Any engineers in the house(stainless steel turning question)

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  • Any engineers in the house(stainless steel turning question)
  • robhughes
    Member

    Evening all.I,m going to get some bushes made up as the guy who rents one of our workshops is very good with metal but does not have a lathe tool to cut stainless.
    Which one do i need to get for him….That is all… 😀

    Premier Icon dropoff
    Subscriber

    You can turn stainless (314 and 316) with HSS tooling, tungsten carbide insert tooling is easier but costlier too.

    legend
    Member

    I take it you mean “reducers” rather than “bushes”? Wouldn’t want stainless bushes

    robhughes
    Member

    Cheers dropoff.I,m sure he must have HSS as he makes quite a lot of stuff.But when i spoke to him on the phone he said he didn’t have the correct tool for it..I,ll speak to him again.. 🙂
    Yer legend.Top hats bud…

    IanMunro
    Member

    303 is probably the easiest to machine. Not the most corrosion resistant but fine for most things. You wouldn’t need any special tooling for it. Plenty of cooling fluid though if you’re taking big cuts.

    If you’ve just got some unknown bit of stainless bar, then your guess is a good as mine 🙂

    legend
    Member

    Sounds like a good time to ditch top hats and go for a “heavy duty” type option

    cheez0
    Member

    rob,

    engineer-speak
    ‘i dont have the right tool for stainless’

    means

    ‘i can’t be arsed to turn those bits for bugger all money’

    stevewhyte
    Member

    As been said, your not talking about bushes, if you are you want something softer than the shaft.

    I would us a tungsten carbide tip for any stainless, even just drilling through relatively thin ss. You can chew through hardend steel drills and lathe tools.

    Lols at cheezo

    HSS should be fine as long as he knows his way around a grinding wheel. Drilling it’ll be the pain in the arse.

    Dino
    Member

    303 & cobalt drills for the holes

    robhughes
    Member

    cheez0,He makes loads of stuff for me for pennies.If he can’t be asred i,ll just put the rent up.Hahaha.
    Thanks guys.All the info i need there..

    coffeeking
    Member

    I’d agree with cheez0 here, looks like a polite ditching.

    HSS will be fine for drilling but a brazed tungsten carbide tipped tool will be better for turning. Will need a diamond lap grinder to sharpen it mind or at the very least a “green-grit (silicon carbide)wheel.
    Tool would probably be a tenner or so.

    bren2709
    Member

    Yes will go along with HSS drills but you must use coolant and lots of!
    As for brazed carbide tipped tools, we are in the 21st century not the dark ages! 😉

    stumpyjag
    Member

    Hi i’m a tooling engineer for Mitsubishi Carbide in the UK. Most of the advice above is correct. You can cut lower grades of stainless with high speed steel tooling although it will wear out quite quickly. If you are only prrducing a few parts it should be fine. If you have more to make sintered carbide inserts are the way to go. We have loads of different grades of insert depending on the exact grade of stainless. If you let me know what standard ISO turning tools your guy has I can send you a couple of samples FOC.

    Cheers

    Cheeky so & so! I realise we have moved on & I use inserted tipped tools myself but for a one- off job I assume it’s probably not worth the outlay.

    bren2709
    Member

    So the time it takes to regrind your brazed tip every time you loose the edge is not costing time?
    Which in reality has a cost!
    Rough out with an old tip then change for new edge for finishing cut, as easy as that!
    TPMR insert £3.50 approx

    How many general or precision engineering workshops use brazed tip tools?…………. Not many I would say!

    Q. For OP… What application do you need your bushes for?

    Can’t argue with your logic in a production environment but perhaps I wrongly assumed the OP only wanted a couple of bushes made.

    cheez0
    Member

    cheez0,He makes loads of stuff for me for pennies

    .. i rest my case.

    bren2709
    Member

    Did you consider this –

    If you say he’s making things for pennies don’t you think it could now be costing him money to manufacture your
    parts?

    Machining usually costs in the region of £25/hr.

    johnellison
    Member

    304 st/steel every time. Best alrounder going. Don’t need any special tools, in fact I find HSS drills go through it better than Ti-Nitride or cobalts. No special tools for turning either.

    316 is VERY expensive compared to 304 and it’s a lot tougher (as opposed to harder, different property), so harder on tools. Oddly 314 is harder than both yet it’s a lower grade than 316.

    robhughes
    Member

    For the -ve among you..The lad has been with us for years and we keep his rent really low.We even drop it for him when the work is slack.He,s a mechanic but is very good at all things metal.Anywho all sorted out now and he,s making up a few for both my full sussers.Obviously i pay for the materials and tools.
    cheez0 ..bren2709 ..Not all people are out to take you…..

    sbob
    Member

    bren2709 – Member

    Machining usually costs in the region of £25/hr.

    T’was a lot more at my old gaff…

    bren2709
    Member

    Rob – glad your sorted!

    Sbob – hourly rate all depends on the application, as stated the £25/hr was a rough guide for manual machining.

    Premier Icon bigdean
    Subscriber

    Stumpyjag- We did an open house for HAAS and mitsubishi tools a few years ago. Some the best tools we have, the ali masters are good along with the 2 tip side and face tool we got.

    Remember some stainless is great to machine (304?) some terrible (316).

    stumpyjag
    Member

    bigdean- where do you work? We do have lots of very good high end tooling!!

Viewing 26 posts - 1 through 26 (of 26 total)

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