nek0 Posted August 4, 2009 Report Share Posted August 4, 2009 I've seen hand held ones people have made but nothing like this. Stolen from OTNhttp://www.observedtrials.net/vb/showpost....p;postcount=103Got tired of grinding so I made myself a knurling unit. So far it works great and I have not deformed the rim. Been a machinist for 35 years. Hope the pictures help.It won't crush the rim as long as you apply pressure slowly. Once you knurl the rim the knurling tools will pick up the same pattern. All you're doing is refreshing the pattern after that. Like all things, you have to know when enough is enough. Quote Link to comment Share on other sites More sharing options...
Jitters Posted August 4, 2009 Report Share Posted August 4, 2009 Interesting. I like that you can just load the bike up on it and go. I wonder if it could be set up to make near perfect lines that are perpendicular to the rim face... hmmmm. Quote Link to comment Share on other sites More sharing options...
Dale-Hill Posted August 4, 2009 Report Share Posted August 4, 2009 Looks prity swish IMO.Looks so much wasierthan having to take wheel off and all that balls too. Quote Link to comment Share on other sites More sharing options...
aener Posted August 4, 2009 Report Share Posted August 4, 2009 Looks so much wasierthan having to take wheel off and all that balls too.C'mon... Who really does that, anyway?Looks decent, I reckon. Though a proper knurl, leaving little diamonds there would be better Pads wouldn't last long on one of them though :\ Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 4, 2009 Report Share Posted August 4, 2009 I'd be interested to know how it actually performs from a rider's point of view, rather than just a guy who's made it so you can make it knurled relatively easily. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted August 4, 2009 Report Share Posted August 4, 2009 give me a good old grind anyday Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted August 4, 2009 Report Share Posted August 4, 2009 I like that alot.Matt Quote Link to comment Share on other sites More sharing options...
Greetings Posted August 4, 2009 Report Share Posted August 4, 2009 Jake proposed that a few years ago, wonder if it works.This is why I like OTN, there's lots of people on there who aren't afraid to try and experiment. Quote Link to comment Share on other sites More sharing options...
eMAyaRKay Posted August 4, 2009 Report Share Posted August 4, 2009 (edited) Wasn't this tried ages ago? I've got some image in my head of it being Onza who gave it a go? I'm sure it never worked as well as a grind back then so was dismissed. Anyone else remember? I'm sure there was a picture posted on here about it...edit - Found it. Way back in 2005! http://www.trials-forum.co.uk/forum/index....amp;hl=knurling Edited August 4, 2009 by eMAyaRKay Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 5, 2009 Report Share Posted August 5, 2009 And the Singapore Stop. Just depends on whether the way their knurling is done is better than Onza's, which didn't work that well. That's why I was interested in what a rider had to say about it, rather than some guy who's main claim is that he's been a machinist (Or whatever it was) for 35 years... Quote Link to comment Share on other sites More sharing options...
Rusevelt Posted August 5, 2009 Report Share Posted August 5, 2009 Would be interesting if you could create differently knurling finishes on the sidewalls and then experiement with a grind that disperses water and dust effectively, yet still provide a vice-like bite. Quote Link to comment Share on other sites More sharing options...
RossMcd Posted August 5, 2009 Report Share Posted August 5, 2009 Wouldnt a straight knurl be more appropriate? Although the idea is actually awesome! Id see a straight knurl looking pretty sweet too! it wont be all messy like a grinded rim. I think onza should retry this with their new pro-series pads! would surely test them to the max! Quote Link to comment Share on other sites More sharing options...
Mike Winton. Posted August 5, 2009 Report Share Posted August 5, 2009 YAY another way to ruin your wheels.il stick with smooth i think.plus surely the pressure is too much on both sides in the process? Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 5, 2009 Report Share Posted August 5, 2009 YAY another way to ruin your wheels.il stick with smooth i think.plus surely the pressure is too much on both sides in the process?If by "ruin your wheels" you mean have a stronger brake with better modulation than just plastering as much tar as physically possible on your rim, then yeah, I guess it is? If you mean a way of being able to ride when it's not bone dry outside, then it's that too...As the guy said, if you put too much pressure on it, it'll be putting too much pressure on it. It's no different to grinding a rim - you could just cut straight through the rim with a grinder, but if you do it right you get a good result. Same deal with this. Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted August 5, 2009 Report Share Posted August 5, 2009 It doesn't seem to do that much though... That rims obviously been ground before and this device has added a few light marks to the rim. That would wear out in no time at all in the wet.Edit: Also "The cost of the unit, materials only, and depending on the quality of knurling tools you use is $300.00 to $500.00.". Mmmkay. Quote Link to comment Share on other sites More sharing options...
kyle-livesey Posted August 5, 2009 Report Share Posted August 5, 2009 (edited) stan showed me one at tarty that someone sent in stan seems to believe that it would work just aswell as a grind but last longer. Edited August 5, 2009 by kyle-livesey Quote Link to comment Share on other sites More sharing options...
