V8INtheZ Posted January 20, 2010 Share Posted January 20, 2010 Cool action shot with the metal chips flying through the air Quote Link to comment Share on other sites More sharing options...
Drax240z Posted January 20, 2010 Share Posted January 20, 2010 datrod - Those are some interesting pictures of the process. I think you said heat treating next then cut the splines. How are you going to cut the splines? One at a time in an end-mill? 27 x 40 is more than I can count. Surely there must be a better way. Yeah there is, it's called "hobbing". Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted January 20, 2010 Share Posted January 20, 2010 Yeah there is, it's called "hobbing". Is that the inverse of "Broaching"? Exterior vs interior. Quote Link to comment Share on other sites More sharing options...
Racer Z Posted January 20, 2010 Share Posted January 20, 2010 I send them out to a gear house and they cut the splines. Top quality stuff. Yeah there is, it's called "hobbing". Is that the inverse of "Broaching"? Exterior vs interior. Is it possible to get a few sots of the "hobbing"? Or will that be impossible? Quote Link to comment Share on other sites More sharing options...
johnc Posted January 20, 2010 Author Share Posted January 20, 2010 Probably violates a few obscenity laws. Quote Link to comment Share on other sites More sharing options...
240zip Posted January 20, 2010 Share Posted January 20, 2010 I picked up a nice R180 from a STi with 3.90 on eBay in anticipation of this product being available. Cost was under $300. It did not included the output shafts which seemed to make it undesirable for people trying to do a STi to WRX swap. There seem to be plently of these available in the $300 to $400 range. I plan to use the R180 with the 3.9 with a 280ZX 5 speed transmission. Based on the transmission calculator it should be acceptable with my tires. http://webspace.webring.com/people/cz/z_design_studio/ I'm glad to hear the stock R180 cover works as the R180 from the STi's bolts are a tad long. This should make a nice alternative to the hard-to-find R200's from the 300ZX turbos. Quote Link to comment Share on other sites More sharing options...
datrod Posted January 20, 2010 Share Posted January 20, 2010 Is it possible to get a few sots of the "hobbing"? Or will that be impossible? I really can't do that. I would have to spend to much time to get there and back. So Cal freeways and all. I send the stuff UPS so I don't have to drive. Quote Link to comment Share on other sites More sharing options...
Drax240z Posted January 21, 2010 Share Posted January 21, 2010 From engineers edge: Hobbing manufacturing is a special form of tooling and manufacturing that cuts tooth type geometries. It is the major industrial process for cutting (as opposed to grinding) spur gears of involute form. It forms the gear by rotating the gear blank on a spindle and the cutter on a different spindle at the same time. The cutter is similar to a worm gear, except that it has gashes to form a cutting edge. The hob will make a single revolution for each tooth if it has a single pitch. The hob cutting tool teeth are helical, and when cutting a spur gear form, the axis of the hob tool is inclined from the perpendicular orientation by the helix angle of the hob cutting tool. Hobbing is employed to produce spur gears, involute gears , ACME threads, worm gears, and cycloid gears , however hobbing cannot produce bevel or internal gears. Quote Link to comment Share on other sites More sharing options...
Drax240z Posted January 21, 2010 Share Posted January 21, 2010 Is that the inverse of "Broaching"? Exterior vs interior. Yup. This machine kicks butt. Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 21, 2010 Share Posted January 21, 2010 From engineers edge: It's not that hard to understand the concept behind how these machines operate, but every time I see one do something like this with my own eyes, where the accumulation of errors and tolerances DON'T get in the way, I just grin! That was beautiful. Quote Link to comment Share on other sites More sharing options...
Racer Z Posted January 21, 2010 Share Posted January 21, 2010 Yup. This machine kicks butt. Nice. I did a search on YouTube for "hobbing" and "spline". Watched several more interesting videos. Quote Link to comment Share on other sites More sharing options...
datrod Posted January 21, 2010 Share Posted January 21, 2010 Yup. This machine kicks butt. Yea that's nice on free machining brass. Try that on heat treated 4340 and see what happens. I do love watching that. But that's a very small part on a very limited machine. Still cool to see something move that fast. I wish I could shoot and load video. I would blow your mind with some of the stuff I do. Quote Link to comment Share on other sites More sharing options...
V8INtheZ Posted January 22, 2010 Share Posted January 22, 2010 I wish I could shoot and load video. I would blow your mind with some of the stuff I do. Whoa, we are still talking about machining right? Lol Quote Link to comment Share on other sites More sharing options...
datrod Posted January 23, 2010 Share Posted January 23, 2010 Whoa, we are still talking about machining right? Lol God I hope so. Quote Link to comment Share on other sites More sharing options...
johnc Posted January 27, 2010 Author Share Posted January 27, 2010 FYI... new bolts for these side shafts are NLA from Nissan. I've been working for two months with Courtesy Nissan and Nissan Motorsports and they are just not available. If you buy a set of these side shafts you will have to source the bolts yourself. They can be easily tapped out of any R160, R180, or R200 side shaft. Quote Link to comment Share on other sites More sharing options...
240zip Posted January 27, 2010 Share Posted January 27, 2010 Just to confirm ... they're identical across R160's, R180's and R200's? Quote Link to comment Share on other sites More sharing options...
johnc Posted January 28, 2010 Author Share Posted January 28, 2010 (edited) I know for sure they are identical for the R180 and R200s side shafts that were used in the S30s. M10 x 1.25p 21mm grip length 10.45mm shoulder OD 16mm OD "D" shaped head Edited January 28, 2010 by johnc Quote Link to comment Share on other sites More sharing options...
datrod Posted January 28, 2010 Share Posted January 28, 2010 I'm on the final operation now just FYI for you guy's. I don't know how long it will take to spline them. But I think John might have some ready to ship in a couple of weeks. Quote Link to comment Share on other sites More sharing options...
Cobra_Tim Posted January 28, 2010 Share Posted January 28, 2010 I'm on the final operation now just FYI for you guy's. I don't know how long it will take to spline them. But I think John might have some ready to ship in a couple of weeks. Sir... I owe you a drink... Quote Link to comment Share on other sites More sharing options...
Ricky Ricer Posted January 28, 2010 Share Posted January 28, 2010 For anyone having trouble finding a reasonably priced diff, email or PM me and I will get you in touch with some sellers from Subaru boards (former swapped suby owner). I can't vouch for the products they are selling, it's up to you to decide if they are reputable or not. I will do my best to set you up with some good deals on fairly low mileage diffs. Just let me know! My email is tallicaguitar88 AT gmail dot com Quote Link to comment Share on other sites More sharing options...
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