20Mm I.D. Hsk-63A Guhring Hydraulic Chuck W/Coolant & Increased Clamping Force, 200Mm Gage Length Hsk-A To Iso 12164-1 / Din 69893-1 | Balanced To G2.5 / 25,000 Rpm | Tremendous Clamping Force | Maximum Concentricity Deviation 3 Um | Extra Long Gage Lengths 150Mm & 160Mm Maximum Concentricity Deviation 5 Μm And 200Mm Gage Length Maximum Concentricity Deviation 7 Μm | Axial Length Adjustment | For Tool Shank Tolerance H6 | Includes Adjustment Screw, Series No. 4900 | Includes Hexagon Chuck Key, Series No. 4912 | Order Coolant Supply Set, Series No. 4949 Separately. The Use Of Reduction Sleeves Greatly Improves The Usefulness Of A Hydraulic Chuck. Clamp Directly On The Cutting Tool Shank Or Use A Reduction Sleeve To Hold A Different Diameter Tool Shank And Increase Transferable Torque By Approximately 25%. The Reduction Sleeve Outside Diameter Must Match Your Hydraulic Chuck's Nominal Inside Diameter. Reduction Sleeves Are Available In 6 Different O.D.S; 1/2", 3/4", 1-1/4", 12Mm, 20Mm & 32Mm For Clamping Tool Shanks From 1/8" To 1" & 3Mm To 25Mm. Series No. 4299, Order Code 020.2630. Made In Germany, Guhring Part #9042990202630

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