I am making some valve retaining E-Clips for my Silver Bullet because the ones I need are no longer carried by MSC or others. They are 0.195" in overall diameter, for a 0.109" groove, and 0.025" thick. Tiny.
I made them out of drill rod and now need to make then a little springy.
How should they be heat treated? Dull red and then quench? Quench in oil or water?
Mosey
Mosey
Actually , hardening small parts can be a challenge. The Issue is that they very rapidly cool and often drop below quench temp. before hitting the quenching fluid from the flame.
Two solutions if its an issue.
First, start with A-2 (Air Hard) and follow Manufacturer instructions.
Second, you can machine a stainless container for the part or parts, and then heat both container and part in the container. The container should be large enough to retain high hardening temps per any machinist handbook.
However in this case, hardening and spring tension are not required with a slight design change. You can machine a slot in round stock for a clip and then machine a pocket in the top of the valve cap to hold it in place.
For future reference where parts with spring action are required.
I would suggest that the parts be machined from spring stock available from a gunsmith supply house such as Brownells and follow hardening/tempering instructions.
Jerry Kieffer