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914World.com _ 914World Garage _ Drilling for 10mm Roll Pins On New CV Joint.
Posted by: tach Sep 6 2015, 12:56 PM
I ordered new VW type 1 lobro cv joints for my 914 but the 2 roll pin holes need to be bored out to 10mm X 20mm deep. I was wondering if I can just bore out the hole on my drill press with a 10mm drill bit or do I need to have the hole machine larger with a end mill by a machine shop?
Posted by: 914_teener Sep 6 2015, 01:42 PM
I ordered new VW cv joints for my 914 but the 2 roll pin holes need to be bored out to 10mm X 20mm deep. I was wondering if I can just bore out the hole on my drill press with a 10mm drill bit or do I need to have the hole machine larger with a end mill by a machine shop?
A roll pin should be a press fit.
Don't understand your question. Is there no hole in the CV for a roll pin?
Posted by: The Cabinetmaker Sep 6 2015, 01:48 PM
I have used a drill press with good results. Find the biggest drill bit that will fit in the hole. Chuck it in the drill press, insert it in the hole, then clamp the joint to the drill press table. Remove bit and install the ten mm bit. Your bigger hole will be centered. Set the depth of the bit before you drill.
Posted by: tach Sep 6 2015, 02:10 PM
I ordered new VW cv joints for my 914 but the 2 roll pin holes need to be bored out to 10mm X 20mm deep. I was wondering if I can just bore out the hole on my drill press with a 10mm drill bit or do I need to have the hole machine larger with a end mill by a machine shop?
A roll pin should be a press fit.
Don't understand your question. Is there no hole in the CV for a roll pin?
Using a type VW 1 GKN/LOEBRO CV Joint is about the only way to get new CV joint for a 914. GKN/LOEBRO type 1 VW CV joints are setup with 6 bolt holes. Two of the holes need to be sized to fit the roll pins. That is why I have to bore out the 2 holes for the pins.
Posted by: tach Sep 6 2015, 02:11 PM
I have used a drill press with good results. Find the biggest drill bit that will fit in the hole. Chuck it in the drill press, insert it in the hole, then clamp the joint to the drill press table. Remove bit and install the ten mm bit. Your bigger hole will be centered. Set the depth of the bit before you drill.
Thank You
Posted by: Mueller Sep 6 2015, 02:12 PM
I ordered new VW cv joints for my 914 but the 2 roll pin holes need to be bored out to 10mm X 20mm deep. I was wondering if I can just bore out the hole on my drill press with a 10mm drill bit or do I need to have the hole machine larger with a end mill by a machine shop?
I just used a drill press when I was doing them for a while.
Posted by: The Cabinetmaker Sep 6 2015, 02:22 PM
BTW, please use all drill press safety procedures. Make sure your clamps are tight. Little oil couldn't hurt.
Posted by: 914Sixer Sep 6 2015, 07:41 PM
Complete new axles are available from Porsche. They are under $300 depending on which Porsche dealer you find on line.
Posted by: Chris H. Sep 6 2015, 10:48 PM
FYI these are pre-drilled for 10mm roll pins and also have the lip machined in them for the 914/type 4 stub axle gasket. (Scroll down to the Type 1 CV Joints.)
http://tangerineracing.com/transmission.htm
Posted by: Downunderman Sep 7 2015, 01:18 PM
Has anyone just drilled the two roll pin holes and flanges out to 10mm and added a couple of 10mm bolts?
Posted by: 914Mike Sep 7 2015, 05:43 PM
Has anyone just drilled the two roll pin holes and flanges out to 10mm and added a couple of 10mm bolts?
Not understanding what you mean. Drill the flange to take a 10mm bolt and then you have a CV joint with 6 8mm holes? Does not seem to help. I guess you could sleeve it. Seems simpler to drill the CV for the roll pins...
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