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  1. Replies
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    Just clamp it and bend it cold. Stress reieiving...

    Just clamp it and bend it cold.
    Stress reieiving it now will probably just leave it as bent or worse.
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    Yep, 4140 is the go. Will wear better and not...

    Yep, 4140 is the go.
    Will wear better and not deform the thread when knocking tools out of the quill.
    Built to last.
  3. Replies
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    You wont get it dead level bolting it to the...

    You wont get it dead level bolting it to the concrete anyway.
    Trying to bolt it hard down to the floor may twist the lathe cabinet and bed.
    Larger machine use jacks to adjust the level to remove...
  4. May have to double two pieces of 100 x 50 and get...

    May have to double two pieces of 100 x 50 and get them welded together.
  5. There seems to be a Shell oil called Morlina S2...

    There seems to be a Shell oil called Morlina S2 BL 5 viscosity thats pretty close to Velocite 4.
    Maybe give the Shell tech line a call.
  6. Replies
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    Looks like a Pratt Burnerd. The older ones had a...

    Looks like a Pratt Burnerd.
    The older ones had a little disc with the brand in the counterbore on the face of the chuck.
    http://www.600uk.com/products/machine.asp?id=150
  7. Replies
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    Polish it with emery. Using carbide would leave...

    Polish it with emery.
    Using carbide would leave an undesireable surface finish.
    And you can machine a depth of cut at less than the nose radius and achieve excellent results.
  8. Replies
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    You obviously need to have your garage...

    You obviously need to have your garage temperature and humidity regulated to improve you inaccuracy of your precision manufactured Chinese lathe.
    I'm amazed you got it that good.
  9. To OP, $810 a week sounds about normal for a...

    To OP, $810 a week sounds about normal for a fitter and turner.
    There's better but also worse around.
    Its only overtime rates that make up for what you don't earn, though they are under attack now....
  10. Tighten screw on dial. Engage half nuts on a...

    Tighten screw on dial.
    Engage half nuts on a number you want with tool clear of thread.
    Stop half way along cut thread.
    Adjust topslide to pickup existing thread and check depth.
    Disengage half...
  11. Replies
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    1,380

    Minimum nose radius on your HSS tool will help...

    Minimum nose radius on your HSS tool will help produce a better finish at light feed rates.
    Usual 30m/min surface speed. Feed at .1/rev. Then trial and error.
  12. Replies
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    1,696

    Can work well if your gentle. Fantastic if they...

    Can work well if your gentle.
    Fantastic if they adjustable for tapers.
  13. Replies
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    Have machined a few different designs over the...

    Have machined a few different designs over the years.
    Followed this one with a slightly smaller cast iron version.
    Being cast steel it didn't really have a tough skin to machine through, although...
  14. Replies
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    988

    Unfortunately it went out to customer for...

    Unfortunately it went out to customer for assembly.
    it was about 1600mm long and 400 dia.
  15. Replies
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    988

    Part is a mandrel core that has three segment...

    Part is a mandrel core that has three segment leaves fitted to it for roll steel strip.
    Expands and roll strip onto, then compress and remove roll.
    Core is pushed along shaft to expand and compress...
  16. Replies
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    988

    Casting machining.

    Pics of a mandrel casting I milled recently.
    Was cast in 4140 steel.
    http://i925.photobucket.com/albums/ad100/clubman7/15cc80756e0dc5e0587da6d8bb1243e7_zpsda41b7be.jpg...
  17. Replies
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    Yeah, carbide would be the better option,...

    Yeah, carbide would be the better option, although grinding some nose radius to your HSS tool will help a little.
    Try putting a .7to 1mm radius to help strengthen the cutting edge.
  18. Replies
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    6,598

    Bit to read about Kyocera cermet inserts here:...

    Bit to read about Kyocera cermet inserts here:
    Cermets Get Assertive : Modern Machine Shop
    Generally though with the 0.4 nose radius of the inserts you have, would make them a good finishing and...
  19. Replies
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    Have found using 4140 in tooling creates to much...

    Have found using 4140 in tooling creates to much vibration in the tool, maybe due to the material hardness?
    Probably better with 1030 or 1040.
  20. Replies
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    Fairly large prop. Cost comes out to about ten...

    Fairly large prop.
    Cost comes out to about ten hours labour.
    Bore and key to suit existing shaft.
    sounds about right to me.
  21. You get what you pay for. Best brands I've found...

    You get what you pay for. Best brands I've found are Suttons, Hanita, and Dormer.
  22. Replies
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    Found this info on the net....

    Found this info on the net.
    http://i925.photobucket.com/albums/ad100/clubman7/e0ec3e887045313ae40400a623a4d89a_zps6a2f77c4.jpg...
  23. Replies
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    Have you this company before to make up two gas...

    Have you this company before to make up two gas burners with auto shut off swithches if the gas flame went out.
    Furnace Engineering - Furnace Engineering
  24. Try pricing them cast. May be a cheaper option.

    Try pricing them cast. May be a cheaper option.
  25. Replies
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    Maybe check the float in the spindle first. If...

