Fixture Keys
Sized to fit with precision in machine table T-slots, use these keys to locate fixtures and vises on your machine table. They mount to the underside of your fixture or vise with a socket head cap screw.
For technical drawings and 3-D models, click on a part number.
| For Machine Table T-Slot Wd. | Lg. | Wd. | Ht. | Wd. Tolerance | For Mounting Screw Size  | Mounting Fasteners Included | Material | Each | |
Rectangular | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 5/16" | 3/4" | 5/16" | 1/2" | -0.0005" to 0" | No. 4 | No | Steel | 0000000 | 00000 |
| 3/8" | 3/4" | 3/8" | 1/2" | -0.0005" to 0" | No. 6 | No | Steel | 0000000 | 0000 |
| 7/16" | 3/4" | 7/16" | 1/2" | -0.0005" to 0" | No. 6 | No | Steel | 0000000 | 0000 |
| 1/2" | 3/4" | 1/2" | 1/2" | -0.0005" to 0" | 1/4" | No | Steel | 0000000 | 0000 |
| 9/16" | 3/4" | 9/16" | 1/2" | -0.0005" to 0" | 1/4" | No | Steel | 0000000 | 0000 |
| 5/8" | 3/4" | 5/8" | 1/2" | -0.0005" to 0" | 5/16" | No | Steel | 0000000 | 0000 |
| 11/16" | 1" | 11/16" | 1/2" | -0.0005" to 0" | 5/16" | No | Steel | 0000000 | 00000 |
| 3/4" | 1 1/4" | 3/4" | 1/2" | -0.0005" to 0" | 5/16" | No | Steel | 0000000 | 00000 |
| 13/16" | 1 1/4" | 13/16" | 1/2" | -0.0005" to 0" | 5/16" | No | Steel | 000000 | 00000 |
| 7/8" | 1 1/4" | 7/8" | 3/4" | -0.0005" to 0" | 5/16" | No | Steel | 0000000 | 00000 |
| 1" | 1 1/4" | 1" | 3/4" | -0.0005" to 0" | 5/16" | No | Steel | 0000000 | 00000 |
| 1 1/8" | 1 1/2" | 1 1/8" | 3/4" | -0.0005" to 0" | 3/8" | No | Steel | 0000000 | 00000 |
| 1 1/4" | 1 1/2" | 1 1/4" | 1" | -0.0005" to 0" | 3/8" | No | Steel | 0000000 | 00000 |
| 1 5/16" | 1 1/2" | 1 5/16" | 1" | -0.0005" to 0" | 3/8" | No | Steel | 0000000 | 00000 |
| 1 3/8" | 1 1/2" | 1 3/8" | 1" | -0.0005" to 0" | 3/8" | No | Steel | 0000000 | 00000 |
| For Machine Table T-Slot Wd., mm | Lg., mm | Wd., mm | Ht., mm | Wd. Tolerance, mm | For Mounting Screw Size | Mounting Fasteners Included | Material | Each | |
Rectangular | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 10 | 20 | 10 | 8 | -0.009 to 0 | M4 | No | Steel | 0000000 | 000000 |
| 12 | 20 | 12 | 8 | -0.011 to 0 | M5 | No | Steel | 0000000 | 00000 |
| 14 | 22 | 14 | 10 | -0.011 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 16 | 22 | 16 | 10 | -0.011 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 18 | 22 | 18 | 10 | -0.011 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 20 | 22 | 20 | 10 | -0.013 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 22 | 32 | 22 | 12 | -0.013 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 24 | 32 | 24 | 12 | -0.013 to 0 | M6 | No | Steel | 0000000 | 00000 |
Stepped Rectangle | |||||||||
| 28 | 32 | 20 | 12 | -0.013 to 0 | M6 | No | Steel | 0000000 | 00000 |
| 36 | 32 | 20 | 12 | -0.013 to 0 | M6 | No | Steel | 0000000 | 00000 |
Hole-Mount Fixture Keys
Install these keys in a drilled and reamed hole to locate fixtures and vises on your machine table. They mount to the underside of the fixture or vise. Each key can fit multiple machine table T-slot widths. Also known as sine keys.
Expanding keys have a screw that tightens from the top or bottom to adjust the shank size, giving the key a tight fit in a hole in your fixture.
Push-in keys are the only fixture keys compatible with DX-series Kurt vises. Insert them into the holes on the bottom of the vise and built-in O-rings hold the keys in place. They are sold in pairs.
