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  1. #1
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,665

    Default Your latest project

    What is your latest project in metal... Here is mine, an ISO30-1" arbor for slitting and milling cutters on the milling machine... This one is not perfect as it has 0.05mm runout from me making it the wrong way... I have to make a proper one and use this one for a different project.

    clickable picture..




  2. #2
    Join Date
    May 2010
    Location
    Lower Lakes SA
    Age
    53
    Posts
    2,598

    Default

    RC, care to share your mistake so the rest of us can learn from it?

  3. #3
    Join Date
    Aug 2008
    Location
    near Rockhampton
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    5,665

    Default

    I did not turn the whole arbor in the one setting..Bit I really should have done it between centres.. It was a good exercise anyway and I can salvage it to another application..

    I thought I had it dialled in perfectly but I was obviously wrong..

  4. #4
    Join Date
    Mar 2010
    Location
    Nth Qld
    Posts
    687

    Default

    I'll be interested to hear how you go RC, I've got a lot of 40 tapers planned in future and would appreciate any pointers. Are you going to case harden them?.

  5. #5
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,665

    Default

    I had no plans to harden them....

    Making them is pretty basic, you just need to take care.. I found the hardest is setting the top slide to the correct angle..Not so much setting the angle but finding a correct reference to set it to..

  6. #6
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    4,497

    Default

    Hi RC,

    What is the material that was used?

    It has a good surface finish.

    Grahame

  7. #7
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,665

    Default

    This one is made out of 4140 as it was all I had in 2" size.. I always find 4140 machines beautifully with carbide..

  8. #8
    Join Date
    Apr 2009
    Location
    Ballina N.S.W.
    Posts
    607

    Default Your Latest Project

    Hi .RC.
    You sure don't have to be much off the angle making those tapers, you almost need a fine vernier feed on your compound to adjust the angle only a smiggen at a time. One of my latest projects was turning this piece of Stainless Steel 316 bar into a usable shape, it measured 560 mm long by 65mm diameter. A friend of mine who ventures out to sea fishing asked me would a piece of steel he found be of any use as it had not rusted and had been under water for a while. When I received it I saw why, it had been used to drag something abrasive over it in five different locations along its length, this had worn deep grooves 100mm wide by 2.5 mm deep into the bar about a third of the way around. On top of this it had seven holes around 12mm in diameter drilled into it which had subsequently been filled up by welding, the entire length of it did not have one clear diameter.To be able to grip it in the lathe I had to measure how much material was missing on the best end and add this under one of the chuck jaws, I calculated the centre on the other end and drilled a pilot hole for my live centre to engage in. I could now slowly turn the tailstock end down until I had it round, had to take 8mm of the diameter. I then turned it around and did the same to the other end, at the same time I cleaned up a section in the middle of the bar so that I could mount my fixed steady rest. After all this it was fairly smooth sailing as I could take 1mm deep cuts with carbide bits, the welded areas did protest a little as they were considerably harder than the bar. I ended up with a nice test bar that is almost exactly the same size along its entire length. How would you have done this job? A few photos of the finished bar attached, unfortunately I did not take any of the bar in its original condition.
    Regards Bob

  9. #9
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
    59
    Posts
    4,062

    Default

    Is there any reason why you didnt mount it in a 4 jaw to start with?
    You could of marked the centre and drilled it in a drill press to start with.
    What are you going to test with it?.

  10. #10
    Join Date
    Feb 2007
    Location
    Katherine ,Northern Territory
    Age
    64
    Posts
    736

    Default

    Here's my latest project ,on hold atm . got waylaid by by MFWAF .

    http://www.woodworkforums.com/f44/ho...ttings-119392/

    Kev.
    "Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
    Groucho Marx

  11. #11
    Join Date
    Apr 2009
    Location
    Ballina N.S.W.
    Posts
    607

    Default

    Pipeclay,
    I could have used my four jaw chuck, but felt it would be easier and quicker to use the three jaw as only one area on that end was out of round and it was reasonably easy to adjust that area with a bit of packing for the initial cut. I did work out the centre for the tailstock end and drilled it in my drill press to allow the live centre to be used.I intend to use it to check tailstock alignment quickly with a dial indicator as I have to move my lathe around a bit in the next few weeks as I reorganise my workshop.
    Regards Bob

  12. #12
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
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    59
    Posts
    4,062

    Default

    Do you have a centre in both ends?
    Have you allready turned it between centres?

  13. #13
    Join Date
    Apr 2008
    Location
    Perth
    Posts
    251

    Default Question fo .RC

    .RC

    What lathe did u purchase to replace the one you sold. Is it 3 phase or single phase. Looking to upgrade my lathe is all.

    DD

  14. #14
    Join Date
    Apr 2009
    Location
    Ballina N.S.W.
    Posts
    607

    Default

    Pipeclay,
    I do have a centre in both ends but I have not turned it between centres.
    Bob

  15. #15
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
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    59
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    Default

    Unless you turn it between centres it want give you a true indication on alignment of the tailstock.

    If you move the lathe around on occasions and are concerned with the alignment,you would probably be better off getting another piece of material a bit shorter and checking the headstock alignment first,unless it is dowelled.

    If you do check the headstock dont use the tailstock to support the bar.

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