    Maybe check the float in the spindle first.
    If the bearings are worn you could excessive end float.
    Noise would be worn gears and hopefully not bearings.
  26. Piece of paper or a feeler gauge works too.

    Piece of paper or a feeler gauge works too.
  27. Replies
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    You can buy one cheap enough. Rdgtools HSS...

    You can buy one cheap enough.

    Rdgtools HSS Acme Tap 5 8" x 8 TPI LH High Speed New | eBay


    Don't know of the quality though.
  28. Replies
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    If your welding the ends to something, can't you...

    If your welding the ends to something, can't you cut notches out where you want the bends without cutting through, and then bend them to the angle you want and weld up the joins where it will meet....
  29. Replies
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    See if you can get the facing feed to work. if...

    See if you can get the facing feed to work.
    if it doesn't it probably is the feed screw lock pin and spring.
    Good luck.
  30. Replies
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    Anyway way that works is kosher. One degree...

    Anyway way that works is kosher.
    One degree taper though?
    You couldn't of just cut it square to the axis?
  31. Just dress the grinding point when you fit it...

    Just dress the grinding point when you fit it into the collet.
    Only real drama is when you are using a rotary burr where it will cut on one side.
  32. Replies
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    Probably better to drill and tap the rod before...

    Probably better to drill and tap the rod before you machined the two diameters onto it.
    Would give you greater purchase area, and you can machine off any jaw imprints.
  33. Seem to get better chip flow. Maybe because of...

    Seem to get better chip flow. Maybe because of greater clearances or sharper cutting angles.
    Notice a lot of the drills are coming web thinned now which helps.
    Always grind this in when I...
  34. I hand sharpen drills up to what ever width the...

    I hand sharpen drills up to what ever width the grinding wheel is.
    Funny thing is, I can sharpen a smaller diameter drill to perform better than some new one out of a packet.
    Luckily have a nice...
  35. Replies
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    Its close to mild steel, just a bit tougher....

    Its close to mild steel, just a bit tougher.
    Tends to take the edge off HSS cutters a bit quicker.
    I'd drop your speeds 20% and try to use coolant with or cutting oil with your HSS tools.
  36. Replies
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    Probably SG iron. Vices are made from it as it...

    Probably SG iron.
    Vices are made from it as it has good strength.
    Gets smelly when machined.
    Find the dust can upset your stomach if you breathe in too much.
  37. Replies
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    Bob, your talking 0.0005 to 0.0007 of a mm...

    Bob, your talking 0.0005 to 0.0007 of a mm variation.
    You might find the manufacturing tolerances of the indicators you tested wouldn't
    be this fine when manufactured.
  38. Replies
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    "This is just my uneducated observation, others...

    "This is just my uneducated observation, others may have an explanation for the occurrence. "

    You asked for an explanation.
  39. Replies
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    "Maybe .00002" - .00003". This is just my...

    "Maybe .00002" - .00003". This is just my uneducated observation, others may have an explanation for the occurrence. "
    Your worried you need this sort of accuracy for what reason.
    Unless your using...
  40. Replies
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    Hmm, will stick with what I know. Can still...

    Hmm, will stick with what I know.
    Can still count to ten.
  41. Replies
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    6,163

    The nine inch grinders I've seen normally allow...

    The nine inch grinders I've seen normally allow the side handle to be located on either side of the body of the grinder to allow for right and left handed use of the tool.
    Otherwise safety is a...
  42. Replies
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    Used to buy Dremel but the quality seemed to be...

    Used to buy Dremel but the quality seemed to be gone.
    Tool wouldn't last very long.
    now just buy Bunnings Warrior brand for $40 odd.
    If they blow up, bin it and get another.
    I seem to get at...
  43. Replies
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    Found a drill at work that will do it. 20.5...

    Found a drill at work that will do it.
    20.5 diameter and 580mm cutting length.
    http://i925.photobucket.com/albums/ad100/clubman7/8c9175903b323a31ebe11af7f680f117_zpscd796ed2.jpg
  44. Replies
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    Gun drill as per RayG's post. Easy with the...

    Gun drill as per RayG's post.
    Easy with the right gear.
  45. Thread: Rough finish

    by Clubman7
    Replies
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    Bearings and oiling system may be designed to...

    Bearings and oiling system may be designed to cope with 1600 only.
    could risk seizing a bearing.
  46. Replies
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    Angle grinder with a cutoff wheel. narrow ones...

    Angle grinder with a cutoff wheel.
    narrow ones are good if you have one.
  47. Replies
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    1,775

    Ring MTI Qualos. They are service agents for...

    Ring MTI Qualos. They are service agents for Mitutoyo equipment.
    More than likely a standard Mitutoyo screw they will have in stock.
    M.T.I. Qualos
  48. Replies
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    That dosen't really matter. As long as you fit...

    That dosen't really matter.
    As long as you fit them as a matched pair of halves.
  49. Replies
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    Wonder if Workcover would approve?

    Wonder if Workcover would approve?
  50. Replies
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    Have a look here for grinding up your tool to...

    Have a look here for grinding up your tool to suit the application.
    http://www.discoverlivesteam.com/books/Sharpening.pdf
    Grind on a nice 1mm radius on the cutting edge, and run your lathe at its...
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