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e*clipse · 11-20-2014, 08:09 PM

I've been driving myself nuts trying to find some spline data for the driveshafts.

I have found a little more info on CV joints. There do seem to be some good options, with the Type-2 VW and the Porsche 930 CV's:
Classic VW Bug Beetle Sand Rail Dune Buggy IRS Axle Components

CV Joints 101

http://www.gknservice.com/fileadmin/..._Catalogue.pdf

The second link has all sorts of measurements, EXEPT the spline!

Anyway, the bolt circle diameter for the Type-2 VW (100mm OD) is 86mm. The bolt circle diameter for the Porsche 930 (108mm OD) is 94mm. See pg 5 of 3rd link.

So, what about the shaft splines? The standard Porsche 930 axle spline is 28 splines. However, you can find 30 spline and 33 spline versions (probably more)

They can be found here:
Inner CV Joints

So I e-mailed them to ask the dimensions on the 30 spline 930 hub, and to make a long story short, it's nowhere close to the Mitsubishi 30 spline axle. The pressure angle is different, and it's a LOT larger in diameter.

Here's a link for how ISO splines are defined:
http://www.google.com/url?sa=t&rct=j...80185997,d.cGU

Does anyone have any info on VW mk4 tripod joints? This one looks pretty close (2nd drawing):
CV Joint Drawings

I'm trying to stay away from cutting splines on an existing axle for these reasons:
a) Shafts are hardened; they would need to softened, cut, then re-hardened.
b) OE shafts tend to use rolled splines with involute splines. These cannot match a straight tooth spline, which is what you'd have to cut.
c) I'd need an indexing head for my mill

- E*clipse

11-20-2014, 08:09 PM	#217 (permalink)
e*clipse Permanent Apprentice Join Date: Jul 2010 Location: norcal oosae Posts: 523 Thanks: 351 Thanked 314 Times in 215 Posts	I've been driving myself nuts trying to find some spline data for the driveshafts. I have found a little more info on CV joints. There do seem to be some good options, with the Type-2 VW and the Porsche 930 CV's: Classic VW Bug Beetle Sand Rail Dune Buggy IRS Axle Components CV Joints 101 http://www.gknservice.com/fileadmin/..._Catalogue.pdf The second link has all sorts of measurements, EXEPT the spline! Anyway, the bolt circle diameter for the Type-2 VW (100mm OD) is 86mm. The bolt circle diameter for the Porsche 930 (108mm OD) is 94mm. See pg 5 of 3rd link. So, what about the shaft splines? The standard Porsche 930 axle spline is 28 splines. However, you can find 30 spline and 33 spline versions (probably more) They can be found here: Inner CV Joints So I e-mailed them to ask the dimensions on the 30 spline 930 hub, and to make a long story short, it's nowhere close to the Mitsubishi 30 spline axle. The pressure angle is different, and it's a LOT larger in diameter. Here's a link for how ISO splines are defined: http://www.google.com/url?sa=t&rct=j...80185997,d.cGU Does anyone have any info on VW mk4 tripod joints? This one looks pretty close (2nd drawing): CV Joint Drawings I'm trying to stay away from cutting splines on an existing axle for these reasons: a) Shafts are hardened; they would need to softened, cut, then re-hardened. b) OE shafts tend to use rolled splines with involute splines. These cannot match a straight tooth spline, which is what you'd have to cut. c) I'd need an indexing head for my mill - E*clipse