HYDRO-GRIP Toolholders for Woodworking - ETP - #39

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39 TEchnical specificatio n Use of screws in the ring nut (Type B, BI and BL). The knurled ring nut only needs to be lightly tightened so the tools are in contact with each other. Tightening the three screws in the ring nut ensures that the tools are safely and accurately fixed into position. This allows you to maintain the accuracy achieved on the grinding machine when you move the sleeve and tool assembly to the spindle on your production machine. Tolerances ETP HYDRO-GRIP is intended for machine spindle tolerance g6 and tool tolerance H7. (See tables to right) Permanent assembly A tool with a hole tolerance of H7 gives a light press fit on the sleeves meant for permanent assembly, type A and AI. When pressurized the sleeve expands against the spindle, thus eliminating any play between the sleeve and spindle. Interchangeable assembly A tool with a hole tolerance of H7 gives a an easy slip fit on sleeves meant for interchangeable tool assembly, type CIR, CI, C, BI and B. When pressurized the sleeve expands against the spindle, thus eliminating any play between the tool and spindle. Pressurizing medium HYDRO-GRIP works at a relatively high pressure of (approx. 450 bar) and is pressurized with a small amount of grease. It is therefore very important that the correct type of pressurizing grease is used. We strongly recommend Blasolube 301. Tests have shown that use of other types of non-recommended soap based grease can cause deformation of the sleeve (similar to a permanent plastic deformation) when the pressure is reduced. The Ø45 and Ø50 sleeves Spindle, g6 Ø 30 -0.007 to -0.020 mm Ø 1 1/4" Ø 1 1/2" Ø 40 Ø 45 Ø 50 Ø 1 3/4" Ø 1 13/16" -0.009 to -0.025 mm Ø 2 1/8" Ø 2 3/16" -0.010 to -0.029 mm Tool fastening hole, H7 Ø 20 Ø 25 Ø 30 Ø 3/4" Ø 1" 0 to +0.021 mm Ø 1 1/4" Ø 38 Ø 40 Ø 50 0 to +0.025 mm Ø 60 Ø 65 Ø 80 0 to +0.030 mm Ø 100 0 to +0.035 mm Router bit shank g6 (h7) Ø 12 Ø 16 Ø 1/2" Ø 5/8" 0 to -0.018 mm Ø 20 Ø 25 Ø 3/4" Ø 1" 0 to -0.021 mm The Ø45 sleeve has two carrier pegs, 8,5 x 5 mm. The Ø50 has two, threaded M5-holes for carrier pegs, on a 70 mm pitch diameter.