Project of the Month built by mirek111

Help Support Home Model Engine Machinist by donating using the link above or becoming a Supporting Member.
Home Model Engine Machinist > The Tools and Tips > Metals > Titanium for crankshaft?

Thread Tools
Old 03-11-2016, 02:25 AM   #1
Join Date: Jun 2014
Posts: 18
Liked 25 Times on 12 Posts

Default Titanium for crankshaft?

Hi all, haven't posted in awhile, been busy with non-model engine projects. One of those has been making custom muzzle brakes and compensators out of 6/4 gr. 5 Ti, of which I have a decent amount, and it occurred to me that it might be kinda interesting to use it for crank and rod in a small one-lunger, was curious if anyone ever had. The stuff is certainly a pain to work with, but I've become pretty adept at dealing with it's properties, two of which are sort of at odds with each other; abrasion resistant, yet galls. As such, I'm not sure how well it'd do in this role, although I think with proper lubrication, it should be alright.

Just screwing around in a quiet shot today, made this little guy out of some 3/4" (no plans, just wingin' it). The material I have does not deform when cut off-center like some steels, remained true. The rod journal was done with a 1/8" 4 fl carbide cutter on a rotary indexer with 4 jaw chuck

Sixtysixdeuce is offline  
Reply With Quote
Old 03-12-2016, 10:23 AM   #2
Join Date: Dec 2015
Location: Salt Lake City Ut.
Posts: 19
Liked 1 Times on 1 Posts


I've made a lot of engine parts using 6AL4v Ti through the years and one thing I discovered quite quickly was the use of bronze on the turning journals. If you run a roller bearing against the Ti it will rollover the Ti and knock the bearing out real quick. So you will have to run with a hardened sleeve. The best I found is a bronze sleeve or bushing will eliminate the gall factor. Keep in mind on your Ti parts about the elongation factor of the Ti. I don't have the ratios in front of me right now but if you need info on this I will look it up and post later today.
Good luck on your parts I hope this helps.
1dbweldor is offline  
Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
6AL-4V Titanium rcfreak177 The Break Room 1 09-25-2014 04:37 PM
M10 x 55 titanium AlexW91 Buy / Sell / Trade / eBay 0 02-16-2014 07:37 PM
Titanium SKIPRAT Metals 3 01-03-2010 05:59 PM
Titanium crankshafter General Engine Discussion 14 10-11-2008 08:30 AM
Titanium macona Metals 7 11-21-2007 09:23 AM

Newest Threads

- Top - Member List