Posted February 21, 20178 yr Moderator 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.
February 25, 20177 yr Think you'll find that that's the thread pitch (distance between one thread to another)  Sent from my SM-G935F using Tapatalk  Â
February 25, 20177 yr 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.
February 25, 20177 yr Moderator 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
February 25, 20177 yr Author Moderator 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.
February 27, 20177 yr For clarity M6 X 1 and M8 X 1.25 are both metric coarse pitch, fine would be M6 X 0.75 (Non-Preferred)Â 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.
February 27, 20177 yr 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]
March 12, 20177 yr 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
March 12, 20177 yr Moderator 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!
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