Many Proxxon tools such as 28440, 28481, 28485, 28500, 28510, 28620 are designed for collets, held and clamped by a collet nut.

These tools do not have a sufficiently long threaded spindle to accept the Proxxon MICROMOT chuck 28941 and allow it to close fully.

For this reason we also offer the MTS 3.2mm chuck, which has a smaller body diameter which fits inside the nose shroud of 28440, 28481, 28485, 28620, 28500, 28510.

Specify which Proxxon tool you have, so we can supply the correct L-version or S-version of the Relativity 3.2mm chuck.