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  1. #1
    Join Date
    Jul 2011
    Location
    Adelaide
    Posts
    837

    Default Hercus T&C Grinder accessory identification.

    I am hoping I can get some assistance in working out what accessories I have with the T&C grinder I just bought and perhaps try and find out what else would have been available at the time.

    So here are the photos of what I bought can anybody shed some light on them?

    Regards

    Eric
    Attached Images Attached Images

  2. #2
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    6,216

    Default

    Motorised spindle, part of a universal vise, finger holders, internal grinding spindle etc etc.
    Gold, the colour of choice for the discerning person.

  3. #3
    Join Date
    Feb 2012
    Location
    Willunga
    Posts
    114

    Default

    Hi Eric

    I have a later Hercus T&C grinder but with the same accessories as yours.

    //metalworkforums.com/f65/t1951...us+tool+cutter


    There is information about the accessories in this, as well as pictures of the original brochure from Bob in WA that shows how the accessories fit together. There are also links to posts from Bob about his machine that shows some accessories that I dont have, including the universal vice.

    At the top of your 3rd picture is the drive for the internal grinding spindle, this fits in place of the main grinding wheel.

    In the 4th picture I think that you have the mount for the grinding wheel guard, a finger holder and the wheel guard.

    In the 8th picture I think that you have one end of jig for grinding between centres.

    Let me know if you would like more info.

    Regards

    Ian

  4. #4
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    71
    Posts
    6,458

    Default

    Hello Eric,

    What does appear to be absent from your collection is the all important tailstock -

    DSC_7479 (Large).jpg

    Bob.

  5. #5
    Join Date
    Jul 2011
    Location
    Adelaide
    Posts
    837

    Default

    Bob,

    I forgot to include the photo of the whole which has the tailstock mounted on the table.

    To tell the truth I don't see how I am going to hold a lathe tool with this assortment of accessories.

    Eric
    Attached Images Attached Images

  6. #6
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    Looks way tooo much trouble to deal with, I'll take it off your hands if you like .
    The mounting with the motor would go to the end away from the tailstock, so that it could be used as a cylindrical grinder, or sharpening a worn tap.
    Photo one is part of the tool holder assembly, there should be another part/s that bolts to the top, that holds the Lathe tool, drill bit or other tooling.
    Kryn
    To grow old is mandatory, growing up is optional.

  7. #7
    Join Date
    Jul 2011
    Location
    Adelaide
    Posts
    837

    Default

    Kryn,

    Happy for you to take it of my hands as soon as they are cold and dead I will even write your name on the bottom of it.

    What it seems to be missing is a way of indexing any tooling and a vice and as you point out parts of the tool holder assembly.

    I looked at Anorak Bob's photos of his #1 and can see a number of desirable accessories. I think the chances of finding originals is pretty low though.

  8. #8
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    71
    Posts
    6,458

    Default

    Hello Eric,

    A cheapish swivel based vice would work for holding lathe tools. The workhead you have is the predecessor to mine. It should be mounted on a swivel base. The drive pulley can be removed and replaced with an indexing plate and an indexing plunger can be mounted in the head's tee slot. The little four jaw chuck will hold your lathe tools and milling cutters.

    You may be interested in these adventures if you intend running the machine on single phase via VFDs - //metalworkforums.com/f65/t1836...83#post1763383

    Bob.

  9. #9
    Join Date
    Jul 2011
    Location
    Adelaide
    Posts
    837

    Default

    Quote Originally Posted by Anorak Bob View Post
    Hello Eric,

    A cheapish swivel based vice would work for holding lathe tools. The workhead you have is the predecessor to mine. It should be mounted on a swivel base. The drive pulley can be removed and replaced with an indexing plate and an indexing plunger can be mounted in the head's tee slot. The little four jaw chuck will hold your lathe tools and milling cutters.

    You may be interested in these adventures if you intend running the machine on single phase via VFDs - //metalworkforums.com/f65/t1836...83#post1763383

    Bob.
    Bob
    Whilst I admire your successful outcome I am going to try a lower risk approach with the small workhead motor.

    A small step up transformer and a 415v VFD derated because I would only be proving single phase 415v.

    I know where there is a transformer for $50 that will do the job. So it shouldn't cost too much to give it a go.

    Regards

    Eric

  10. #10
    Join Date
    Jul 2011
    Location
    Adelaide
    Posts
    837

    Default

    Quote Originally Posted by Anorak Bob View Post
    Hello Eric,

    A cheapish swivel based vice would work for holding lathe tools. The workhead you have is the predecessor to mine. It should be mounted on a swivel base. The drive pulley can be removed and replaced with an indexing plate and an indexing plunger can be mounted in the head's tee slot. The little four jaw chuck will hold your lathe tools and milling cutters.

    You may be interested in these adventures if you intend running the machine on single phase via VFDs - //metalworkforums.com/f65/t1836...83#post1763383

    Bob.

    Hi Bob

    I note the name plate on your workhead motor says 0.15 amps whereas mine says 0.3 amps. How do you figure that yours is a 1/30 hp motor? 415 x 0.15 x sqrt(3) gives me 107 watts input for your motor.

    Now if by some chance my motor really would draw 0.3 amps at 415 volts then it should draw 0.17 amps at 240v and thus give the same power as your motor is I run it from a VFD at 240v.

    So my question is did you ever test the resistance of the windings on your workhead motor and do you know what it was?

    Regards

    Eric

  11. #11
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    71
    Posts
    6,458

    Default

    No figuring on my behalf Eric, the 1/30 hp is simply what F W Hercus indicate on the No. 1 brochure and in the leaflet they call a manual. Bob L performed all the testing on both of the 1's motors. I only performed minor surgery.

    Unfortunately I have no idea of the winding's resistance.

    Bob.

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