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Discussion in 'Traditional Folders and Fixed Blades' started by waverave, Aug 24, 2019.
I chucked pin in my drillpress and held a file against it.
I thought what he meant was put the pin stock in the drill and file it down with a file while the drill is spinning.
Knife shop machinists usual refer to pin sizes in decimal, and drill bits in decimal or corresponding size number. A common center pin and bolster pin size is .086", which would be drilled with a number 44 drill. Another common pin size is .093", with the drill being #41. A few useful tools would be a set of pin gauges, a drill/wire gauge, and a Vernier caliper. These help to take a lot of guesswork out of hole/pin sizes.
I got that part but in a previous post he mentioned acquiring drill bits in various sizes...just wasn't sure the context exactly since we were talking about modifying pins.
I do have a drill press and will definitely try that next time
I have also had various issues with pins. I wonder if part of the problem is the tolerances in the manufacturing of the pin stock. Depending on where the pins come from, the diameter may not be super precise.
I started to answer this and got about 5 paragraphs in and erased it because I was rambling terribly. The drill bits are for drilling the pin holes after gluing and placing the covers if they aren’t very close to the right size you’re either drilling the hole too small or too big. Too small and the pin is held by whatever the cover material is which if there is any shearing force may crack the covers. Too big and it has to be peined more and there is the possibility of side to side movement or you have to drill the spring to match which may work but in my opinion it’s not worth the trouble (other opinions may vary) basically for me right now the challenge has been in getting the right drill bit for the size of the hole in the spring pin. I don’t think the other pins matter as much, like the ones that hold the covers on or the back pin. I’ll stop before I start rambling again.
Got it thank you You are saying it is best to have a good variety of bits that properly fit the existing holes and then grind down a pin to size...which makes perfect sense. I have been using a 1/16", 5/64" and 3/32" bit primarily...which correspond to my pin stock sizes.
Thanks for the feedback!
That’s pretty much what I’m talking about except with a hand drill
I’ve seen the decimal pin stock which corresponds to a fraction but I haven’t seen these drill bit sizes, but I haven’t found any pins that are the proper size for the pre-existing holes in at lease GEC, Dwight Devine or a case knife, what’s worse is that the different holes seem to be drilled to different sizes. I’ll check into those bits thanks
That certainly may be the case because I’ve have a few where a very small amount needed to be removed from the pin for it to fit.
Edited to remove rambling
That’s exactly what I had started out doing and am just recently doing it the new way because of a few issues I’ve noticed, none catastrophic though.
Finally had time to work on things...and got this project done (the right way this time).
It still cost me a few more 1/32" router bits but it went a lot better this time. I stuck a .008" feeler in between the blade and liner when I peened the pivot pin and it worked great.
Next I need to work on getting the pivot pin to blend with the bolsters better...not easy to do!
Anyway, I really like how this turned out.
That’s looking good. I read about putting the feeler gauge between the blade and liner when I started modding a couple years ago but for some reason never got one, I like making things dumber and more difficult I guess. Maybe try just piening more the bolsters won’t break and the only issue with the pivot pin is over tightening the joint and locking it up which shouldn’t be an issue with a shim in there, also feathering the outer edges of the pin works as well but you easily end up with hammer marks that then need to be filed and sanded out but it really reduces the visibility of the pin when you’re done.
Good reading here Darren. I'm getting into recovering myself. I started a knife recently but put it on hold while I remodel my work area and order in some basic tooling for these projects. I purchased a small belt sander. Dremel Moto Saw, Dremel workstation. Calipers and 123 blocks and a granite cutting board. Need to get a dremel router attachment still but my first couple knives I plan to not do shields. Thanks for sharing your experiences. They will be helpful for me!
Great looking knife. I can’t believe you’ve only done a few so far. You’re progressing faster that I am, for sure.
I think you've found your calling... you're progressing rapidly.
Excellent stuff - keep it coming........
Another RR project...this one in Pau Ferro.
Nice job wave !
amazing. great job
Nice. Looks like you figured out how to blend the pivot pin.