Hardinge HLV-H Metric threading setup issues - HELP please!
Close
Login to Your Account
Results 1 to 16 of 16
  1. #1
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default Hardinge HLV-H Metric threading setup issues - HELP please!

    Hi folk

    Well I've owned HLV-H's for many years but NOW have a problem that I just can't get my head around!

    I've now a HLV-H Metric (Made by Hardinge UK) and it's the first time ever I've needed to cut an Imperial 1/4" UNC (16TPI)

    For that option with a Banjo and gears shown on page 69 of the Operators Manual, it states:

    16TPI / Knob 2 / 1st gear on stud 25T / 2nd gear on stud 40T / Screw gear 60 / Idler gears 2x 66T

    Now there is NO WAY if I'm correct that the Banjo can take this setup ... I "Think" I've got the correct Banjo but I've tried my other one too and this does not work either.

    I can get near to the setup if I produce a "special" bolt to hold the 25T/40T as the standard on is too short and I'm not aware of needing a "Special" longer bolt"

    hardinge-m2i-01.jpg
    hardinge-m2i-02.jpg
    hardinge-m2i-03.jpg
    hardinge-m2i-04.jpg
    hardinge-m2i-05.jpg

    CLEARLY I've done something wrong but WHAT???

    Many thanks in anticipation

    John

  2. #2
    Join Date
    Apr 2005
    Country
    UNITED STATES
    State/Province
    Maine
    Posts
    322
    Post Thanks / Like
    Likes (Given)
    26
    Likes (Received)
    17

    Default

    Just waking up here, no coffee yet. But perhaps you can try running smaller idler gears? It seems odd that they would call for such big gears for the idler.

  3. #3
    Join Date
    Feb 2006
    Country
    UNITED STATES
    State/Province
    Indiana
    Posts
    12,733
    Post Thanks / Like
    Likes (Given)
    638
    Likes (Received)
    3710

    Default

    "I've now a HLV-H Metric (Made by Hardinge UK) and it's the first time ever I've needed to cut an Imperial 1/4" UNC (16TPI)"

    I don't have that sort of lathe, but I do know that 1/4 UNC has 20 TPI, not 16. It is 3/8 UNC that has 16 TPI.

    I don't know if that helps, but I want to be sure you are trying to set up the correct pitch.

    Larry

  4. Likes Stradbash liked this post
  5. #4
    Join Date
    Jul 2007
    Country
    UNITED KINGDOM
    Posts
    4,664
    Post Thanks / Like
    Likes (Given)
    2440
    Likes (Received)
    2244

    Default

    Swap the location of the 60T idlers and the 25/40T pair. That should allow it all to work. (I think).

    I have enough problems due to the fact that I've got a mixture of 22DP (Hardinge) and 20DP (Myford) change wheels!

  6. #5
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by cinematechnic View Post
    Just waking up here, no coffee yet. But perhaps you can try running smaller idler gears? It seems odd that they would call for such big gears for the idler.
    I did think about smaller iderlers but surely that would affect the overall speed???

    ... and the question still remains why would Hardinge publish gear combinations that don't work on their accessories??

  7. #6
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by L Vanice View Post
    "I've now a HLV-H Metric (Made by Hardinge UK) and it's the first time ever I've needed to cut an Imperial 1/4" UNC (16TPI)"

    I don't have that sort of lathe, but I do know that 1/4 UNC has 20 TPI, not 16. It is 3/8 UNC that has 16 TPI.

    I don't know if that helps, but I want to be sure you are trying to set up the correct pitch.

    Larry
    Well that certainly is one STUPID mistake Larry ... Doh!

    I am wanting to cut 1/4" UNC so for that the second gear on the stud goes up by 10 so now its a 50T

    While writing, looking at image 2 and 5 ... The manual states using the Metric attachment - which is which? (I got both with the machine)

    Many thanks

    John

  8. #7
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by Mark Rand View Post
    Swap the location of the 60T idlers and the 25/40T pair. That should allow it all to work. (I think).

    I have enough problems due to the fact that I've got a mixture of 22DP (Hardinge) and 20DP (Myford) change wheels!
    Hi Mark - THanks very much, will try that now ... While writing do you have a Metric or Imperial HLV-H?

