ID XPANSIONTM CLAMPS The ID Xpansion clamp is the ideal way to hold multiple parts on an inside diameter for multiple machining on a vertical machining center or a horizontal machining center These machinable clamps are produced in 11 sizes and can hold internal diameters from under 3/16ths inches to just under 7 inches. They use a heat treated tapered screw for expansion. The flange diameter of the clamp is held to a close tolerance for precision locating in a machined pocket on work cubes and fixture plates. The customer machines the mild steel clamp to match the bore of the part ensuring proper fit. Often times the clamps can be remachined for different size jobs. One of the benefits of these low profile clamps is holding many lathe parts, for secondary machining, on one compact set up. They are quickly tightened with a hex key, torque driver or can be mated to hydraulic pull cylinders for automation. Low Profile Ideal for Secondary Operations on lathe parts Easily machined to size on lathe or mill Excellent for palletized setups Allows more parts per workcube or fixture plate Heat-Treated and coated screw for long life Clamp body made of mild steel for machinability Tighten with Hex Key or Hydraulic Pull Cylinders (Drill clearance hole for longer bolt into cylinder) New Size! Same flange diameter as Model #8. (Part No. 31500, Model#9) Clamping mill parts on two bores. Part Number Model Number   A  B  C  D E +.000 -.002 F  G +       H* I J Torque (Ft/lbs.) Holding Force 31000 #00 CAD .42 .30 .24 .12 .787 .29 .16 2-56 on .540 BHC 2 - 56 .16 0.5 250 31050 #0 CAD .86 .63 .59 .23 1.170 .49 .28 6-32 on .825 BHC 8 - 32 .30 3.6 950 31100 #1 CAD .98 .75 .59 .23 1.240 .56 .48 6-32 on .910 BHC 1/4 - 20 .50 13.3 1900 31150 #2 CAD .98 .75 .59 .23 1.476 .79 .53 6-32 on 1.140 BHC 5/16 - 18 .56 27.6 2500 31200 #3 CAD 1.13 .88 .69 .25 1.968 1.06 .71 8-32 on 1.550 BHC 3/8 - 16 .71 49.3 4500 31250 #4 CAD 1.25 1.0 .81 .25 2.205 1.39 .90 8-32 on 1.790 BHC 1/2 - 13 .71 120.0 5900 31300 #5 CAD 1.56 1.25 1.06 .31 2.736 1.65 1.15 10-32 on 2.200 BHC 5/8 - 11 .79 224.0 10,000 31350 #6 CAD 1.56 1.25 1.06 .31 2.972 2.03 1.15 10-32 on 2.515 BHC 5/8 - 11 .79 224.0 10,000 31400 #7 CAD 1.79 1.48 1.27 .31 4.232 3.06 1.15 1/4-20 on 3.646 BHC 5/8 - 11 .79 224.0 10,000 31450 #8 CAD 1.79 1.48 1.27 .31 5.232 4.06 1.15 1/4-20 on 4.648 BHC 5/8 - 11 .79 224.0 10,000 31500 #9 CAD 1.79 1.48 1.27 .31 5.232 6.89 1.15 1/4-20 on 4.648 BHC 5/8 - 11 .79 224.0 10,000 *31550 #10 CAD 1.79 1.48 1.27 .31 6.0 9.85 1.15 1/4-20 on 5.250 BHC 5/8 - 11 .79 125.0 6,000 G+ Minimum diameter thr "F" dimension can be machined or turned down to. H* - (3) Mounting Screws Included. * - Clamp made from 7075-T6 aluminum stock. MACHINING AND INSTALLATION Expand clamp approximately .002 over relaxed diameter and machine to fit workpiece bore, either on lathe or mill. If machining the clamp on a lathe use the nut provided, on the back of the clamp, to tighten the tapered screw. This nut is used only to machine the clamp. Range of expansion .008 to .020 depending upon size. Machine a pocket, in the fixture, for the close tolerance "E" dimension and drill and tap mounting holes per "H" column. Drill and tap a hole from the "I" column in the center of the pocket for the tapered screw. A recessed dowel pin may be installed in to the flange for additional rigidity if required. Range of expansion .005 to .025 depending upon size. #7-10 ID Xpansion Clamps Locking rings provided to ensure segments remain rigid while matching clamps to size Insert ring and tighten drive screw, machine clamp to bore size. Remove ring to clamp workpiece. Aggressive material removal not recommended when machining clamps to size. Range of expansion .005 to .020 depending upon size.