Moderator Cynic Posted February 21, 2017 Moderator Share Posted February 21, 2017 Hey, just trying to order some nuts and bolts for the Aprilia and got myself in a cunfuxed state. I know bikes are nominally metric fine, but! I don't actually know what that is . Im seeing 0.8 coarse, 0.8 fine etc. But then there is 1.0 and 1.25 also in both coarse and fine. Feels a stupid question but what do I actually want. I have just got generic catchall kits for UJM in the past, never really thought about what metric fine was as such. Link to comment Share on other sites More sharing options...
matt7chunk Posted February 25, 2017 Share Posted February 25, 2017 Think you'll find that that's the thread pitch (distance between one thread to another) Sent from my SM-G935F using Tapatalk Link to comment Share on other sites More sharing options...
robbo 167 Posted February 25, 2017 Share Posted February 25, 2017 Most use 1.25 metric fine...but from my time with bicycles I know italians use some weird stuff...get a metric thread gauge(looks like a little saw) and then its easy to identify threads. 1 Link to comment Share on other sites More sharing options...
Moderator drewpy Posted February 25, 2017 Moderator Share Posted February 25, 2017 aldi have got tap and die sets in, they are not the very best but they always have a thread guage in there and they are good for chasing threads after painting etc https://www.aldi.co.uk/34-piece-tap-%26-die-set/p/093869111217400 Link to comment Share on other sites More sharing options...
Moderator Cynic Posted February 25, 2017 Author Moderator Share Posted February 25, 2017 11 hours ago, matt7chunk said: Think you'll find that that's the thread pitch (distance between one thread to another) Sent from my SM-G935F using Tapatalk I knew what it was just didn't know WHAT it was if that makes any sense. Like plonking the key on a piano makes a specific music note, couldn't tell you what note though. As I see it now M6 is 1.0 for metric fine and M8 is 1.25. The smaller M5, M4 etc are only one pitch (fine, although between .8 and .6) anyway unless you want to special order. Link to comment Share on other sites More sharing options...
Campaman Posted February 27, 2017 Share Posted February 27, 2017 For clarity M6 X 1 and M8 X 1.25 are both metric coarse pitch, fine would be M6 X 0.75 (Non-Preferred) and M8 X 1 You can specify and get fine pitches in the smaller parts but they are classed as Non-Preferred in the standards, we actually produce a M8 X 0.5 Nut for a German company which would be classed as Extra, Extra Fine pitch. Link to comment Share on other sites More sharing options...
AndrewElvisFan Posted February 27, 2017 Share Posted February 27, 2017 This helped me when I had to re tap a fine M8 on my car brakes. Link to comment Share on other sites More sharing options...
Moderator Cynic Posted February 27, 2017 Author Moderator Share Posted February 27, 2017 Hey Andy, where have you been? Link to comment Share on other sites More sharing options...
AndrewElvisFan Posted February 27, 2017 Share Posted February 27, 2017 Hi Jase! Been really busy at home - wife still not well after her broken leg in July and had to have so much time off work they let me go last week. Got time to be about on here now though [emoji3] Link to comment Share on other sites More sharing options...
slice Posted February 28, 2017 Share Posted February 28, 2017 Hi Andrew nice to hear from you mate. 1 Link to comment Share on other sites More sharing options...
anyoldiron Posted March 12, 2017 Share Posted March 12, 2017 On 2/25/2017 at 3:29 AM, drewpy said: aldi have got tap and die sets in, they are not the very best but they always have a thread guage in there and they are good for chasing threads after painting etc https://www.aldi.co.uk/34-piece-tap-%26-die-set/p/093869111217400 Problem is dies are tapered so its hard to be accurate, thread gauge is best if you can Link to comment Share on other sites More sharing options...
Moderator drewpy Posted March 12, 2017 Moderator Share Posted March 12, 2017 4 hours ago, anyoldiron said: Problem is dies are tapered so its hard to be accurate, thread gauge is best if you can I've already said there's a thread gauge in the kit! Link to comment Share on other sites More sharing options...
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