Spiral fluting?

[SignGuy]

who does spiral bolt fluting in canada? i checked with corlanes and they only do the straight flutes. anyone know where i can get spiral fluting done and what the cost is

 

[Pudelpointer]

I think Leeper does. Send him a PM.

 

[shazam*]

just curious... the spiral fluting looks nice, but does it have a practical purpose?
does it cool better? (like radiator fins?)

 

[SignGuy]

not sure of the practical purposes other then shaving a few oz's off, i want it done for pure and simple LCF *look cool factor* LOL

 

[dan belisle]

just curious... the spiral fluting looks nice, but does it have a practical purpose?
does it cool better? (like radiator fins?)

No more purpose then regular fluting, it just looks cool. - dan

 

[double gun]

If fluting helps cool because of increased surface area, then helical fluting would theoretically be better than straight fluting-as there is more exposed surface area....at least I think it would...???
But if we are talking about bolts where heat isnt an issue-I think the "looks cool factor" is the only benefit.

 

[mercuryv8]

Increased surface are would be sight...probably only a 1/2 inch on each flute.

Nic

 

[dan belisle]

Exactly. The area gained by fluting a barrel (straight or spiral) is tiny. I think you would have a very hard time proving increased cooling efficiency on any particular gun. I'm not saying it doesn't happen theoretically, just that it is an extremely small change. - dan

 

[double gun]

Increased surface are would be sight...probably only a 1/2 inch on each flute.

Nic

Doesnt that depend on the rate of twist? My remington 700 (long action) bolt has helical fluting, and I measured the length of the flute (as best I could) at about 8.5" (4 rotations) compared to a straight flute of about 4.25". So 6X8.5" = 51" of flute compared to straight flutes 6x4.25" = 25.5".

 

[death-junky]

It sounds cool and I bet I looks unreal! But I dont know if it is any better then straight fluting....
ttyal
Riley

 

[Jeremy1]

If you wan't to have the best spiral fluting done weather its on a rifle barrel or a bolt talk to steve or Ross at PGW.Take a look at the Timberwolf and you will see some of the best spiral fluting.

 

[SignGuy]

yeah i think i might have t odo that i know there backed up pretty steady with the DND gear so i was hoping i could get someone else LOL

 

[Rembo]

one advantage to spiral fluting over straight fluting is that spiral flutes will not ratchet on the round in the top of the mag when the bolt is turned.....so there is one advantage besides esthetics...

 

[dan belisle]

Good point Rick, I never thought of that. - dan

 

[SignGuy]

well just got a PM back from PGW they only flute thier own bolts . guess i will have to look south of the border LOL

 

[double gun]

If you are sending it south of the border, check out twistedbarrel.com he seems reasonable.

 

[Mystic Precision]

SG, the only thing to watch for is barrel taper. There seems to be a need for a min amount of material around a bore to maintain accuracy. Depending on who you talk to, it ranges from .18 to .27 in on either side of that bore.

If you are fluting a tapered barrel, they are unlikely to reduce depth of cut as they progress down the pipe so will likely set at the shallowest cut. That reduces the benefits at the 'big' end and reduces the fluting to merely cosmetic.

If they set the milling to cut too deep at the thin end, you may get bulging which is not good for accuracy or safety.

I look at fluting as a great way to balance weight with rigidity. I feel the rigidity of a fluted barrel is better then a 'thinner' barrel of equal weight. All you stress engineers can tell me if I am right or wrong.

The appearance is nice too but for extra cooling - not really significant.

Jerry

 

[SignGuy]

SG, the only thing to watch for is barrel taper. There seems to be a need for a min amount of material around a bore to maintain accuracy. Depending on who you talk to, it ranges from .18 to .27 in on either side of that bore.

If you are fluting a tapered barrel, they are unlikely to reduce depth of cut as they progress down the pipe so will likely set at the shallowest cut. That reduces the benefits at the 'big' end and reduces the fluting to merely cosmetic.

If they set the milling to cut too deep at the thin end, you may get bulging which is not good for accuracy or safety.

I look at fluting as a great way to balance weight with rigidity. I feel the rigidity of a fluted barrel is better then a 'thinner' barrel of equal weight. All you stress engineers can tell me if I am right or wrong.

The appearance is nice too but for extra cooling - not really significant.

Jerry

thanks for the advice,
it isnt the barrel i am getting fluted though its the bolt and then only cause it looks cooler then jeweling

 

[dan belisle]

I believe Douglas barrels offers spiral fluting on some of his barrels, if anyone is interested in that. - dan

 

[mercuryv8]

Doesnt that depend on the rate of twist? My remington 700 (long action) bolt has helical fluting, and I measured the length of the flute (as best I could) at about 8.5" (4 rotations) compared to a straight flute of about 4.25". So 6X8.5" = 51" of flute compared to straight flutes 6x4.25" = 25.5".

Your right. It would depend on the rate...for some reason I was thinking of just a slight spiral. But of course the higher the rate the the greater the surface area gain.

NNic