The ID Xpansion™ clamp is the ideal solution to hold parts on an inside diameter for high density machining on vertical or horizontal machining centers. It can also be used as an expanding mandrel on a lathe. These machinable clamps are produced in 12L14 steel with black oxide coating in 12 sizes and can hold internal diameters from under 3/16 to almost 10 inches (4.1 to 254mm). #10 manufactured using 7075-T6 aluminum. 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 a proper fit. Often times the clamps can be remachined for different size jobs. The low profile ID Xpansion™ Clamp can hold several parts in one compact area for secondary operations without any clamping interference. They are quickly tightened with a hex key, torque driver or can be mated to hydraulic pull cylinders for automation. Part Number Model Number A B C D E .000 -.050 F G H* I J Torque (N.m.) Holding Force (N.) Replacement Tapered Screws 38000 #00 10.7 7.6 6.1 3.0 20.0 7.4 4.1 M2 on 13.7 BHC M2x12 4.1 .70 1,113 38001 38050 #0 21.8 16.0 15.0 5.9 29.72 12.4 7.1 M3 on 20.95 BHC M4x25 7.2 5.00 4,228 38002 38100 #1 24.9 19.0 15.0 5.9 31.5 14.2 12.2 M3 on 23.1 BHC M6x30 11.2 17.00 8,455 38010 38150 #2 24.9 19.0 15.0 5.9 37.5 20.0 13.5 M3 on 29.0 BHC M8x30 13.2 34.00 11,125 38020 38200 #3 28.6 22.2 17.5 6.4 50.0 27.0 18.0 M4 on 39.4 BHC M10x35 16.3 60.00 20,025 38032 38250 #4 31.8 25.4 20.6 6.4 56.0 35.3 23.0 M4 on 45.5 BHC M12x40 20.3 150.00 26,255 38042 38300 #5 39.6 31.8 27.0 7.9 69.5 42.0 29.3 M5 on 55.9 BHC M16x45 21.4 280.00 44,500 38052 38350 #6 39.6 31.8 27.0 7.9 75.5 51.5 29.3 M5 on 63.9 BHC M16x45 21.4 280.00 44,500 38052 38400 #7 45.5 37.6 32.3 7.9 107.5 77.7 29.3 M6 on 92.6 BHC M16x50 19.3 280.00 44,500 38072 38450 #8 45.5 37.6 32.3 7.9 132.9 103.0 29.3 M6 on 118.06 BHC M16x50 19.3 280.00 44,500 38072 38500 #9 45.5 37.6 32.3 7.9 132.9 175.0 29.3 M6 on 118.06 BHC M16x50 19.3 280.00 44,500 38072 38550** #10 45.5 37.6 32.3 7.9 152.4 250.2 29.3 M6 on 133.35 BHC M16x50 19.3 170.00 26,000 38072 G Minimum diameter the “F” dimension can be machined or turned down to. H* – (3) Mounting Screws Included. (4) Mounting Screws Included with #9 & #10. ** – Clamp made from 7075-T6 aluminum stock. MODEL #00 – #6 ID Xpansion™ Clamps Expand clamp approximately .1mm 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 while machining the clamp. Machine a pocket in the fixture. For 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 into the flange for additional rigidity if required. Long length screws available for sizes #0 thru #10. For blind hole app’s, see our Manual Actuators or call for custom screws/other options. Range of expansion .13 to .64mm depending upon size. MODEL #7-10 ID Xpansion™ Clamps Locking rings are provided to ensure segments remain rigid while machining clamps to size (#9 and #10 ID’s ship with 2 rings). Insert supplied ring(s) and tighten drive screw to 55 N.m. and machine clamp diameter to .08/.13mm over bore size. Remove ring(s) and test fitment with workpiece. If workpiece fitment is tight, repeat machining process and machine to achieve a close fit to workpiece MMC bore size. Aggressive material removal is not recommended when machining clamps to size. Suggested machining practice is to spiral down with a 12mm end mill by conventional milling .5mm off the desired clamp diameter at 2 m/s and 0.03mm per flute and .0.5mm depth per trip around. Finish final diameter at 3.6 m/s using same 0.04mm per flute feed and 6mm depth and climb mill.