For Machine Table T-Slot Wd. | Shank | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (C) | For Hole Size | For Hole Size Tolerance | Ht. | Dia. | Ht. | Each | |
Steel | |||||||||
| 5/8" | 11/16" | 13/16" | 5/8" | -0.0005" to 0.0005" | 7/16" | 5/8" | 3/4" | 0000000 | 000000 |
For Machine Table T-Slot Wd. | Shank | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| (A), mm | (B), mm | (C), mm | For Hole Size | For Hole Size Tolerance | Ht. | Dia. | Ht. | Each | |
Steel | |||||||||
| 14 | 16 | 18 | 5/8" | -0.0005" to 0.0005" | 7/16" | 5/8" | 3/4" | 0000000 | 000000 |
For Machine Table T-Slot Wd. | Shank | |||||||
|---|---|---|---|---|---|---|---|---|
| (A) | (B) | For Hole Size | For Hole Size Tolerance | Ht. | Dia. | Ht. | Pair | |
Steel | ||||||||
| 1/2" | 9/16" | 5/8" | -0.0005" to 0.0005" | 1/4" | 5/8" | 15/32" | 0000000 | 000000 |
| 5/8" | 11/16" | 5/8" | -0.0005" to 0.0005" | 1/4" | 5/8" | 15/32" | 0000000 | 00000 |
| 3/4" | 13/16" | 5/8" | -0.0005" to 0.0005" | 1/4" | 5/8" | 15/32" | 0000000 | 00000 |
| 7/8" | 1" | 5/8" | -0.0005" to 0.0005" | 1/4" | 5/8" | 15/32" | 0000000 | 00000 |
Ball-Lock Quick-Change Fixture Clamps
Build these components into fixture plates, machine subplates, and tombstones for quick changes. The system clamps and locates at the same time for accurate positioning with repeatability of ±0.0005". Components are compatible with Jergens Ball-Lock, Carr-Lane Carr Lock, and Kurt PinLock quick change systems.
For accurate positioning, at least two sets of clamps, liners, and receivers are required. Install the receivers in the base plate and the liners in the fixture plate. Then line up the two plates, insert the clamps, and tighten their screws to secure the fixture in place. If more holding capacity is needed, use additional clamps and receivers but omit liners to prevent the clamp from getting stuck in the fixture plate.
Push receiver plugs into unused receivers to prevent chips and coolant from accumulating during machining. When installed, plugs sit flush with the surface of the fixture plate. To remove, thread a screw into the tapped hole in the center and pull up.
For technical drawings and 3-D models, click on a part number.
Shank | Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Fixture Plate Thick. | Dia., mm | Lg. | Dia. | Thick. | Hex Key Size | For Fixture Plate Thick. Tolerance | Holding Capacity, lbs. | Material | Includes | Each | |
| 1/2" | 13 | 1.08" | 7/8" | 1/4" | 3/32" | -0.005" to 0.005" | 625 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 0000000 |
| 1/2" | 16 | 1.15" | 1 1/2" | 5/16" | 1/8" | -0.005" to 0.005" | 800 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 3/4" | 13 | 1.33" | 7/8" | 1/4" | 3/32" | -0.005" to 0.005" | 625 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 3/4" | 16 | 1.40" | 1 1/2" | 5/16" | 1/8" | -0.005" to 0.005" | 800 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 3/4" | 20 | 1.53" | 1 3/4" | 3/8" | 1/8" | -0.005" to 0.005" | 2,250 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 3/4" | 25 | 1.70" | 2" | 3/8" | 5/32" | -0.005" to 0.005" | 5,440 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 1" | 20 | 1.78" | 1 3/4" | 3/8" | 1/8" | -0.005" to 0.005" | 2,250 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 1" | 25 | 1.95" | 2" | 3/8" | 5/32" | -0.005" to 0.005" | 5,400 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 1" | 30 | 2.13" | 2 1/4" | 1/2" | 3/16" | -0.005" to 0.005" | 8,000 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 1" | 35 | 2.22" | 2 1/4" | 1/2" | 1/4" | -0.005" to 0.005" | 11,780 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 1 1/2" | 50 | 3.20" | 3" | 3/4" | 3/8" | -0.005" to 0.005" | 15,200 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| 2" | 50 | 3.70" | 3" | 3/4" | 3/8" | -0.005" to 0.005" | 15,200 | Black-Oxide Steel | Hex Key, Set Screw | 0000000 | 000000 |
| For Fixture Plate Thick. | For Clamp Shank Dia., mm | OD | OD Tolerance Range | For Fixture Plate Thick. Tolerance | Material | Each | |
| 1/2" | 13 | 0.7518" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 000000 |
| 1/2" | 16 | 1.0018" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 3/4" | 13 | 0.7518" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 3/4" | 16 | 1.0018" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 3/4" | 20 | 1.3772" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 3/4" | 25 | 1.3772" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1" | 20 | 1.3772" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1" | 25 | 1.3772" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1" | 30 | 1.7523" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1" | 35 | 1.7523" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1" | 50 | 2.5025" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1 1/2" | 35 | 1.7523" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 1 1/2" | 50 | 2.5025" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 2" | 35 | 1.7523" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| 2" | 50 | 2.5025" | -0.0004" to 0" | -0.005" to 0.005" | Black-Oxide Steel | 0000000 | 00000 |
| For Min. Base Plate Thick. | For Clamp Shank Dia., mm | OD | Bolt Circle Dia. | OD Tolerance Range | Material | Number of Mounting Holes | Mounting Fasteners Included | Each | |
| 3/4" | 13 | 1.3750" | 0.984" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 000000 |
| 3/4" | 16 | 1.4370" | 1.125" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 00000 |
| 1" | 20 | 1.6873" | 1.362" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 00000 |
| 1 1/4" | 25 | 2.0623" | 1.644" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 00000 |
| 1 3/8" | 30 | 2.2654" | 1.876" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 00000 |
| 1 1/2" | 35 | 2.6873" | 2.178" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 00000 |
| 2" | 50 | 3.4998" | 2.916" | -0.0004" to 0" | Black-Oxide Steel | 3 | Yes | 0000000 | 000000 |