4Mm I.D. X 12Mm O.D. Guhring Sealed Hydraulic Chuck Reduction Sleeve For Coolant Fed Tools For Clamping Smaller Shank Diameter In Hydraulic Chucks | For Tool Shank Tolerance H6 | Concentricity Deviation ? 2 Um | With Adjustable Limit Stop | Sealed Design For Use With Cutting Tools That Have Internal Coolant Ducts | The Application Of Reduction Sleeves Permits Transferable Torque Increase Of Approximately 25% In Comparison To Direct Clamping. The Reduction Sleeve Outside Diameter Must Match Your Hydraulic Chuck's Nominal Inside Diameter. Reduction Sleeves Are Available In 6 Different Outside Diameters; 1/2", 3/4", 1-1/4", 12Mm, 20Mm & 32Mm For Clamping Tool Shanks From 1/8" To 1" & 3Mm To 25Mm. Series No. 4368, Order Code 004.0120. Made In Germany, Guhring Part #9043680040120

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