 Drilling for 10mm Roll Pins On New CV Joint., Use a drill bit or have it machined out. |
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| tach |
 Sep 6 2015, 12:56 PM
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#1
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Member  Group: Members Posts: 79 Joined: 6-November 09 From: Minnesota Member No.: 11,016 Region Association: Upper MidWest  |
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?
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Replies(1 - 10)
| 914_teener |
Sep 6 2015, 01:42 PM
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#2
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914 Guru Group: Members Posts: 5,200 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
QUOTE(tach @ Sep 6 2015, 11:56 AM)  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? |
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| TheCabinetmaker |
Sep 6 2015, 01:48 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
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.
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| tach |
Sep 6 2015, 02:10 PM
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#4
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Member Group: Members Posts: 79 Joined: 6-November 09 From: Minnesota Member No.: 11,016 Region Association: Upper MidWest |
QUOTE(914_teener @ Sep 6 2015, 02:42 PM) QUOTE(tach @ Sep 6 2015, 11:56 AM) 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. |
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| tach |
Sep 6 2015, 02:11 PM
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#5
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Member Group: Members Posts: 79 Joined: 6-November 09 From: Minnesota Member No.: 11,016 Region Association: Upper MidWest |
QUOTE(The Cabinetmaker @ Sep 6 2015, 02:48 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. Thank You |
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| Mueller |
Sep 6 2015, 02:12 PM
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#6
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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QUOTE(tach @ Sep 6 2015, 11:56 AM) 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. |
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| TheCabinetmaker |
Sep 6 2015, 02:22 PM
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#7
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
BTW, please use all drill press safety procedures. Make sure your clamps are tight. Little oil couldn't hurt.
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| 914Sixer |
Sep 6 2015, 07:41 PM
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#8
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914 Guru Group: Members Posts: 8,889 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Complete new axles are available from Porsche. They are under $300 depending on which Porsche dealer you find on line.
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| Chris H. |
Sep 6 2015, 10:48 PM
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#9
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Senior Member Group: Members Posts: 4,031 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest
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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.)
Tangerine Type 1 CVs |
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| Downunderman |
Sep 7 2015, 01:18 PM
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#10
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Senior Member Group: Members Posts: 852 Joined: 31-May 03 From: Sydney, Australia Member No.: 766 Region Association: Australia and New Zealand |
Has anyone just drilled the two roll pin holes and flanges out to 10mm and added a couple of 10mm bolts?
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| 914Mike |
 Sep 7 2015, 05:43 PM
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#11
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Member Group: Members Posts: 330 Joined: 27-January 03 From: San Jose, CA Member No.: 198 |
QUOTE(Downunderman @ Sep 7 2015, 12:18 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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