cai Posted December 8, 2009 Report Share Posted December 8, 2009 Square holes are only going to be a problem if you file them yourself, they'll end up cracking in the corners.All rims manufactured with square holes will be rouned in the corners to prevent this happening. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted December 8, 2009 Report Share Posted December 8, 2009 I figured that he was just being pedantic. Chucking holes in a rim will always boost stresses a little but it's never really to the extent that it's a real issue, much like on the Trialtechs Quote Link to comment Share on other sites More sharing options...
OD404 Posted December 8, 2009 Report Share Posted December 8, 2009 Yeah, but he appeared to be implying that there was still a problem with that, just that the 'significant' problem was removed. I was curious at to what those 'problems' might be.He's probably refering to the fact that a smaller radius will be a bigger stress riser than a larger radius and given that the radii on the square holes are a lot smaller than the radius of the circular holes, the square holes present themselves as bigger stress risers.However what is missing here is an understanding of the loading in that area. My guess is there isn't much which means that while the smaller radii will have increased stress in that area, the stress magnitude itself is not significant compared with other areas of the rim. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 8, 2009 Report Share Posted December 8, 2009 Bloody engineers Square holes work fine and don't crack, even rough arse ones done with a rasp, job done! Quote Link to comment Share on other sites More sharing options...
OD404 Posted December 8, 2009 Report Share Posted December 8, 2009 Bloody engineers Square holes work fine and don't crack, even rough arse ones done with a rasp, job done!Careful! I'm on your side on this debate Quote Link to comment Share on other sites More sharing options...
Leistonbmx Posted December 8, 2009 Report Share Posted December 8, 2009 Bloody engineers Square holes work fine and don't crack, even rough arse ones done with a rasp, job done!But are their corners at a right angle without a rounded corner? Quote Link to comment Share on other sites More sharing options...
Mark W Posted December 8, 2009 Report Share Posted December 8, 2009 Who's corners? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 8, 2009 Report Share Posted December 8, 2009 But are their corners at a right angle without a rounded corner?Trialtech rims aren't, they have a nice rounded corner, but I have done it in the past with a rough as buggery file and it still doesn't crack. Quote Link to comment Share on other sites More sharing options...
Leistonbmx Posted December 8, 2009 Report Share Posted December 8, 2009 Trialtech rims aren't, they have a nice rounded corner, but I have done it in the past with a rough as buggery file and it still doesn't crack.Hmm, I guess a rounded corner would still be stronger even if you were to crack the corners Castles had their corners changed from square to round, less hard to knock down. Presuming the same is with holes cut out of rims. Lol. Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted December 8, 2009 Report Share Posted December 8, 2009 Castles had their corners changed from square to round, less hard to knock down.Well that was pretty bloody stupid on the castle builders front wasn't it?! Quote Link to comment Share on other sites More sharing options...
OD404 Posted December 8, 2009 Report Share Posted December 8, 2009 Who's corners?Muller's Corners Quote Link to comment Share on other sites More sharing options...
Leistonbmx Posted December 8, 2009 Report Share Posted December 8, 2009 Well that was pretty bloody stupid on the castle builders front wasn't it?!I was giving an example of corners being weaker than rounded corners. Quote Link to comment Share on other sites More sharing options...
Mark W Posted December 8, 2009 Report Share Posted December 8, 2009 www.CheckYourWording.com Quote Link to comment Share on other sites More sharing options...
MadManMike Posted December 8, 2009 Report Share Posted December 8, 2009 square to round, less hard to knock down.square to round, less hard to knock down.square to round, less hard to knock down.square to round, less hard to knock down.square to round, less hard to knock down.square to round, less hard to knock down.square to round, less hard to knock down. Quote Link to comment Share on other sites More sharing options...
davey1991 Posted December 8, 2009 Report Share Posted December 8, 2009 The circus returns in a new guise. Quote Link to comment Share on other sites More sharing options...
dave33 Posted December 9, 2009 Report Share Posted December 9, 2009 doesnt really mean that they wont work to a decent tolerance, because the die and punch must fit each other, other wise bang, get what im sayinglol ok i thought they were going on about the size of the holes,not the profile of the extrution........ not had much to do with them so ll shut up Quote Link to comment Share on other sites More sharing options...
Shaun H Posted December 10, 2009 Report Share Posted December 10, 2009 He's probably refering to the fact that a smaller radius will be a bigger stress riser than a larger radius and given that the radii on the square holes are a lot smaller than the radius of the circular holes, the square holes present themselves as bigger stress risers.However what is missing here is an understanding of the loading in that area. My guess is there isn't much which means that while the smaller radii will have increased stress in that area, the stress magnitude itself is not significant compared with other areas of the rim.Bang on.and yeah I totally agree, hence it not being a significant problem Bloody engineers Sorry, being on placement and having no coursework leaves me wanting to pick holes in stuff just for the sake of debate haha Quote Link to comment Share on other sites More sharing options...
ogre Posted December 10, 2009 Author Report Share Posted December 10, 2009 who has the list of how many TF-ers it takes to change a lightbulb, this thread epitomises it nicely Quote Link to comment Share on other sites More sharing options...
Greetings Posted December 10, 2009 Report Share Posted December 10, 2009 Wow this is a great way to confuse a trials rider. I'm off to write an email to Mercedes asking why the SL 63 is so heavy. Quote Link to comment Share on other sites More sharing options...
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