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Stop Pins
- Thread starter kamik
- Start date
- Joined
- Aug 31, 1999
- Messages
- 716
I use dowel pins form MSC and I ream the hole for a good fit. I have heard of instances where a screw has broken out on one side of the threaded stop pin variety.
One apparent advantage to the threaded stop pin is the barrel can be made larger or smaller to adjust the lock-up. With a dowel pin set up you can go larger on the dowel pin by drilling a larger hole for a larger pin but it is harder to go down in size.
One apparent advantage to the threaded stop pin is the barrel can be made larger or smaller to adjust the lock-up. With a dowel pin set up you can go larger on the dowel pin by drilling a larger hole for a larger pin but it is harder to go down in size.
Much depends on the blade material you are using....you want something of similar hardness for the stop pin....dont want anything deforming and changing the geometry. Personally I have gone the extra yard and put a 1/8" thru dowel that is held in place by screws (it goes thru the titanium liners/handle) with a very snug fit 440c (hardened) cylinder around it. works great for me. Ken Onion uses 1/8" hardened stainless dowels as described above. Like the man says....use more than screws to hold it in place.
Tom: What about using a stop pin that is much harder than the blade? I can understand not wanting the stop pin too soft, but harder would be better, right?
I was looking through the McMaster catalog and found some carbide drill bushings. Hardness was listed as 91 on Rockwell A scale (= about 77 RC) The question I have is, would I be able to tap this?? In the application I have for it, a tapped stop pin is preferred.
I was looking through the McMaster catalog and found some carbide drill bushings. Hardness was listed as 91 on Rockwell A scale (= about 77 RC) The question I have is, would I be able to tap this?? In the application I have for it, a tapped stop pin is preferred.
carbide is no good for this application.. its brittle and although it can be tapped, you would have to buy some DIAMOND tapping tools......the hardened stainless dowel pins are plenty hard for this application. you would have a hard time tapping the hardened stainless dowels too...they are HARD!