ER Collet Dimension Size chart: ER collets contract over a range of 1mm and are available in 1mm or 0.5mm steps except ER50 Collet system range have 2mm steps, so a range of ER collets can hold any cylindrical shank, metric or imperial. ER collets may also be used on a lathe to hold work pieces, the collet's advantage over other types of chuck is that it combines all of the following traits into one chuck; making it highly useful for repetitive work. Lexis Tooling Systems - we are well-known manufacturers, sellers, suppliers, exporters and distributors of Tool Holding Products having manufacturing plant in Coimbatore, India engaged in manufacturing of Tool Holding Products consist of different kind of ER Collet System using state of art machinery and gauges to assure Quality Collet and 100% accuracy at par with DIN & ANSI International Standard guidelines. Lexis tooling ER Collets are designed to unclamp one part and switch to new part and reclamp easily, its reliable for Self centering, strong clamping, hence our collet chuck can deliver all reliably, and with no need for a skilled user do depend on the object being clamped closely matching the size and shape of the collet's clamping surface. This constraint is usually not a problem when the object is good-quality bar stock; the shank of a well maintained drill bit, reamer, end mill, etc.; or a previously machined part that is being rechucked for additional cutting operations). The different ER collet Dimension chart explained with ER Collet size chart given herewith for your reference. ER8 Collet Sizes ER11 Collet Sizes ER16 Collet Sizes ER20 Collet Sizes ER25 Collet Sizes ER32 Collet Sizes ER40 Collet Sizes ER50 Collet Sizes ER8 Collet Dimensions ER11 Collet Dimensions ER16 Collet Dimensions ER20 Collet Dimensions ER25 Collet Dimensions ER32 Collet Dimensions ER40 Collet Dimensions ER50 Collet Dimensions