Bolt Jewelling

R

reb

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GunNutz
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Hi
I am looking to buy a bolt jewelling jig and brushs any idea where in Canada I could get them.
Brownells will not ship one to Canada.
Thanks Reb
 
I made my own jig and tool. I found a small stainless brush in a dremel tool kit that did an excelent job, problem was that no replacements are available. Seems that Brunnelles and midway have discontinued the brush jeweling tools for some reason. China direct sells them but for $12 each ?!! Seems the current jeweling tools on the market utilize Cra-tex abrasive rubber sticks.
 
Ive seen fellas use a piece of dowel with some lapping compound. The stainless brush idea is good, perhaps a small primer pocket cleaning brush could be used if nothing else is available.
 
Magellann said:
Ive seen fellas use a piece of dowel with some lapping compound. The stainless brush idea is good, perhaps a small primer pocket cleaning brush could be used if nothing else is available.
Click to expand...

Dowels don't conform to a curved surface and are subject to splintering and flaring.
Nylon and brass brushes do not perform well. Aircraft cable is too aggressive and most valve grinding compound is silicon carbide which embeds its self. Not a problem for jeweled/engine turned parts that ONLY have to look pretty and DON'T need to also have close fitting interference fit with other moving parts. SC is an abrasive that just keeps cutting and cutting. Hardened steel valve seats are not subject to embedding but softer rifle bolts are. Embeding can be limited by using a tool that is MUCH softer and more easily impressed than the work piece as well as usinf light feed pressures. This does not completely eliminate the issue however....could be why everyone has gone to Cra-tex

http://rs1202.pbsrc.com/albums/bb375/Ciphery/Mobile%20Uploads/IMG-20150126-00833.jpg~320x480

http://rs1202.pbsrc.com/albums/bb375/Ciphery/Mobile%20Uploads/IMG-20150127-00842.jpg~320x480?t=1425338270
 
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Those are some very good points that I hadn't considered. I meant using a SS primer brush, as thats what I have seen available, and it seems a good alternative.
 
Provided the brush has wire bristles fine enough. Bridle them with layers shrink tubing only leaving 1/8" or less bristles exposed. I suggest trying out your set up on a scrap piece of steel as wire bristles that are too stiff will irreversibly marr the surface
 
The bristles are rather course on the primer brush, but I would try it on a scrap piece first. I'll keep looking at whats available.
 
FYI there are 16 rows of functional jewels .200" in Dia spaced .100" appart, totaling some 1000 individual jewels on that Win M70 bolt.jeweling was done with a rubber tipped bit spun at 175rpm and grit was SC valve grinding paste, prejweling prep was acomplished with various grades of wax polish on a 6" cloth buffing wheel and brought to a mirror shine. Care must be taken to keep the bit trimmed to prevent rogue swirls.clean up was with a soft clean cloth and brake cleaner, wash with brake cleaner FIRST as rubbing off the compound will scratch the surface. The bolt was then electro chemically etched with a maple leaf and my initials.
 
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