Inspection and Measuring Fixturing
Use these components in coordinate measuring machine (CMM) applications to raise a workpiece and reliably position it on a fixture plate with 1/4"-20 holes. They are not for use in machining applications.
For technical drawings and 3-D models, click on a part number.
Hold-down clamps thread directly into a fixture plate, tower, or compatible component. Slide the clamp down its shaft and press into place against the workpiece for a light hold. They're also known as tension spring clamps. Wire clamps have a slimmer profile than standard, making them good for clamping small parts or minimizing contact area for additional visibility.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Reach | Ht. | Size | Pitch, mm | Lg. | Material | Tip Finish | Each | |
Standard | ||||||||
| 13/16" | 2" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 000000 |
| 1 9/16" | 2 3/4" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 00000 |
| 1 9/16" | 2 3/4" | 1/4"-20 | __ | 1/4" | Aluminum | Rubber Coated | 0000000 | 00000 |
| 2 5/16" | 2 3/4" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 00000 |
| 2 5/16" | 2 3/4" | 1/4"-20 | __ | 1/4" | Aluminum | Rubber Coated | 0000000 | 00000 |
| 3 7/16" | 3" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 00000 |
| 21mm | 50mm | M4 | 0.7 | 4.496mm | Aluminum | __ | 0000000 | 00000 |
| 21mm | 50mm | M6 | 1 | 6.223mm | Aluminum | __ | 0000000 | 00000 |
| 38mm | 50mm | M4 | 0.7 | 4.496mm | Aluminum | __ | 0000000 | 00000 |
| 38mm | 75mm | M6 | 1 | 6.223mm | Aluminum | __ | 0000000 | 00000 |
| 38mm | 75mm | M8 | 1.25 | 6.223mm | Aluminum | __ | 0000000 | 00000 |
| 58mm | 50mm | M4 | 0.7 | 4.496mm | Aluminum | __ | 0000000 | 00000 |
| 58mm | 75mm | M6 | 1 | 6.223mm | Aluminum | __ | 0000000 | 00000 |
| 58mm | 75mm | M8 | 1.25 | 6.223mm | Aluminum | __ | 0000000 | 00000 |
Wire | ||||||||
| 1 1/4" | 1" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 00000 |
| 2" | 2" | 1/4"-20 | __ | 1/4" | Aluminum | __ | 0000000 | 00000 |
Fixture plates have a grid of 1/4"-20 threaded holes spaced 1/2" apart for attaching components. Alpha-numeric markings around the edges of the plates make it easier to identify holes and repeat tasks. Use aluminum plates with CMMs and optical comparators.
Holes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Thick. | Parallel Tolerance | No. of | Style | Thread Size | Ctr.-to-Ctr. | Material | Each | |
| 3" | 3" | 1/2" | 0.0025" | 21 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 000000 |
| 3" | 6" | 1/2" | 0.0025" | 51 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 000000 |
| 6" | 6" | 3/8" | 0.0025" | 121 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 000000 |
| 12" | 12" | 1/2" | 0.005" | 484 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 000000 |
| 18" | 18" | 1/2" | 0.01" | 1,156 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 00000000 |
| 24" | 24" | 3/4" | 0.01" | 2,116 | Threaded | 1/4"-20 | 1/2" | Aluminum | 0000000 | 00000000 |
The height of fixture towers makes them useful for holding large parts. They have a grid of 1/4"-20 threaded holes spaced 1/2" apart for attaching components. Alpha-numeric markings around the edges of the towers make it easier to identify holes and repeat tasks.
Use an angle plate to mount components at a right angle.
Slots | Holes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Lg. | Wd. | No. of | Style | Thread Size | Material | Each | |
| 3" | 1" | 3" | 1 3/4" | 1/4" | 18 | Threaded | 1/4"-20 | Aluminum | 0000000 | 000000 |
Thread | ||||||
|---|---|---|---|---|---|---|
| Dia. | Ht. | Size | Lg. | Material | Each | |
Adjustable Height | ||||||
| 1/2" | 1 7/16"-1 3/4" | 1/4"-20 | 1/4" | Aluminum | 0000000 | 000000 |