Lucky Phil Posted May 29 Share Posted May 29 In my continuing journey to improve my machining skills I decided to make replacement Titanium bolts and washers that mount the rear bevel box torque arm bracket to the bevel box. One bolt and two washers done one bolt to go. I've also got enough Ti stock to make a replacement bevel box torque arm bolt as well. Phil 9 Link to comment Share on other sites More sharing options...
gstallons Posted May 29 Share Posted May 29 Do ti fasteners require thread lube or anti-seize when you are assembling ? Link to comment Share on other sites More sharing options...
Lucky Phil Posted May 29 Author Share Posted May 29 4 minutes ago, gstallons said: Do ti fasteners require thread lube or anti-seize when you are assembling ? Yes, copper anti seize. Phil Link to comment Share on other sites More sharing options...
po18guy Posted May 29 Share Posted May 29 1 hour ago, gstallons said: Do ti fasteners require thread lube or anti-seize when you are assembling ? Excellent idea, as they can gall. Link to comment Share on other sites More sharing options...
gstallons Posted May 29 Share Posted May 29 I know stainless steel is "dry" and I wasn't sure about titanium . Link to comment Share on other sites More sharing options...
docc Posted May 30 Share Posted May 30 4 minutes ago, gstallons said: I know stainless steel is "dry" and I wasn't sure about titanium . And I thought a thread sealant/anti-seize or even a lubricant is indicated with any dis-similar metals threaded together? Link to comment Share on other sites More sharing options...
Lucky Phil Posted May 30 Author Share Posted May 30 2 hours ago, docc said: And I thought a thread sealant/anti-seize or even a lubricant is indicated with any dis-similar metals threaded together? The thing people forget with dissimilar metal use is there needs to be some form of electrolyte between the 2 for any issue to arise. Putting dissimilar materials together in a benign environment isn't an issue but in a salt air or salt water laden environment then you can have problems. Phil 1 1 Link to comment Share on other sites More sharing options...
gstallons Posted May 30 Share Posted May 30 Dissimilar metals are the least likely to gall. Think steel shaft/bronze bushing.. Similar metals such as aluminum cannot be threaded together dry . I KNOW . 1 Link to comment Share on other sites More sharing options...
Lucky Phil Posted May 30 Author Share Posted May 30 14 hours ago, gstallons said: Dissimilar metals are the least likely to gall. Think steel shaft/bronze bushing.. Similar metals such as aluminum cannot be threaded together dry . I KNOW . I've used a lot of aluminium fasteners in aluminium cases without anti-seize and never had an issue. It's what I used before Titanium became affordable. They were anodised 7000 series though. A steel shaft in a bronze bushing is a bearing situation not a galling situation we are talking about here. In Ducati oil pumps the driven steel gear rotates on a ground steel post without any galling. Phil 1 Link to comment Share on other sites More sharing options...
Tomchri Posted May 30 Share Posted May 30 Taking apart an old Jap salt water outboard, hmm Cheers Tom. 1 Link to comment Share on other sites More sharing options...
Lucky Phil Posted May 31 Author Share Posted May 31 Second bolt made and fitted. 5 Link to comment Share on other sites More sharing options...
gstallons Posted May 31 Share Posted May 31 On 5/30/2024 at 3:39 AM, gstallons said: Dissimilar metals are the least likely to gall. Think steel shaft/bronze bushing.. Similar metals such as aluminum cannot be threaded together dry . I KNOW . Maybe i should clarify my statement , you cannot have the exact same materials rubbing together or threaded together . They will (most of the time ) gall and become one. This is from experience . I did this after o/hauling a front bevel drive on a Volvo. Just about the time I was checking clearances the outer housing and the inner housing became one . The anodized fasteners became different from the aluminum with the anodizing coating the aluminum. I am pretty sure the oil pump housing was cast iron and the gears were steel. I haven't seen all oil pump housings on this planet so this is a theory. If you are happy assembling things dry , proceed . Link to comment Share on other sites More sharing options...
Lucky Phil Posted June 1 Author Share Posted June 1 Machined up the other special bolt for the rear drive. 4 Link to comment Share on other sites More sharing options...
gstallons Posted June 1 Share Posted June 1 It looks like you do superior machine work ! 1 Link to comment Share on other sites More sharing options...
docc Posted June 1 Share Posted June 1 You know you have fallen in with Class A Geaheads when they all gather to drool over bolts. Those are Class A Drool-able! 6 Link to comment Share on other sites More sharing options...
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