Bolt knob modification

[Bigdude]

A long time ago I sent my bolt handle (Remington 700) to Badger Ordnance so it could be modified to accept their Tactical Bolt Knob. Well, recently I decided that I would like to switch out the bolt knob for a carbon fiber bolt knob. After removing the Badger Ordnance bolt knob and putting on the carbon fiber one, there is approximately .17” of exposed thread on the handle. Now, do I attempt to grind down the bolt handle or lengthen the inside of the bolt knob by drill/tap? Or is there a third option that I am not seeing such as filling in the gap with JB weld or something? Any advice would be appreciated, thanks.

I would prefer not to modify/shorten the bolt handle for fear I would do permanent damage.

 

[deadeye]

I do a LOT of bolt knob installs and would say any form of "filling in" will look cobbed so avoid that.

If it is simply being stopped because it is bottoming out inside, then I would not hesitate to shorten the threaded portion of the handle then give it a little chamfer to start the threads better.

 

[Bigdude]

I do a LOT of bolt knob installs and would say any form of "filling in" will look cobbed so avoid that.

If it is simply being stopped because it is bottoming out inside, then I would not hesitate to shorten the threaded portion of the handle then give it a little chamfer to start the threads better.

What tools do I need to chamfer it?

 

[jetmd]

Put a nut on the threads, making sure it is the same dia/thread pitch. Which for a BadgerOrd knob is 5/16 - 24 NF
After installing the nut cut off however many threads you wish to remove. I would use a Dremel with cutoff wheel or even
a small 4 1/2 electric grinder with a cutoff wheel. You can then chamfer the threaded shank with any of several tools...
A small hand file, your dremel or even a small bench grinder if you are careful. After that remove the nut taking your
time and working the nut off over the area wear you made the cut. If necessary turn the nut off a 1/2 turn, back on a 1/4 turn
and repeat until the nut is completely off. It wouldn't hurt to put a little lube on the threads before removing the nut.
You can do it!

 

[deadeye]

What tools do I need to chamfer it?

If you use a belt sander to take some off, then simply give the end a spin at an angle - chamfer done. If you use a file to take it down, just use your file to knock off the sharp edge forming the chamfer. It will all be inside and out of sight in the end - it is simply needed to start the threads better. Don't overthink it. You just need less length and remove the sharp edge so the knob screws on easy.

 

[Opticsspecialist]

I concur with those above. You can also use a hacksaw with the nut. Finish up by hitting the sharp edges with a file.