I know Helicoiling is usually used on castings to repair stripped threads, but I've stripped a thread on my Sprint style 3/8UNF alloy wheel nut. Can this be Helicoiled ?
O.K. it has to be drilled out but there looks to be plenty of aluminium wall thickness on the sleeve.
I was wondering if there might be a problem with seizing of the new thread due to corrosion as its an alloy nut with a stainless steel Helicoil on a mild steel wheel stud ?
Thanks Tony.
Helicoiling ?
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trackerjack
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Re: Helicoiling ?
I have had to helicoil sprint heads where idiots torque the small 5/16 unc cam bolts to oblivion, so yes indeed it can be done but the expense of the helicoil kit would make it expensive when a new nut can be the cheapest and best route.
Rolls Royce use helicoil when new as you end up with a stronger thread.
The alloy used for wheel nuts is 2014 which is a hard alloy.
Rolls Royce use helicoil when new as you end up with a stronger thread.
The alloy used for wheel nuts is 2014 which is a hard alloy.
track action maniac.
The lunatic is out................heres Jonny!
The lunatic is out................heres Jonny!
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Carledo
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Re: Helicoiling ?
I think if it were a 7/16 nut, which are plentiful, replacing it wouldn't be an issue. But with 3/8 Sprint nuts being like hens teeth served on a bed of rocking horse poo and garnished with unobtanium, helicoiling suddenly seems like a cost/time effective solution.
My only concern is how many removal/refitment cycles a helicoil will tolerate before it stays on the stud.
Steve
My only concern is how many removal/refitment cycles a helicoil will tolerate before it stays on the stud.
Steve
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!
Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!
Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.
Re: Helicoiling ?
I may have some soon, my rear axle which I've just fitted is the larger thread..Carledo wrote:But with 3/8 Sprint nuts being like hens teeth served on a bed of rocking horse poo and garnished with unobtanium, helicoiling suddenly seems like a cost/time effective solution.
Re: Helicoiling ?
I too am looking for a full set of 3/8" Sprint wheel nuts. I don't mind steel ones. The ones sold by Rimmers seem very expensive.
Mike
Mike
Mike
(1969 MGB GTV8, 1977 Dolomite 1850HL, 1971 MGB roadster now all three on the road)
(1969 MGB GTV8, 1977 Dolomite 1850HL, 1971 MGB roadster now all three on the road)
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xvivalve
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Re: Helicoiling ?
If I could be certain about the grade of aluminium alloy used, these would be in production, but as a safety critical item, I dare not!
I may have a single spare 3/8" nut Tony...
I may have a single spare 3/8" nut Tony...
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GrahamFountain
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Re: Helicoiling ?
Don't know what the drill size for 3/8s coils is, but would it be big enough you could helicoil a 7/16ths nut with a 3/8ths coil?
Graham
Went and looked, and the drill size for a 3/8ths helicoil is 25/64ths, i.e. 3/64th smaller than 7/16ths. So it wouldn't be safe.
Graham
Graham
Went and looked, and the drill size for a 3/8ths helicoil is 25/64ths, i.e. 3/64th smaller than 7/16ths. So it wouldn't be safe.
Graham
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.
Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).
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trackerjack
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Re: Helicoiling ?
Alun I wish I could remember where I read it but Porsche 944's have alloy nuts too and the material is definitely Aluminium 2014 grade.xvivalve wrote:If I could be certain about the grade of aluminium alloy used, these would be in production, but as a safety critical item, I dare not!
I may have a single spare 3/8" nut Tony...
track action maniac.
The lunatic is out................heres Jonny!
The lunatic is out................heres Jonny!
Re: Helicoiling ?
The designer of the alloy sprint nuts did had the rest of his working life after he left BL a career at Porsche.
Jeroen
Jeroen
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com
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trackerjack
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Re: Helicoiling ?
What was he doing there? was he helicoiling stripped Porsche nutssoe8m wrote:The designer of the alloy sprint nuts did had the rest of his working life after he left BL a career at Porsche.
Jeroen
track action maniac.
The lunatic is out................heres Jonny!
The lunatic is out................heres Jonny!