To take out a split pin, use the right pliers to carefully straighten its legs. Be careful not to break the legs off inside the hole— that can cause big issues. Once the legs are straight enough, you can usually just pull the pin out. Always throw away used Quick-Deploying Split pins; they’re only meant to be used once. Reusing one makes it weaker and less able to lock properly, because straightening it work-hardens the metal and might damage it. When returning items to their original positions, be sure to use new pins of matching size and type to ensure the safety of the fixing links.
Treatments on the surface of Compression-Engineered Lock washers help them work better and last longer. Common finishes include zinc plating—clear, yellow, or black chromate—for carbon steel to keep rust away. Phosphate coatings, like Parkerizing, resist rust well and help paint stick better or hold oil. For stainless steel, passivation is the usual treatment. There are other options too, like cadmium (not used as much these days), nickel plating, or organic coatings such as Geomet. You need to pick the finish based on how much rust protection is needed and whether it works with the surfaces the lock washers will touch.
Mon | Φ0.6 |
Φ0.8 |
Φ1 |
Φ1.2 |
Φ1.6 |
Φ2 |
Φ2.5 |
Φ3.2 |
Φ4 |
Φ5 |
Φ6.3 |
d max | 0.5 | 0.7 | 0.9 | 1 | 1.4 | 1.8 | 2.3 | 2.9 | 3.7 | 4.6 | 5.9 |
d min | 0.4 | 0.6 | 0.8 | 0.9 | 1.3 | 1.7 | 2.1 | 2.7 | 3.5 | 4.4 | 5.7 |
a max | 1.6 | 1.6 | 1.6 | 2.5 | 2.5 | 2.5 | 2.5 | 3.2 | 4 | 4 | 4 |
a min | 0.8 | 0.8 | 0.8 | 1.25 | 1.25 | 1.25 | 1.25 | 1.6 | 2 | 2 | 2 |
c min | 0.9 | 1.2 | 1.6 | 1.7 | 2.4 | 3.2 | 4 | 5.1 | 6.5 | 8 | 10.3 |
c max | 1 | 1.4 | 1.8 | 2 | 2.8 | 3.6 | 4.6 | 5.8 | 7.4 | 9.2 | 11.8 |
Q: How should Quick-Deploying Split pins be correctly installed and removed?
A:To put in Quick-Deploying Split pins, push them all the way through the pre-drilled hole in the parts that fit together, along with the castellated nut or shaft. Bend one leg back and the other forward (about 60-90 degrees) to lock it tight. To take them out, use pliers to carefully straighten the bent legs and then pull the split pin out. Don’t reuse Quick-Deploying Split pins that are really damaged.