This NSK MA Series Spindle can be used in conjunction with water or oil based coolants. Collets are sold seperately. • Allowable Motor Speed: 30,000 rpm • Spindle Accuracy: Within 1 µm • Requires CHK Collet ø1/4" diameter maximum. • Weight: 7.58 oz. • NSK Catalog Number: AS41830 • Replaces older NR-302 and NR-301 spindles (AS11409 NR301, AS41086 NR302) Included Equipment: • Chuck Nut (K-265): 1 pc. • Wrench (12 x 14): 2 pcs., (20 x 24): 1 pc. Optional Equipment: • Collet Chuck (CHK-[][]): ø0.5 mm~ø6.0 mm in 0.1 mm increments and ø2.35mm, ø1/8", ø3/16", 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