Titanium bolts

[Dellortoman]

Another alternative - why not drill a 3 or 4mm  hole through the steel bolt

I assume you mean boring a hole down the centre of the bolt. A 4mm hole 280mm long will remove 27g of metal. Hardly worth the trouble. Besides, where do you get a 4mm drill bit 300mm long?

 

[Lav the impala]

I assume you mean boring a hole down the centre of the bolt. A 4mm hole 280mm long will remove 27g of metal. Hardly worth the trouble. Besides, where do you get a 4mm drill bit 300mm long?

you drill from each end using extra long series drill bits

 

[Dellortoman]

OK, point taken. You can get a 4mm drill bit 160mm long that would do it. But I still reckon it's not worth the effort for the very meagre weight reduction.

 

[Vince]

Its unspring weight so it's a force multiplier.

 

[Paul Marx]

280mm. Is that for a washing machine?

Paul

 

[helicopterjim]

Hard to find anything over 100mm long.

I need 2 x M12 x about 280mmL.

Been to McDermott Aviations web site without luck. Will call them next week as they are a customer of mine.

The Bell 214 rotor head is titanium ....... but none of the hardware is so don't waste your time. Besides ...... I work for McDermott as well and if they had titanium hardware I would have filled my pockets already.

Jim

 

[piranha-bro2]

Its unspring weight so it's a force multiplier.

I hope you don't mean the engine bolts are unsprung weight, Vince?! It's not a Vespa he's talking about!

 

[Vince]

Front and rear axles and lower shock bolts

 

[phil37]

A 4mm hole 280mm long will remove 27g of metal. Hardly worth the trouble.

  Maybe - but think of all the fun you'd have doing it 

 

[chrisk]

  Maybe - but think of all the fun you'd have doing it 

And the amount of 'Gorilla snot in a can' you'd use.

 

[chrisk]

"Is it really worth the hassle and expense of sourcing Ti bolts to save 102g per bolt? 

Now you've really got me thinking ...............  :-\ What would create less wind resistance; 3 or 4mm of L/H thread bolt or R/H thread bolt (bolt) 

 

[MVma]

I got most of my titabium bolts at Pro-Bolt in UK (https://www.pro-bolt.com/). Good quality and finishing, but expensive.
A cheaper option is Titanium Service in France, they have a website in english: https://www.titane-services.eu/epages/230155.sf/en_GB/?ViewObjectPath=%2FShops%2F230155

 

[hochkoenig]

https://www.probolt-germany.com/titanium/titanium-bolts-flanged-hex-race-spec.html

 

[chrisk]

Thank you

 

[piranha-bro2]

Pro-Bolt are UK-based but have websites in many lands, including Oz. But I'm sure you've heard of 'em Chris!

 

[MVma]

Pro-Bolt are UK-based but have websites in many lands, including Oz. But I'm sure you've heard of 'em Chris!

They have a stock also in France.

 

[phil37]

Years back a bloke approached me at Mallory park, asked if I was (still am) Phil Todd and gave me a bag of titanium aircraft sort of rivet/bolts with nuts and some lengths of titanium bar.  He said he worked for a helicopter company - strangely co-incidental, but shortly afterwards 2 helicopters had major accidents in the UK  :-X - Regards - Phil

 

[veravista]

M12 bolt.  Could get a 9mm hole down it 

 

[chrisk]

Pro-Bolt are UK-based but have websites in many lands, including Oz. But I'm sure you've heard of 'em Chris!

Yes, shipping within Australia too, so some stocks are held here too.

 

[piranha-bro2]

I've used a Kwaka Z1000 20mm rear axle with a 10mm hole bored through it for decades without issue. Did the same with a 20mm Ducati front axle without probs as well. Rule of thumb was that you could drill a hole half the bolt OD. Modern front axles have a far bigger ID to OD bore ratio than that.

What would be the shear strength issues if any of drilled M12 engine bolts on say an SF? I certainly wouldn't try it, but just interested.