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.
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 | __ | __ | 1/4" | Hex | Yes | Steel | Steel | 0000000 | 000000 |
Thread | Drive | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For ID Range, mm | Max. Clamp Expansion, mm | Ht., mm | Flange OD, mm | Max. Clamping Force, lbs. | Size | Pitch, mm | Lg., mm | Size | Style | Mounting Fasteners Included | Material | Screw Material | Each | |
Top Actuated | ||||||||||||||
| 4.1-7.4 | 0.13 | 10.7 | 20 | 250 | M2 | 0.4 | 12 | 1.5 mm | Hex | Yes | Steel | Steel | 00000000 | 000000 |
| 7.1-12.4 | 0.25 | 21.8 | 29.72 | 950 | M4 | 0.7 | 25 | 3 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 12.2-14.2 | 0.33 | 24.9 | 31.5 | 1,900 | M6 | 1 | 30 | 5 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 13.5-20 | 0.38 | 24.9 | 37.5 | 2,500 | M8 | 1.25 | 30 | 6 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 18-27 | 0.38 | 28.6 | 50 | 4,500 | M10 | 1.5 | 35 | 8 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 23-35.3 | 0.38 | 31.8 | 56 | 5,900 | M12 | 1.75 | 40 | 10 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 29.3-42 | 0.38 | 39.6 | 69.5 | 10,000 | M16 | 2 | 45 | 14 mm | Hex | Yes | Steel | Steel | 00000000 | 00000 |
| 29.3-51.5 | 0.38 | 39.6 | 75.5 | 10,000 | M16 | 2 | 45 | 14 mm | Hex | Yes | Steel | Steel | 00000000 | 000000 |
| 29.3-77.7 | 0.38 | 45.5 | 107.5 | 10,000 | M16 | 2 | 50 | 14 mm | Hex | Yes | Steel | Steel | 00000000 | 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.
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 |
Parallel-Jaw Bar Clamps/Spreaders
The large, flat jaws remain parallel when clamping to apply even pressure without denting or marring the workpiece. Reverse the arms to use these clamps as spreaders. Pull the handle to lock or release the clamping arm.
Opening | Spreader Opening | |||||||
|---|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Reach | Holding Capacity, lbs. | Body Material | Each | |
| 12" | 0" | 15 5/16" | 10 1/2" | 3 3/4" | 1,000 | Steel | 0000000 | 000000 |
| 18" | 0" | 21 1/2" | 10 1/2" | 3 3/4" | 1,000 | Steel | 0000000 | 00000 |
| 24" | 0" | 28 3/4" | 10 1/2" | 3 3/4" | 1,000 | Steel | 0000000 | 00000 |
| 40" | 0" | 44 1/2" | 10 1/2" | 3 3/4" | 1,000 | Steel | 0000000 | 00000 |
| 50" | 0" | 52 1/2" | 10 1/2" | 3 3/4" | 1,000 | Steel | 0000000 | 00000 |
Fast-Action Bar Clamps/Spreaders
Each arm slides freely for quick, one-handed positioning. They lock when the screws are tightened onto a workpiece. Reverse the arms to use these clamps as spreaders.
Trigger-Action Bar Clamps/Spreaders
Reverse the arms to use these clamps as spreaders. Press the trigger to slide the clamping arm along the bar. Release the trigger and squeeze the pistol-grip handle to lock the clamp in place.
Opening | Spreader Opening | ||||||
|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Reach | Body Material | Each | |
300 lbs. Holding Capacity | |||||||
| 6" | 0" | 12 1/2" | 7 1/2" | 2 1/4" | Steel | 0000000 | 000000 |
| 12" | 0" | 18 1/2" | 7 1/2" | 2 1/4" | Steel | 0000000 | 00000 |
| 18" | 0" | 24 1/2" | 7 1/2" | 2 1/4" | Steel | 00000000 | 00000 |
| 24" | 0" | 30 1/2" | 7 1/2" | 2 1/4" | Steel | 00000000 | 00000 |
| 36" | 0" | 42 1/2" | 7 1/2" | 2 1/4" | Steel | 00000000 | 00000 |
600 lbs. Holding Capacity | |||||||
| 6" | 0" | 14 7/8" | 9 1/4" | 3 5/8" | Steel | 00000000 | 00000 |
| 12" | 0" | 20 1/2" | 9" | 2 3/4" | Steel | 00000000 | 00000 |
| 18" | 0" | 26 1/2" | 9" | 2 3/4" | Steel | 00000000 | 00000 |
| 24" | 0" | 32 1/2" | 9" | 2 3/4" | Steel | 00000000 | 00000 |
| 36" | 0" | 44 1/2" | 9" | 2 3/4" | Steel | 00000000 | 00000 |
| 50" | 0" | 58 1/2" | 9" | 2 3/4" | Steel | 00000000 | 00000 |