MCR Bolt Knob Installation Pics

[Kevin Cram]

I was setting up to install a customer bolt knob today and thought I'd share some photos of the process. Hope you enjoy

Prior to factory knob being turned down

Factory knob turned down to .312"

Handle single point threaded 5/16 - 24 tpi.

KMW Grenade style knob installed

Bolt all cleaned up and back in rifle

 

[geargrinder]

Very nice. It's a bit too long for my taste, but the work is fantastic.

 

[trueblue]

Very nice, Kevin.
I would like it better if it was tapered back into the original bolt handle.
Would that be a hard process to do?
Also, what does this cost as I have some interest.

 

[Kevin Cram]

I must agree, it is a pretty long knob. Trueblue, do you mean trying to blend the round knob into a rectangular handle? Here's another knob I made, it's also pretty long but I just make whatever the customer wants. This one blended in pretty well I think. Badger knobs blend in good too.

 

[trueblue]

Had not thought about how difficult blending a round knob to a square bolt, but that looks good.

 

[toasted]

you ever given any thought to offering that jig for sale? Looks like a winner to me! Maybe through Brownell's.

 

[RoyB]

I believe that jig is available through Pacific Tool

 

[RoyB]

another option

New Universal Bolt Handle Turning Jig - Practical Machinist - Largest Manufacturing Technology Forum on the Web

 

[toasted]

Thanks for the tip.... just checked their site and found it.

 

[Kevin Cram]

I believe that jig is available through Pacific Tool

I've had this fixture that I built for about 5 years. I must admit it's not 100% my idea. I seen the original one Nate Lambeth built and built my own just by looking at his. It took a little bit of design getting the angles correct. The one Pacific Tool has doesn't have any support under the handle. You'll need to center drill the knob and use a live center for support. I built mine with enough support and clamping surface I don't need a live center. .020" per pass at .006" per rev. it only takes about an hour to set up, turn, thread and install the new bolt knob.