM
• Collet sizes: ER8, ER11, ER16, ER20, ER25, ER32, ER40
• Precision (runout): 0.008mm
• Material: 42CrMnTi hardened steel
• Supplied as: single collets, or multi-collet sets for ER16 to ER40 (see variants)

Choosing your collet

Select the variant matching your collet chuck type (e.g. ER32) and the clamping diameter you need (e.g. 22mm), or choose a set to cover the full range for that size. These are non-standard enlarged-bore collets; if you need a standard ER collet, or aren't sure which size fits your machine, contact us and we'll help you identify the right part.