Tapered Gib Keys
These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. The gib head makes these keys easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. Keys are tapered along their length. Use them to connect gears and other components with tapered keyways to shafts. Keys are made of steel.
The height of inch keys decreases by 1/8" for every 12" of length. They conform to ANSI B17.1 Class 1 standards for dimensions and tolerances.
For technical drawings and 3-D models, click on a part number.
Machine Key Stock
Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
Steel key stock is an economical choice with good strength. Zinc-plated steel key stock resists corrosion in wet environments. Stainless steel key stock is more corrosion resistant than steel key stock. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic.Brass key stock is corrosion resistant and nonmagnetic. Brass is softer than other metals, so it's often used for shear keys.
Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway. Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
For technical drawings and 3-D models, click on a part number.
Tolerance | ||||||
|---|---|---|---|---|---|---|
| Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Minimum Hardness | Each | |
12" Lg. | ||||||
| 7/16" × 7/16" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 000000000 | 00000 |
| 7/16" × 7/16" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 000000000 | 0000 |
36" Lg. | ||||||
| 7/16" × 7/16" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 000000000 | 00000 |
Tolerance | ||||||
|---|---|---|---|---|---|---|
| Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Minimum Hardness | Each | |
12" Lg. | ||||||
| 3/16" × 7/16" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 000000000 | 000000 |
| 1/4" × 7/16" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 000000000 | 00000 |
| 1/4" × 7/16" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 000000000 | 00000 |
| 5/16" × 7/16" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 000000000 | 00000 |
| 3/8" × 7/16" | Oversized | 0.000" to 0.003" | 0.000" to 0.003" | Rockwell B50 | 000000000 | 00000 |
| 3/8" × 7/16" | Undersized | -0.003" to 0.000" | -0.003" to 0.000" | Rockwell B50 | 000000000 | 00000 |
| 7/16" × 7/16" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 000000000 | 0000 |
| 7/16" × 7/16" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 000000000 | 0000 |
36" Lg. | ||||||
| 7/16" × 7/16" | Oversized | 0.000" to 0.002" | 0.000" to 0.002" | Rockwell B50 | 000000000 | 00000 |
| 7/16" × 7/16" | Undersized | -0.002" to 0.000" | -0.002" to 0.000" | Rockwell B50 | 000000000 | 00000 |
Tolerance | ||||||
|---|---|---|---|---|---|---|
| Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Minimum Hardness | Each | |
12" Lg. | ||||||
| 7/16" × 7/16" | Standard | -0.001" to 0.001" | -0.001" to 0.001" | Rockwell B90 | 000000000 | 000000 |
Tolerance | ||||||
|---|---|---|---|---|---|---|
| Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Minimum Hardness | Each | |
12" Lg. | ||||||
| 7/16" × 7/16" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | 000000000 | 000000 |
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 7/16" | 3/4" | 7/16" | 1/2" | -0.0005" to 0" | No. 6 | No | Steel | 0000000 | 00000 |