This NSK Spindle is suitable for the grinding of the inner surface of slender and deep holes. (Example) If a ø0.55" grindstone is mounted on the grinding arbor AGM-01, this spindle is suitable for the inner grinding of ø0.59" or more and with the depth of 1.57" or less.• Allowable Motor Speed: 30,000 rpm• Standard Size Collet Chuck (CHK-3.175): ø1/8"• Weight: 6.03 oz.• NSK Catalog Number: AS11510Included Equipment:• Collet Chuck ø1/8" (CHK-3.175): 1 pc.• Wrench (7 x 5.1), (6 x 4.5), (20 x 24): 1 pc.Optional Equipment:• Collet Chuck (CHK-[][]): ø0.3 mm~ø3.0 mm in 0.1 mm increments and 2.35mm, ø1/8"• Grindstone Arbor (AGM-01): For grinding wheel with I.D. of ø5 mm