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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An M16 front sight post tool fits the pivot screw for the Buck 293 Inertia perfectly. I’d be curious to know if you ground two of the four posts off if it would fit the Crosslock pivot.

If not, we can measure the Crosslock pivot, draw it up in CAD, and 3D print one.

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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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