Bushings: Make vs buy

Joined
Sep 27, 2004
Messages
3,041
Hi,
I'm looking to source some bushings for slipjoints.

Ideally I want a bushing with smaller than a 1/8" ID hole. Perhaps 3/32? I assume smaller may be too small to peen properly or may deform on the peening(this may not matter on a bushing build since the blade revolves around the bushing, not the pivot.)

I am not that concerned about the OD of these, 3/16"-1/4" is probably fine for everything I make and my gut says a larger OD is best.

I've had some trouble sourcing bushings of this ID/OD. Texasknife has all 1/8" ID, same for usaknifemaker. Knifekits as a weird .115ID bushing but thats a bizarre size and perhaps is intended to be reamed to 1/8?

Someplace LONG ago I got a few 1/4"OD with 3/32" interior and those would be perfect.

I want the smaller ID as I can both use smaller stock that matches some other pins I want to use plus blending into the bolsters permanently is overall easier with the smaller stock from what I'd found.

Other option:
I have a 1950's 10" swing Logan 820 lathe and decent tooling that I make blackpowder cannons with. Plenty of chucks, center drills, drillchucks, etc. I'm not sure but I'd think center drilling a 3/32 hole in a 1/4" rod doesnt sound too challenging, nor doe any facing I'd need (I also have a bushing lapper fro usaknifemaker.)

If i were to source raw rod stock for this, what would I buy? I worry mainly because the OD fit to the blade is the most critical so the rod would need to be very precision ground. I'm not entirely comfortable trying to maintain insane tolerances on the OD of these on my older mill since the purchased ones are pretty damn close when they arrive.

Some of the bushings I see available are very cheap from he knifemaker sites but when I look up industrial supplies they can be what seems absurd at 10-15$ per bushing. If I can center drill and slice off 20 of these at a time on my lathe and square the ends in a bushing lapper, I'll do a single bulk batch on my own. If that is a tolerance and QC nightmare to do on a typical metalworking lathe (about 750 pounds stability) it may make more sense to buy these.

What are others doing here?
 
I make my own with 544 bearing bronze rod stock from McMaster. The tolerance is +/- .002 which isn’t gonna blow your socks off, but it’s close enough for the application. You can mic the stock and use over/under reamers and barrel laps if you want to get crazy.
 
AH! I had not found that K&G source...pretty much exactly what I need but I now see I can buy 3 feet of the stock for about 11$ and center drill it for nothing. I assume with a standard bushing lap i'm using to size them I can square them up no matter how I then cut them off the end of the bar.

I'll order a few from K&G and a foot of stock from Mcmaster and compare my time vs cost. $4 a knife isnt very much in the big picture.
 
I make my own with 544 bearing bronze rod stock from McMaster. The tolerance is +/- .002 which isn’t gonna blow your socks off, but it’s close enough for the application. You can mic the stock and use over/under reamers and barrel laps if you want to get crazy.
I am curious, what is your process?
 
I struggle with finding fittings and hardware that I like too.

I tend to make some of them because of that.

It's far easier to make accurate males than females.
Especially since you have a lathe.
 
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