    Many thanks

    John

  9. #8
    Join Date
    Jul 2007
    Country
    UNITED KINGDOM
    Posts
    4,664
    Post Thanks / Like
    Likes (Given)
    2440
    Likes (Received)
    2244

    Default

    Quote Originally Posted by Jersey John View Post
    While writing do you have a Metric or Imperial HLV-H?
    John
    Neither, I've got a 1952 HLV (no -H), Imperial+Metric dials, Imperial leadscrew+box and a metric change wheel banjo.

    As for using different sized idlers, it doesn't matter. 60/60 is the same as 38/38 etc.

    The Hardnge numbers should work. I haven't got the manual/diagram for the metric lathes, but for the Imperial lathes there were two diagrams showing different layouts. Have you got the book of words?

  10. #9
    Join Date
    Mar 2007
    Location
    England UK
    Posts
    1,800
    Post Thanks / Like
    Likes (Given)
    743
    Likes (Received)
    738

    Default

    Mark if you're in need of 22dp gears cut the blanks and I'll glue the teeth on them for you

  11. Likes Mark Rand liked this post
  12. #10
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by Mark Rand View Post
    The Hardnge numbers should work. I haven't got the manual/diagram for the metric lathes, but for the Imperial lathes there were two diagrams showing different layouts. Have you got the book of words?
    Hi Mark, I'm sure we've both got the same manual (Imperial) ... and it just offers two pages to a Metric lathe gearbox setup for imperial threads (P69/70).

    If I could have got away with a die I would LOL

    John

  13. #11
    Join Date
    Feb 2006
    Country
    UNITED STATES
    State/Province
    Indiana
    Posts
    12,733
    Post Thanks / Like
    Likes (Given)
    638
    Likes (Received)
    3710

    Default

    Quote Originally Posted by Jersey John View Post
    ...While writing, looking at image 2 and 5 ... The manual states using the Metric attachment - which is which? (I got both with the machine)

    Many thanks

    John
    On a common USA HLV-H with inch gearbox and 10 TPI lead screw, the standard gear bracket for cutting inch threads not in the box is the smaller (one slot) and the metric bracket is the larger (two slots). So I suppose you need the one with two slots to mount the 127 tooth conversion gear to cut inch threads on a metric machine.

    Larry

  14. Likes Billtodd liked this post
  15. #12
    Join Date
    Feb 2009
    Location
    Colchester UK (where the lathes used to be made)
    Posts
    1,890
    Post Thanks / Like
    Likes (Given)
    1300
    Likes (Received)
    547

    Default

    I've setup a similar imperial thread on one of the metric lathes at work . I couldn't for the life of me remember how , but Larry's reminded me that you need the thicker metric banjo in order for the gears to run past each other and the shafts.

  16. #13
    Join Date
    Jul 2007
    Country
    UNITED KINGDOM
    Posts
    4,664
    Post Thanks / Like
    Likes (Given)
    2440
    Likes (Received)
    2244

    Default

    I didn't look closely enough at John's pictures. You definitely need the two slot banjo, as on the bottom picture!

  17. #14
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by L Vanice View Post
    On a common USA HLV-H with inch gearbox and 10 TPI lead screw, the standard gear bracket for cutting inch threads not in the box is the smaller (one slot) and the metric bracket is the larger (two slots). So I suppose you need the one with two slots to mount the 127 tooth conversion gear to cut inch threads on a metric machine.

    Larry
    Thanks for that Larry ... that's another bit sorted out

    All the best

    John

  18. #15
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by Mark Rand View Post
    I didn't look closely enough at John's pictures. You definitely need the two slot banjo, as on the bottom picture!
    Thanks Mark - as always, greatly appreciate the imput!

    John

  19. #16
    Join Date
    May 2015
    Country
    UNITED KINGDOM
    Posts
    1,075
    Post Thanks / Like
    Likes (Given)
    243
    Likes (Received)
    293

    Default

    Quote Originally Posted by Billtodd View Post
    I've setup a similar imperial thread on one of the metric lathes at work . I couldn't for the life of me remember how , but Larry's reminded me that you need the thicker metric banjo in order for the gears to run past each other and the shafts.
    Hi Bill - Thanks very much for your input, appreciated as always.

    I'm away for a few days but I'll try a new setup when I get back ... hopefully I'll get it right.

    John


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •