GUNSMITHING SERVICES: BOLT FLUTING
In 2010 LRI launched a Group Buy that ushered in a new chapter in how this work gets performed. In one month we fluted over 600 bolts!
Since that time we've fluted literally thousands of bolts covering a broad range of manufacturers.
Our service is performed using a state of the art 4 axis cnc mill so that we can offer the very popular helical patterns as well.
What is bolt fluting and why do it?
Bolt fluting is a cosmetic upgrade. About like a fresh set of nice alloy wheels on a car. The long-standing debate about its ability to "scrub" the raceways of foreign material is one that LRI doesn't involve itself with. Bolt fluting does offer some degree of weight reduction, although the gains are probably best described as trivial.
We have never seen any evidence that it creates a liability to the strength or durability of an action.
We treat it as a cosmetic alteration to add a little personality to your rifle. Nothing more. Although a simple cosmetic alteration to the bolt, if fluting is done "wrong" it can impair the proper function of your rifle. LRI's bolt fluting service maintains full functionality of your bolt in all cases.
AS OF 3.13.2018:
LRI DOES NOT FLUTE SAVAGE BOLTS.
IF YOU SEND US A SAVAGE BOLT IT WILL NOT BE FLUTED. WE WILL SEND IT BACK AND YOU WILL NOT BE REFUNDED.
THIS IS NON NEGOTIABLE.
YOU MAY SHIP YOUR BOLT ASSEMBLED OR TORN DOWN. ITS TOTALLY UP TO YOU.
This is a service we offer. You must send LRI your bolt in order to have this done. Simply select the pattern type you want, pay for the service as you normally would a product, print the receipt, and include it with your bolt when you mail it in. We'll perform the work in a few days, and mail it right back to you. Cerakote, polishing, glass bead blast, parkerizing, and our popular Tactical Bolt Knob upgrade is also available. Just include the services you'd like us to do in your shopping cart. Additional services outside of bolt fluting can add a little delay to the delivery time, but not much.
We've done thousands of these so you're in good hands!
Browning X bolts in Long Action calibers:
We've noticed that there seems to be a trend with Browning Long Action X bolts. The rectangular anti-bind insert located down the bolt body varies in location. On the bolts we've inspected, the distances are:
30-06 (.480") case head diameter cartridges in Long action: 1.900" measured from back of the bolt lugs to the forward edge of the insert.
Standard Magnum (.545") case head diameter cartridges in Long action: 1.660" measured from back of the bolt lugs to the forward edge of the insert.
This is important because the timing of the flutes is very dependent upon where this feature is located. Because of this, bolts must be measured prior to fluting to ensure program compatibility.
It is beyond the scope of this listing to cover every specific bolt action design. We enjoy some powerful machining capability at LRI and are happy to consider guns that are more unique in design/function. This is on a case-by-case basis. Types not listed will increase the lead time as the setup and programming must be written and vetted prior to your parts being run. Lead time for this type of work varies and requires a level of patience on your end.
3570 Mayer Ave Ste B
Sturgis, SD 57785
Delivery: Please allow 21 days for rotation through the shop
We offer several distinct patterns available with 2 different cutter geometries.
Pattern "A" and Pattern "B":
Pattern "A" is a faceted shape resembling the splines on a car's axle or PTO shaft on a tractor. It has an industrial appearance that is very popular. The pair of 45* flanks leave a clean, but edge free finish where the flute meets the outer circumference of the bolt body. Doing so means no razor-like edges to tear up hands and fingers.
Pattern "B" is the more conventional radial profile typical on most fluted barrels. With a straight flute, this cutter style often leaves a razor edge, however with the spiral pattern sharp are avoided.
The difference between the two patterns is purely cosmetic. One does not "work better" than the other so the choice is purely personal.
LRI offers fluting in 8 styles, with 2 patterns available for several of the styles.
- "High Helix" (Pattern A or B)
- "Standard Helix" (Pattern A or B)
- "Straight" (Pattern A or B)
- "Wrought Iron"
- "Murder Hornet"
- "Pattern X"
Wrought Iron Pattern:
Pattern A High Helix:
Pattern A Standard Helix:
Pattern A Straight:
Pattern B High Helix:
Browning X-Bolt Long Action, Pattern A - High Helix
The Ruger Precision and Ruger American Rifles, Pattern A:
NOTES AND LIMITATIONS:
This service is limited to PUSH FEED actions only. If you own a Pre 64 type Winchester model 70 action, which features a non-rotating, Mauser-style claw extractor, it cannot be fluted. This is because of the anti bind "lump" present on the outside of the bolt body. There is just no elegant way to add fluting while avoiding this important feature.
Traditionally, LRI has avoided fluting all bolts featuring a fixed/blade type ejector. The blade tends to fall into the flute during operation creating a noticeable "annoying" feeling. With some bolts it will ruin the function altogether. The flute can stop the bolt from rotating into battery because it can lock up in much the same way a mechanic's ratchet works.
We have solved this by preserving the bolt body contour in the path of the ejector. By giving the ejector (the ejector slot is shown on the Sako bolt below) a "line of sight" path to the rear portion of the bolt body near the handle full function is preserved.
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