boadman Posted February 16, 2011 Posted February 16, 2011 That's number two recall for these cams. I went out and got myself a .5 equivalent, I'll have to inspect it. Quote
KirkW Posted February 16, 2011 Posted February 16, 2011 That photo is CRAZY! How could something like that get past quality control? Quote
RaisedByPikas Posted February 16, 2011 Posted February 16, 2011 Did they come from the factory like that or did the cracks develop after some use? The first is QC the second is possibly an R&D issue for such new cams. Quote
KirkW Posted February 16, 2011 Posted February 16, 2011 (edited) Did they come from the factory like that or did the cracks develop after some use? The first is QC the second is possibly an R&D issue for such new cams.  "I’d like to alert you of a problem we found today with DMM Dragon Cams. Several DMM Dragon Cam #5 in our inventory have cracks in the aluminum axle boss. These are cracks radiating from where the stem lug is pressed into the aluminum and are visible from the top of the cam as well as the underside." Edited February 16, 2011 by KirkW Quote
kevino Posted February 16, 2011 Posted February 16, 2011 I just called mountain gear, they are sending me a prepaid shipping label and taking care of the rest. Good people! Quote
G-spotter Posted February 16, 2011 Posted February 16, 2011 DMM has a full recall on the 4s and 5s now.  Welcome to DMM Important Safety Notice: Dragon size 4 and 5 Recall  For the safety of all of our customers we are issuing an immediate recall for all Dragon Cams size 4 and 5 with turned axle bosses  More information available here.  http://www.dmmclimbing.com/dragonrecall45.asp?l=en Quote
dennyt Posted February 16, 2011 Posted February 16, 2011 (edited) If it was stress corrosion cracking (SCC), they may not have cracked before they left the factory. But the constant tension from the press-fit could have caused a crack to develop after some time and exposure to a corrosive environment. Certain alloys and tempers of aluminum are more susceptible to SCC than others. 7075-T6 is bad, T7 is better, 7050-t7451 is bomber. For a good read, search for NASA Stress Corrosion Cracking. Edited February 16, 2011 by dennyt Quote
RafalA Posted February 16, 2011 Posted February 16, 2011 This is just bad press... too bad, I was really rooting for the "smaller" guy. Quote
Off_White Posted February 17, 2011 Posted February 17, 2011 I expect DMM will take care of business in a serious and direct manner, and Mountain Gear is a really great shop, points to those guys for checking things out. Quote
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