Toybreaker Posted October 23, 2013 Report Share Posted October 23, 2013 (edited) I am a machine shop supervisor in the Navy. I have a ton of machinery at my disposal and don't always have enough work to keep my 42 underlings employed. I would like to get some dimensions for connecting rods basically the big end diameter, small end diameter, actual thickness of the big and small ends(from side to side) and nominal wall thickness at the outside ends. That would make for a good project that would involve Drilling, boring, milling and honing. Long rods are 155mm center to center Stock rods are 110mm center to center I have all kinds of material to work with. I myself am going to make a pair out of titanium, just to say I have a set.... FYI Mine will be made using Mastercam X6 on a Haas VF-2 mill and finish honed on a sunnen honing machine. the underlings will be made out of ChrMo steel, HY80 or some 8000 series steel. with a + or - of .0002 in tolerance on the bore diameter, a perpendicular tolerance of .0005 and, a true position tolerance of .002 on the holes with a .002 on center to center distance Hope someone can help me out. thanks for any info.... I will post some pictures once I get started on these. Edited October 23, 2013 by Toybreaker Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted October 23, 2013 Report Share Posted October 23, 2013 IIRC, Long Rod center to center is 115mm, not 155mm. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted October 23, 2013 Author Report Share Posted October 23, 2013 Fat fingers. guess I should have read it closely before I hit post. yeah 115mm Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted October 23, 2013 Author Report Share Posted October 23, 2013 If Ti wasn't such a bitch to weld correctly a whole crank out of titanium would be awesome.... Expensive as hell but imagine how quick it would rev.... Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted October 23, 2013 Report Share Posted October 23, 2013 I really doubt a Ti crank would have enough rotating mass to keep a bike in power. It might rev quick but it would fall on its face even quicker. JMO Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted October 23, 2013 Report Share Posted October 23, 2013 hot rods 110mm rod small end i.d. : 21 big end i.d. : 29 center to center : 110 small end width: 18 big end width: 17 hot rods 115mm rod small end i.d. : 20 big end i.d. : 28 center to center : 115 small end width: 16 big end width: 16 wiseco lists the exact same numbers as above for there 110 and 115 rod. vesrah's 110 lists the same as the other 110's. a 22x53mm wrist pin is used for all of the above rods. why there are differences in the two rods(not the center to center) with the i.d. and widths is beyond me atm? 1 Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted October 23, 2013 Report Share Posted October 23, 2013 Also, if you want to build rods just buy a 115 rod kit from a sponsor and dimension it yourself. There are places in/on the rod that could be made beefier if a guy chose to do so. KnT also has billet rods for sale they are not Ti. Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted October 23, 2013 Report Share Posted October 23, 2013 Also, if you want to build rods just buy a 115 rod kit from a sponsor and dimension it yourself. There are places in/on the rod that could be made beefier if a guy chose to do so. KnT also has billet rods for sale they are not Ti. ^that's the white way to go about it. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted October 23, 2013 Report Share Posted October 23, 2013 Since you're in the Navy and I pay your salary, I expect to have some of these parts sent to me.. You know, out of the materials I am paying for that you're going to use. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted October 23, 2013 Author Report Share Posted October 23, 2013 Yeah, I buy the materials I use for personal shit. And I would buy a rod to dimension it but do you know what shipping to Guam costs? I bought a 6 ft piece of 1.25 inch stainless for $145 for a Ford 4.6 part (actually 56 of em) shipping was $450. $595 for that shit. Cost more than that to buy it on island. I made a little over $2000 gross on them parts...$40 shipped $5 shipping (USPS Flat rate work here too) $330 for shipping $595 for material $120 for cutting tools/tooling (This cost will last several production runs) $1045 production cost. $1195 net profit... Not bad for about 45 hours of work. Next run will be much cheaper. MSC Direct ships for free to military adresses. So it will be closer to $1800 net profit For the previous poster Ti would work great. there are super light rotating assemblies in all kinds of engines... If you lug it there isn't enough rotational enertia to keep it running but if you keep it off idle all the time it "should" be fine. and that is just bench racing....... Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted October 23, 2013 Author Report Share Posted October 23, 2013 hot rods 110mm rod small end i.d. : 21 big end i.d. : 29 center to center : 110 small end width: 18 big end width: 17 hot rods 115mm rod small end i.d. : 20 big end i.d. : 28 center to center : 115 small end width: 16 big end width: 16 wiseco lists the exact same numbers as above for there 110 and 115 rod. vesrah's 110 lists the same as the other 110's. a 22x53mm wrist pin is used for all of the above rods. why there are differences in the two rods(not the center to center) with the i.d. and widths is beyond me atm? thank you very much! Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted October 23, 2013 Report Share Posted October 23, 2013 ill be a test subject on Ti internals! hahaha All said aside.....it sounds like it would be a good project to undertake.......obviously only if it is done on downtime at your own cost (had to throw that in there to avoid a shit storm....) Please....keep us informed with updates and photos of this project going on....perfect way to keep things new and fresh to enlighten the minds to keep these older technology on the updated side of things. Quote Link to comment Share on other sites More sharing options...
LowlyOilBurner Posted October 24, 2013 Report Share Posted October 24, 2013 Titanium isn't that much of a pain to weld. I've welded plenty of ti. Long pre and post flow times, plus trailing gas nozzle and maybe a backing gas if needed. All that trailing gas and back gas shit prolly won't even be needed if all your doing is welding the crank wheels to the rod pins or whatever. Use a big gas lens like a #8 and lots of post flow time. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted October 24, 2013 Author Report Share Posted October 24, 2013 (edited) I would be happy to try and build a whole crank out of Ti but I need to figure out a way to lock the rod pins in place without welding them. I could broach the the crank pin, mill the slot and use a tool steel key. And also buy some bigger Ti round stock the stator and clutch ends would suck thanks to the metric threads but the rest of it would be pretty simple machining. The personal stuff I do for myself is ALWAYS on my time and materials I buy myself. This isn't Congress where anything goes. If I use Gov't material, or do something for me or a buddy on Navy time my ass is in a sling. However if the Chain of command is on board I can get machining done during working hours if it will further the level of knowledge or continue someones qualifications. These connecting rods could be one of those times. I make parts for ships, aircraft, and submarines with tolerances as tight as + or - .00025 and as large as + or minus .03175 inch. Take into account that the average human hair is .003 inch thick. Edited October 24, 2013 by Toybreaker Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted October 24, 2013 Report Share Posted October 24, 2013 You have a banshee powered shifter kart? Quote Link to comment Share on other sites More sharing options...
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