Rounded Machine Keys
Our machine keys, also known as feather keys, are designed to fill oval keyways completely, reducing stress on the key and shaft. By using them in a closed keyway, you can prevent them from sliding along the shaft axis. The rounded ends of our keys make it easy to slide gears, hubs, and other components into place.
We offer machine keys in different materials, including strong and easy-to-machine steel keys. Zinc-plated steel keys resist corrosion in wet environments. We also have 316 stainless steel keys that have excellent corrosion resistance but are not as strong as steel keys. They may be mildly magnetic.
Our oversized keys are slightly larger than the size listed in the table, which makes them perfect for high-torque applications or to replace a key in a worn keyway. On the other hand, our undersized keys are slightly smaller than the size listed in the table, making them a good choice when you need a slightly looser fit or when you have an inconsistent keyway.
In addition, we offer sacrificial keys that are made of a softer material and will shear off when parts are exposed to excessive force. This prevents damage to expensive equipment. We also have keys that meet ANSI B17.1 specifications, which conform to ANSI standards for dimensions and tolerances. Our undersized metric keys meet DIN 6885 dimensional standards.
Choose from our wide range of machine keys to find the perfect fit for your equipment needs.
| SKU | Specifications Met | Length | Tolerance Rating | Pkg. Qty. | Tolerance, Wd. | Tolerance, Ht. |
|---|---|---|---|---|---|---|
| 316 Stainless Steel | ||||||
| 8mm × 12mm | ||||||
| UA5A_2V131 | DIN 6885 | --- | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V130 | DIN 6885 | 140mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V129 | DIN 6885 | 125mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V128 | DIN 6885 | 110mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V127 | DIN 6885 | 100mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V126 | DIN 6885 | 90mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V125 | DIN 6885 | 85mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V124 | DIN 6885 | 80mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V123 | DIN 6885 | 75mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V122 | DIN 6885 | 60mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V121 | DIN 6885 | 55mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V120 | DIN 6885 | 45mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V119 | DIN 6885 | 40mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V118 | DIN 6885 | 36mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V117 | DIN 6885 | 35mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V116 | DIN 6885 | 32mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V115 | DIN 6885 | 28mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V114 | DIN 6885 | 20mm | Undersized | 1 | -0.043mm to 0.000mm | -0.036mm to 0.000mm |
| 8mm × 10mm | ||||||
| UA5A_2V113 | DIN 6885 | 125mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V112 | DIN 6885 | 110mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V111 | DIN 6885 | 100mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V110 | DIN 6885 | 80mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V109 | DIN 6885 | 75mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V108 | DIN 6885 | 70mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V107 | DIN 6885 | 60mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V106 | DIN 6885 | 56mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V105 | DIN 6885 | 50mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V104 | DIN 6885 | 45mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V103 | DIN 6885 | 40mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |
| UA5A_2V102 | DIN 6885 | 36mm | Undersized | 1 | -0.036mm to 0.000mm | -0.036mm to 0.000mm |