Rossi Posted August 5, 2009 Report Share Posted August 5, 2009 Tarty gave me a knurled DX32 to test. It looked promising, very rough, constant surface.Unfortunately it didn't work to the same standard as a grind using my proven home made pads. Wore the pads out much faster than usual, and it had nowhere as near as much hold as a grind. Shame really! I did make a mistake though... built the rim up just before Koxx days and didn't ride any street on it whatsoever. Should've tested it on somewhere less extreme as Buthiers! It kinda performed like a smooth rim. No loud squeaking when dragging the brake, plenty of modulation but a serious lack of hold! When you dragged the brake it sounded weird, like a zip being zipped up fast lol. Quote Link to comment Share on other sites More sharing options...
The Duck Posted August 5, 2009 Report Share Posted August 5, 2009 Probably doesn't work as well as a grind... 'Been a machinist for 35 years' that makes him a minimum of 50? Hes not really going to have put it through harsh testing. Quote Link to comment Share on other sites More sharing options...
durkie Posted August 8, 2009 Report Share Posted August 8, 2009 Tarty gave me a knurled DX32 to test. It looked promising, very rough, constant surface.Unfortunately it didn't work to the same standard as a grind using my proven home made pads. Wore the pads out much faster than usual, and it had nowhere as near as much hold as a grind. Shame really! I did make a mistake though... built the rim up just before Koxx days and didn't ride any street on it whatsoever. Should've tested it on somewhere less extreme as Buthiers! It kinda performed like a smooth rim. No loud squeaking when dragging the brake, plenty of modulation but a serious lack of hold! When you dragged the brake it sounded weird, like a zip being zipped up fast lol.yep...that was mine i heard that the knurling got ground off pretty quickly at koxx days. i made a knurling machine back in september and did loads of patterns. the cross-hatch one you got seriously performed the best of all of them (which is, as you know, not very good). but it was fun to make something. better things down the pipeline soon (hopefully). Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted August 8, 2009 Report Share Posted August 8, 2009 what happened to your plasma spray coatings durkie? Any good? Quote Link to comment Share on other sites More sharing options...
Muel Posted August 8, 2009 Report Share Posted August 8, 2009 I thought Onza tried knurling and gave it up because it didn't give a rough enough surface?They also tried machining it aswell I seem to remember, which didn't work.Why not make a grinding machine? Something that spins the wheel and grinds it at the same time, so all you have to do is select how harsh a grind you want by changing the speed that the rim passes the disc and how hard it presses into it?Could be done I suppose, probably not cost effective though... Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 8, 2009 Report Share Posted August 8, 2009 Onza's worked, but it only really held in one direction.Regarding a 'grinding machine' - it's never going to be cheaper than a normal grinder for a tenner from your local hardware shop. A bit of experience and a bit of thought mean you can grind it pretty easily and get the result you're after, so I don't see why you'd bother wasting the time trying to make a machine that would just do it for you. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted August 8, 2009 Report Share Posted August 8, 2009 Onza's worked, but it only really held in one direction.Regarding a 'grinding machine' - it's never going to be cheaper than a normal grinder for a tenner from your local hardware shop. A bit of experience and a bit of thought mean you can grind it pretty easily and get the result you're after, so I don't see why you'd bother wasting the time trying to make a machine that would just do it for you.yeah but having something to wack your wheel in, and press a button is so much easier + cooler. Especially if you've got a couple to do. Im rather impartial to using the grinder to spin the wheel up to 10,000 RPM and then grinding f**k out of it Grinding's good, never turn down a good grind! Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 8, 2009 Report Share Posted August 8, 2009 I never really had much of a problem just letting my back tyre down, pushing the tyre to the side, buzzing the rim with the grinder, spinning the wheel a little bit, grind that bit, etc., then pumping the tyre back up. I ran a front disc so it wasn't really a problem, but even when I ran dual HS33s it wasn't too hard to just let the other tyre down and do the same on the front rim... Quote Link to comment Share on other sites More sharing options...
LukasMcNeal Posted August 8, 2009 Report Share Posted August 8, 2009 yeah but having something to wack your wheel in, and press a button is so much easier + cooler. Especially if you've got a couple to do. Im rather impartial to using the grinder to spin the wheel up to 10,000 RPM and then grinding f**k out of it Grinding's good, never turn down a good grind!Also wouldn't a machine give a more consistant,even grind? Quote Link to comment Share on other sites More sharing options...
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