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  1. S

    Dimension Question on Drawing

    Good Point, Ill check. ......... Nope not that, though I did notice something that might help a little, need to go digging in srawing standards from yesteryear as these drawings are anything upto 60 years old, and are just maintained instead of redrawn.
  2. S

    Dimension Question on Drawing

    Unfortunatly not that simple, I did for a moment think it meant 0.001" however in the context of the drawing that wouldnt make sense, perhaps it could be a tolerance call out? A bit like the iso limits/fits for holes, but for linear measurements
  3. S

    Dimension Question on Drawing

    I have some prints that I am quoting at the moment and a lot of them have a dimension post-fixed by a K. For commercial reasons I cant post a drawing but one of the more simple ones is a shaft, with 3 diameters to sharp shoulders and it reads along the lines of, 45k long, first shoulder is 10k...
  4. S

    How to Calculate thermal expansion

    Thanks, just what I needed, so basicly its small enough of a change not to stress too much over if I'm understanding correctly. Its all gunna be checked and machined at 20c anyway so it shouldnt be an issue. Just wanted to be sure.
  5. S

    How to Calculate thermal expansion

    I have a shaft in that has a few dia's that are -.01/-.03mm tols on a short section thats 30mm OD, the 30mm section is in the middle of the shaft and is 17mm long. There is also a 12mm -0.01/-0.03mm section each end of the shaft for about 15mm each end. Materal is 316 stainless, and will be...
  6. S

    Any Experience with Nylatron GF30?

    I regularly run small/medium runs (think upt to around 5k parts) in glass filled plastics, peek,ptfe,nylons etc. The key to them is carbide, and sharp carbide The best I have found so far are the high positive rake honed inserts for aluminium. You can get away with normall HSS for short runs...
  7. S

    Is it possible to hold +/- .0002 on a bore in delrin?

    As noted above by Sami Delrin is basicly acetal, however its acetal homopolymer. where as most common acetals are copolymer. Also after extensive talks with GEHR and sustaplas in regards to acetal and its properties (long story don't ask) it will depending on which batch and mill that it comes...
  8. S

    How do you switch off/unwind?

    Well there have been some great replies, some things that are simple enough that I have overlooked them as a source of relaxation. I like the idea of the skydiving but to be fair I would chicken out before actually doing it. Now as it turned out my body decided it was going to make me unwind...
  9. S

    How do you switch off/unwind?

    I didn't think I would be the only one:o welcome to the club! Main main worry about it is I need to switch off so I don't burn out or damage my relationship. For example its christmas eve and I'm designing a retrofit pnumatic collet closer to work with my CNC lathe that has a pain in the...
  10. S

    How do you switch off/unwind?

    For those of us that run their own operation when it comes to weekends, time off, or evenings after work. How do you switch off? I've got this issue at the moment as it seems theres so much going on at work (mostly good things) when I get home all I seem to end up doing is either more work, or...
  11. S

    Sliding head vs Fixed head lathes

    That could be expensive for a one man band:willy_nilly::D Well we shall see what next year brings Thanks for the replies
  12. S

    Sliding head vs Fixed head lathes

    How much difference is there programming a multi axis sliding head along the lines of a Citizen L20 vs a standard platen/turret fixed head? I'm assuming that it would be a fairly massive learning curve to jump from fixed to sliding heads in terms of programming but I may be wrong, what say you all?
  13. S

    Fixturing question?

    I had a thought on how to fixture an up coming job, I can't be specific on what the job is but I'll try to reveal as much to help as possible. Picture a part being a small round part H shaped if you cut it along its axis, or a small tube 3mm long with a flange on each end. Oh and they are...
  14. S

    Shaping Nylon Round Bar Into Hex

    Loose tolerance, and sub 25mm size hex, cant really say more, and in total possibly around 175meters Ill think about the above as one or more combined will give the result I would need thanks
  15. S

    Shaping Nylon Round Bar Into Hex

    Does any one have any tips on how to fairly rapidly machine nylon round bar into hex in say 700mm lengths? Assume manual mill and manual lathes (plus 1 cnc lathe but no live tooling) Thanks Simon
  16. S

    5/8" 8TPI Acme

    OOOh! I like that approach, I was wondering about pie jaws if these come back for a larger run, but the welded puck way seems a whole lot less wastfull than full pie. For this run I'll end up going sami's route, when I get around to it, busy week this week
  17. S

    5/8" 8TPI Acme

    Unfortunatly no CNC mill as of yet, and the table is apparently ending up in a marine environment ah well! Another excuse to want a cnc mill!
  18. S

    Shop owners under 30 - how many?

    Another one here, 27 and been doing it since 22/23. Couldnt find a job so I made one. (well that was the theory)
  19. S

    5/8" 8TPI Acme

    Well I'll be damned, I've been thinking of ways to do it all day, thought I had come up with most viable things and that didn't even cross my mind!!. I think I've even got a chunk of steel that will be big enough. Thanks Sami Now just need to find a skinny acme boring bar!
  20. S

    5/8" 8TPI Acme

    I have a customer (artistic type) that wants some tie rods/bolts for a table he's starting to sell. This is all in 316, now the lucky part is he wants loose threads, the pain bit is its 5/8 8TPI acme, which is find on the rods, but the nuts he wants are square with radiused edges and I'm having...

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