TRUSCO Straight shank collet holder for NC lathes ERM round shank collet holder S type (metric) Shank diameter 25 Total length 166 For ER20 S25-ER20M-137.5 1 piece

Catalog number: S25-ER20M-137.5 Features: ●A round shank collet holder that can be used with machining centers, etc. ●The nut is an ERM (mini) type. Specifications: ●Shank diameter (mm): 25 ●Outer diameter (mm): Nut diameter 28 ●Total length (mm): 166 ●Compatible wrench: W-ER20M ●Compatible collet: ER20 ●Total length L1 (mm): 138 ●Total length L2 (mm): 28 ●A round shank collet holder that can be used with machining centers, etc. ●The nut is an ERM (mini) type. ●There are three types of shanks: 16 mm, 20 mm, and 25 mm. ●Wrenches and collets are sold separately. ●Shank straightness (runout accuracy): ±0.0010 mm to 0.0030 mm at a position 300 mm from the tip of the holder. Material/Finish: ●SCM415