Stripped Generator Shaft and Nut. Now what??

[Jrm1080]

Someone please tell me I don’t have to remove the generator to fix this:

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-Constant over thinker
-Figuring it out as I go. (With lots of Samba inquiries)

•’67 Type I mostly original semi daily driver (temperature permitting 🔥☀️)
•’74 Type I work in progress.

[KTPhil]

A new nut and a cleanup of the shaft threads with a die might make it usable. If it won't hold torque, it's time to exchange the generator for a rebuilt unit.

[mukluk]

The armature threads look like it's mostly just the remains of the stripped threads from the nut stuck in them, I'd say there's a pretty good chance they'll clean up just fine. Might want to try a bit less torque with the new nut.
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1960 Ragtop w/Semaphores "Inga"

[Cusser]

I used a die, and then a new nut to fix my generator shaft (can't remember now which VW I did that on).

Remember: no law says you need to stay the original size or thread either !!! Mine's not the factory thread anymore !!!
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297

[RareAir]

The 21mm nut is toast, replace it.

As for the armature shaft, try cleaning it with a thread file. Then chase it with a die
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1947 Typ 11a
1954 Typ 117
1956 Typ 151
1959 Typ 117
1959 Typ 265
1961 356B
1966 Typ 151
1966 Typ 241

[Jrm1080]

So the consensus from others is that this should be an M10 thread but no one seems confident of the thread pitch.
Can anyone enlighten me so I know where to get the correct die?
....In North Phoenix???
....Cusser???
🤔
_________________
-Constant over thinker
-Figuring it out as I go. (With lots of Samba inquiries)

•’67 Type I mostly original semi daily driver (temperature permitting 🔥☀️)
•’74 Type I work in progress.

[mukluk]

M12 1.50
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1960 Ragtop w/Semaphores "Inga"

[sjbartnik]

I don't have access to a Type 1 parts book but the Type 3 parts book shows the generator nut as p/n 111 903 181 (111 prefix indicates part originally a Type 1 part) and some google-fu shows that as an M12 nut with thread pitch 1.5.

I can't vouch for any of that.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650

[Cusser]

[bluebus86]

you can measure the pitch with a ruler, or caliper. pitch is expressed in mm for metric. simply measure peak to peak. best to measure several peaks, and divide

say 5 peaks are measured, thats 4 full pitches ( 2 peaks is one pitch) measure across the 5 peaks and say you get 6 mm. 6 mm divided by 4 pitches is 1.5 mm pitch. ypu can look up on thread tables what pitches are offered say a 1.0 mm, and a 1.5mm, select the closest fit. this way you wont come up with 1.4 as a pitch if your measurements are a bit off, you can figure the correct answer is 1.5 mm as only a 1.5 or 1.0 is offered.

for english threads the pitch is expressed as threads per inch, metric is expressed as length of one pitch


Bug On, Metricly, its German after all,
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Stop introducing dirt into your oil when adjusting valves ... https://www.thesamba.com/vw/forum/viewtopic.php?t=683022

[Jrm1080]

This is Awesome. Thanks everyone. I found what I’m looking for.
_________________
-Constant over thinker
-Figuring it out as I go. (With lots of Samba inquiries)

•’67 Type I mostly original semi daily driver (temperature permitting 🔥☀️)
•’74 Type I work in progress.

[Eric&Barb]

Using a thread chaser instead of a threading die is much better. Chaser will reshape the threads. The die will cut the threads and if off set will cut the threads thinner, causing the nut to be loose/fall off.
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In Stereo, Where Available!

[Cusser]

Russ - I have responded to your PM.
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297

[Cusser]

[Eric&Barb]

Here is a kit for less than $15.00 that has that size.

https://www.amazon.com/METRIC-THREAD-CHASER-RETHRE...ser+metric

A single tap will cost as much.. With the chaser kit one has many more possible tools to fix the next messed up thread.
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In Stereo, Where Available!

[Cusser]

[Cusser]

[Jrm1080]

[fly2kads]

[Jrm1080]