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new NUBM41 ?

paul1598419

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I bought an M9X0.5 tap several years ago thinking I would get a lot of use out of it. I haven't actually used it at all, but since I do have it, I might try to use it for this purpose now. I had actually forgotten about it until I saw your listings for these taps.
 

RedCowboy

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BowtieGuy had a good idea to get a M9 x 0.5 die to run the lens barrel through when they are slightly oversized, that's better than trying to open up the module especially if there's a diode already pressed in.
 

paul1598419

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I must have missed that. It does sound like a good idea. Especially if it is a little tight. Might have to order a die now.
 

GSS

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The one you linked is a 12mm you want a 9mm, M9 x 0.5 is Metric 9mm x 0.5 pitch and you can get plug which is square shoulder for threading to the bottom of a hole but I like taper for easy start in through holes, either way you want M9 x 0.5

https://www.ebay.com.au/itm/Taraud-...+x+0.5+tap&_from=R40&rt=nc&_trksid=m570.l1313

https://www.ebay.com.au/itm/M9-x-0-...+x+0.5+tap&_from=R40&rt=nc&_trksid=m570.l1313

https://www.ebay.com.au/itm/M1-M12-...+x+0.5+tap&_from=R40&rt=nc&_trksid=m570.l1313

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To fix a lens barrel that's slightly oversized use this : https://www.ebay.com.au/itm/9mm-x-5...+x+0.5+die&_from=R40&rt=nc&_trksid=m570.l1313
How would you hold the lens barrel to run through the die? As the G7 come with no slot cuts. Grind a few slots yourself? Wouldn't think though there would be much holding pressure needed as it would be probably a cleanup pass.:thinking:
 

BowtieGuy

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Hey Billy, sorry I didn't get back to you, but Red is correct, and has some good links to the 9.0 x 0.5mm tap.


How would you hold the lens barrel to run through the die? As the G7 come with no slot cuts. Grind a few slots yourself? Wouldn't think though there would be much holding pressure needed as it would be probably a cleanup pass.:thinking:
Yes, it could be a little tough without slots, but as you said, there isn't usually much resistance unless the threads are really banged up badly; you could, like you also mentioned, cut or file some slots yourself if you had to.

Don't forget, if you're going to cut your own threads from scratch with the die, you'll need a handle for that particular sized die O.D.
 

RedCowboy

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I assume the one I received was missing the screwdriver slots, no problem as I can use it anyway and I can cut my own slots or drill tiny ice pick holes, I expect since we now know these are sanwu lenses that they will typically have screwdriver slots.

I would set the die on a flat table and start the lens carefully, maybe with a pair of hemo's or a screwdriver then run it in and then pick up off the table and run it through with a screwdriver, my example would get slots added by me although I expect they will typically have them.


https://www.ebay.com/itm/M7-9-Zinc-...m=263550668621&_trksid=p2047675.c100005.m1851
 
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