Help with Buck Crosslock Pivot

The screw itself is a two hole security screw, sometimes known as a snake eye. It's a security type of screw head, and they go by trade sizes. It's hard to find dimensions of these things, I think you're looking for a #14 spanner bit. I don't remember Buck ever distributing these tools. In general they don't want customers taking knives apart.
 
dsutton24 said:
The screw itself is a two hole security screw, sometimes known as a snake eye. It's a security type of screw head, and they go by trade sizes. It's hard to find dimensions of these things, I think you're looking for a #14 spanner bit. I don't remember Buck ever distributing these tools. In general they don't want customers taking knives apart.
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Hopefully I won't have to. Just want to be prepared if I have to tighten it up a bit!
 
Ok, I am back to this. Turns out the #14 Spanner bit is too small. I don't see anything bigger than that. I actually asked Buck Customer Service and they said "Those are usually a T6". I couldn't help but laugh, especially since I sent them the photo of the pivot and it is clearly not a torx screw. Jeez, customer service these days.
 
As a hobby machinist I've made similar tools for disasembling old valves. Searching the internet briefly I could not find a chart giving hole spacing dimensions. For quick but not elegant, try some HD snap ring pliers. I once made a tool from a 1/4" socket whose outer diameter matches the outer diameter of the 2 holes then cut away with a Dremel cut off wheel leaving 2 pins. Use with a 1/4" drive socket handle. Another method would to make the driver from a "gunsmith" type screwdriver or bit (Bonanza or Chapman) cutting away the blade leaving 2 pins. All that said, I'd make an exhaustive search on line first.
 
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Perhaps McMaster Carr has the correct size.

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I believe the #16 spanner bit would be too wide. Center to center, I measure the pivot holes at about 0.31 inches. I haven't seen a #15 bit available anywhere. Probably doesn't exist.

The outside diameter of the pivot head is 0.38". The inside of the holes measures 0.21".



 
plb said:
I believe the #16 spanner bit would be too wide. Center to center, I measure the pivot holes at about 0.31 inches. I haven't seen a #15 bit available anywhere. Probably doesn't exist.

The outside diameter of the pivot head is 0.38". The inside of the holes measures 0.21".



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Nice calipers! I love being able to see the fractions and hundredths at the same time.

Measuring the outer diameter of the M16 front sight post tool with .001 calipers I get 0.3875” and you measure the Crosslock at .38. This particular front sight tool is plastic. If I were J jameshowardbsa , I’d be willing to bet the cost of the tool that it’ll work. He’ll have to trim two of the four prongs, and maybe shave the OD the tiniest bit, but I think it’ll work just fine.
 
Culprit99 said:
Nice calipers! I love being able to see the fractions and hundredths at the same time.

Measuring the outer diameter of the M16 front sight post tool with .001 calipers I get 0.3875” and you measure the Crosslock at .38. This particular front sight tool is plastic. If I were J jameshowardbsa , I’d be willing to bet the cost of the tool that it’ll work. He’ll have to trim two of the four prongs, and maybe shave the OD the tiniest bit, but I think it’ll work just fine.
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Those calipers are a little old school, but they sure come in handy and get a lot of use.

There are various adjustable spanner wrenches out there, but the key is to get one with the right size pins to fit in the pivot holes. I measured a couple drill bits and how they fit in the pivot holes and found:

5/64" = 0.078125" = 1.98375mm - slightly loose but should work.
3/32" = 0.09375" = 2.38125mm - very tight, but might work.

Your M16 tool pin diameter of approx. 0.09" might be the perfect fit. I would think a spanner wrench with 2mm pins would work as well.

I would caution against trying to use snap ring pliers. They aren't made to exert a great deal of rotational force. My Crosslock pivot screw is too tight, maybe has thread locker, even though there is side to side blade play. I can't budge the pivot with snap right pliers. Need something beefier.
 
Would it better to take 2 pieces of angle iron put on knife and quench with to keep blade from warping
 
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