Stripped Stem Threads Problem
10-13-15 | 06:46 AM
#26
Randomhead
Joined: Aug 2008
Posts: 25,930
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From: Happy Valley, Pennsylvania
"I already need dentures" is one of the best answers to this sort of advice that I've seen, but actually the ramifications could be a broken jaw or even neck, which just isn't worth it. I can't tell what size it is, but the style of that stem may mean that it's 1 1/8", so harder to find a replacement. But I wouldn't use it.
10-13-15 | 06:53 AM
#27
Senior Member
Joined: Feb 2014
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From: Cabot, Arkansas
Bikes: Lynskey Twisted Helix Di2 Ti, 1987 Orbea steel single speed/fixie, Orbea Avant M30, Trek Fuel EX9.8 29, Trek Madone 5 series, Specialized Epic Carbon Comp 29er, Trek 7.1F
As a last ditch effort you could try running a course thread tap through it and use a matching bolt. The more aggressive course threads are a little larger and might hold but it might vibrate loose periodically and need retightening.
10-13-15 | 08:14 AM
#28
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From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Not necessarily so. For the same major diameter a course thread uses a smaller tap drill diameter. So a stripped fine thread, in a hole, has less material the what the course tap wants. You are correct if the stripped part was a male threaded bolt though. Andy.
10-13-15 | 10:02 AM
#29
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From: La La Land (We love it!)
Bikes: Gilmour road, Curtlo road; both steel (of course)
10-13-15 | 10:06 AM
#30
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From: La La Land (We love it!)
Bikes: Gilmour road, Curtlo road; both steel (of course)
Regular machine nuts are generally of better quality than wing nuts and would be preferable if it fits. But a new (or used) stem would be my choice. Extra points for a stem with a 4-bolt plate; no single point of failure. Having your bars come off is only funny in the cartoons.
The wings would keep it from spinning so it could get tight.
Yes, wing nuts are not as strong as machine nuts but they are still stronger than aluminum.
Just attach that one bolt and then work the cover plate in place over the HB and install the bolt that is not stripped...
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10-13-15 | 10:18 AM
#31
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From: Portland, OR
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
These posts make me cringe. This aluminum stem has asked to be retired. The OP should honor that request, spend $10-15 on a used stem and have his eyes open to replace that in the next couple of years with a stem he knows the history of. Aluminum doesn't last forever. Failures are usually sudden, often while JRA. Failure here will almost certainly involve real injury and $$ to the bike (fork and front wheel often do not do well when stems fail). For this stem., the first failure happened while not riding. Good! Now replace it! And enjoy riding with peace of mind.
Ben
Ben
10-13-15 | 10:24 AM
#32
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From: Llano Estacado
Bikes: old clunker
