NSK 90° Angle type spindle with wide chucking range up to ø1/4" (ø6 mm), is suitable for installations where space restrictions exist.• Maximum allowable motor speed for the spindle: 20,000rpm• Maximum rotating speed at the cutting tool: 7,490rpm• Spindle Accuracy: Within 2 μm• Standard Size Collet Chuck (CHK-3.175): ø1/8"• Weight: 11.46 oz.• NSK Catalog Number: AS51094 (RAS100)• Replaces older RAS-100 spindle)Standard Equipment:• Collet Chuck ø1/8" (CHK-3.175) : 1 pc.• 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", 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 ø5 mm