This NSK Spindle can be used for small-diameter milling, drilling, slitting, chamfering, grinding, etc. • Allowable Motor Speed: 50,000 rpm • Spindle Accuracy: Within 1 µm • Standard Size Collet Chuck (CHK-3.175): ø1/8" • Weight: 15.52 oz. • NSK Catalog Number: ASE1566 (Formerly NR-452) Included Equipment: • Collet Chuck ø1/8" (CHK-3.175) • Chuck Nut (K-265): 1 pc. • Wrench (12 x 14): 2 pcs., (22 x 27): 1 pc. Optional Equipment: • Collet Chuck (CHK-[][]): ø0.5 mm~ø6.0 mm in 0.1 mm increments and 2.35mm, ø1/8", ø1/4" • Chuck Nut (K-265): For Collet Chuck (CHK) • Metal Saw Arbor (KCH-03): For ø0.24" (I.D.) x ø1.18" (O.D.) • Drill Chuck Arbor (DCH-J0K): For Jacob's Taper No. 0 • Grindstone Arbor (AGM-03): For grinding wheel with I.D. of ø5mm • Grindstone Flange (EGF-19): ø19.05 (I.D.) x ø40 (O.D.) x 7 (W) mm