View Full Version : Bolt fluting/engraving CNC Pick Heavy
02-05-2009, 12:02 AM
Just set up the 10" rotary axis on my old bridgeport series 1 conversion. Runs on Mach3. I was unsure of the bolt hardness so I was running a little on the slow side.
Test run on some aluminum, engraving was ment for 1.25 so it looks a little wide. Will be engraved on a barrel.
02-05-2009, 01:31 PM
Just for my own curiousity.........why would one flute a rifle bolt??
1. I can see to reduce weight........although I would guess the weight reduction is minimal (I suppose every little bit helps).
2. Maybe it would help reduce friction between bolt and receiver housing.........but wouldn't it just make a whole lot of pockets for dirt and grit to collect in?
02-05-2009, 02:14 PM
I really don't think there is a physical benefit. Sure looks cool though.
There have been some people in my area that want this done, so I am about to take on some work.
02-05-2009, 04:38 PM
Cool, that really makes me want to get a 4th axis set up on my machine.
02-05-2009, 11:28 PM
I will admit that it looks good. Just wondered about the usefullness of it. Good luck with the projects..........
02-06-2009, 06:32 AM
A little less weight and a real big "cool" factor............:D
You should offer this service. Many folks would use it.
Many people feel a fluted bolt is smoother since it has less drag/surface area. Stolle has been doing it for years a standard practice. Most all the custom actions now have it at least as an option.
Very nice work BTW.
The reason for bolt fluting, at least on BR actions, is to give any dirt someplace to go, in order to prevent bolt bind. Remember, typical clearance on a benchrest action is in the .001-.0015 range, vs. .008 or so on average for a Remington 700.
Then the high end makers of push feed guns like Lazzeroni started making guns with it, then it became a trend.:D
02-10-2009, 11:19 PM
Friction, dirt-channeling, and the bolt-flutes hold grease.
Sdeering, that is some nice work! I'd love to have my 917v bolt fluted.
I'm planning a mag. opening-plug and top-mount brace/scope mount to stiffen the action up a bit on mine.
02-11-2009, 03:44 PM
Thanks for the replys fellas. I should be getting the first shipment of bolts to flute soon. I have a 6mm barrel being made for a new 6mmBR project. When I get it engraved I will post some picks.