Inside Diameter Fixture Clamps
Secure a workpiece from the inside diameter, leaving the outside clear for machining. Machine these clamps to match the precise size and contours of your workpiece ID. Mount the clamp to your fixture with the included screws and place your workpiece over it. Turn the socket head cap screw to expand the clamp.
Top-actuated clamps tighten from the top of the clamp, so workpieces need a through hole.
Side-actuated clamps tighten from the side of the clamp, gripping parts without a through hole in the top.
For technical drawings and 3-D models, click on a part number.
Thread | Drive | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For ID Range | Max. Clamp Expansion | Ht. | Flange OD | Max. Clamping Force, lbs. | Size | Lg. | Size | Style | Mounting Fasteners Included | Material | Screw Material | Each | |
Top Actuated | |||||||||||||
| 0.16"-0.29" | 0.005" | 27/64" | 25/32" | 250 | 2-56 | 1/2" | 5/64" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 0.28"-0.49" | 0.01" | 55/64" | 1 11/64" | 950 | 8-32 | 1" | 9/64" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 0.48"-0.56" | 0.013" | 63/64" | 1 15/64" | 1,900 | 1/4"-20 | 1 1/4" | 3/16" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 0.53"-0.79" | 0.015" | 63/64" | 1 15/32" | 2,500 | 5/16"-18 | 1 1/4" | 1/4" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 0.71"-1.06" | 0.015" | 1 1/8" | 1 31/32" | 4,500 | 3/8"-16 | 1 1/2" | 5/16" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 0.9"-1.39" | 0.015" | 1 1/4" | 2 13/64" | 5,900 | 1/2"-13 | 1 1/2" | 3/8" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 1.15"-1.65" | 0.015" | 1 9/16" | 2 47/64" | 10,000 | 5/8"-11 | 1 3/4" | 1/2" | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 1.15"-2.03" | 0.015" | 1 9/16" | 2 31/32" | 10,000 | 5/8"-11 | 1 3/4" | 1/2" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 1.15"-3.06" | 0.015" | 1 51/64" | 4 15/64" | 10,000 | 5/8"-11 | 2" | 1/2" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 1.15"-4.06" | 0.015" | 1 51/64" | 5 15/64" | 10,000 | 5/8"-11 | 2" | 1/2" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 1.15"-6.89" | 0.02" | 1 51/64" | 5 15/64" | 10,000 | 5/8"-11 | 2" | 1/2" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 1.15"-9.85" | 0.08" | 1 51/64" | 6" | 6,000 | 5/8"-11 | 2" | 1/2" | Hex | Yes | Aluminum | Steel | 0000000 | 000000 |
Side Actuated | |||||||||||||
| 0.71"-1.12" | 0.012" | 1 5/8" | 1 31/32" | 4,000 | 3/8"-16 | 1 1/2" | 1/4" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
Inside Diameter Fixture Clamps for Castings and Rough Parts
These clamps wedge against the workpiece ID to grip cast, unfinished, or uneven parts, leaving the outside clear for machining. Do not use these clamps on smooth or finished ID’s because they will leave a mark. The clamp’s screw tightens from the top of the clamp, so workpieces require a through hole. Thread the clamp into a tapped hole in your fixture and place your workpiece over it. Reach through the hole to turn the screw, expanding the clamp.
For technical drawings and 3-D models, click on a part number.
Thread | Drive | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For ID Range | Max. Clamp Expansion | Body Ht. | Overall Ht. | Max. Clamping Force, lbs. | Size | Pitch, mm | Lg., mm | Size, mm | Style | Mounting Fasteners Included | Material | Screw Material | Each | |
| 0.768"-0.945" | 0.178" | 23/64" | 29/64" | 450 | M4 | 0.7 | 12 | 3 mm | Hex | Yes | Steel | Steel | 0000000 | 000000 |
| 0.925"-1.142" | 0.217" | 33/64" | 43/64" | 1,120 | M6 | 1 | 18 | 5 mm | Hex | Yes | Steel | Steel | 0000000 | 00000 |
| 1.122"-1.417" | 0.295" | 43/64" | 7/8" | 2,000 | M8 | 1.25 | 25 | 6 mm | Hex | Yes | Steel | Steel | 0000000 | 00000 |