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  1. [QUOTE=thermite;3442534]Getting full torque at...

    [QUOTE=thermite;3442534]Getting full torque at one revolution every fifteen seconds - as you can do on your 10EE in back-gear by diddling the "zero set" pot on the SSD, is nought but a parlour trick...
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    Yup, once I bit the bullet and started parting...

    Yup, once I bit the bullet and started parting using the power cross-feed (sturdy lathe, admittedly) it all fell into place, haven't parted by hand for years. the almost-constant surface speed helps...
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    At 200 RPM, once you get to a 1/4" diameter, your...

    At 200 RPM, once you get to a 1/4" diameter, your surface speed is down around what, 10 or 12 SFM? No wonder it grinds to a halt, you might as well be trying to ram a chisel through a stationary bar....
  4. 14DP, 14.5* is the standard on early Colchester...

    14DP, 14.5* is the standard on early Colchester Student / Master and Bantam / Chipmaster, which were rebadged Clausing-Colchester for the north American market - you may find what you need that way...
  5. So make up a sacrificial plug that fits the minor...

    So make up a sacrificial plug that fits the minor diameter of the thread out of aluminium to prevent it collapsing....

    Dave H. (the other one)
  6. As long as the switch is break-before-make you'll...

    As long as the switch is break-before-make you'll have a disconnect between speed selections - this is probably a Good Idea.
    My Holbrook has a 3-speed motor (two from a Dahlander winding, one from a...
  7. Having no clue what you've bought either.... ...

    Having no clue what you've bought either....

    Can't go wrong with a rotary converter, size it with an idler motor about twice the mill's rated power and provide a couple of sockets so you can save...
  8. Hi, Makes no difference which is live and which...

    Hi,
    Makes no difference which is live and which is neutral, it's AC so the current reverses 50 times a second anyway...

    So, one of them to U1, the other to U2, move the links to get the motor...
  9. Not exactly what you're doing, but I set up...

    Not exactly what you're doing, but I set up near-constant-surface-speed by using a long-travel slider potentiometer coupled to the lathe cross-slide to control the VFD frequency, wiper goes tot he...
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    I find a tacho on the spindle more useful than a...

    I find a tacho on the spindle more useful than a frequency meter on the drive - they're pretty cheap form the gents in China and can be used with optical (slotted disc or reflective), magnetic or...
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    Thanks Peter, a very constructive suggestion -...

    Thanks Peter, a very constructive suggestion - I'll see whether there are enough of the right contacts to juggle, the contactors look fairly simple to dismantle and assemble (inside a large plastic...
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    If your Cazeneuve is really that noisy, we have a...

    If your Cazeneuve is really that noisy, we have a saying in Britain: "Sold a pig in a poke", they're good machines unless they've been neglected / buggered about with!

    So, what you propose is...
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    Thanks all, first a pic of the contactors in situ...

    Thanks all, first a pic of the contactors in situ - the sharp-eyed may even spot the welded contacts, the lower pair are forward on the left, reverse on the right with the overload (set at 10A)....
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    There may be, but if there is... after an evening...

    There may be, but if there is... after an evening of looking I can't find one - that's why I'm asking the questions!
    I'll try a local motor shop next week and see whether they'll divulge their...
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    Repairing contactors, welded contacts?

    I've discovered why my mill's motor comes straight on when power's connected, and why I can't stop the spindle motor or put the spindle into reverse... :(

    Contacts on the forward contactor are...
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    Open up the connection box on the motor, normally...

    Open up the connection box on the motor, normally on proper British/European motors you'll find six terminals attached to the windings, if there are three linked together it's in star (higher...
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    Good job! I move my lathe and mill (both 2000 kg...

    Good job!
    I move my lathe and mill (both 2000 kg or more) on scaffolding poles rolling on plywood, I'm impressed that your wheels held together!

    Dave H. (the other one)
  18. Easier to use o'clock - with the topslide dial...

    Easier to use o'clock - with the topslide dial pointing at your belly at 6 o'clock, swivel anti-clockwise so the dial is at 5 o'clock (or being precise, a minute past 5...)

    Dave H. (the other one)
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    inverting air-over-hydraulic jack?

    ok, it seems pretty simple to invert a regular hydraulic jack (rearrange the fluid pickup, external reservoir etc.).

    BUT with an air-over is it just an additional step of inverting the air...
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    Looks a bit like the Tarnow (Czech?) I was...

    Looks a bit like the Tarnow (Czech?) I was thinking about buying some years ago - the company's still going, making anti-aircraft guns etc.

    Dave H. (the other one0
  21. Or an older 415-in VFD with two banks of...

    Or an older 415-in VFD with two banks of reservoir capacitors ("bus" capacitors)can be hacked pretty easily by moving the neutral to between the two banks and feeding live to two of the input phases...
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    There's a fairly active Holbrook group on...

    There's a fairly active Holbrook group on Yahoogroups, if you haven't yet found it - a good source of info and encouragement!

    It has been useful for me and my Holbrook C13 :) Brother in law's...
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    Yup, standard European 6-terminal motor, as wired...

    Yup, standard European 6-terminal motor, as wired it's delta for 220-240v, for 415-480v link the three terminals that the incoming power isn't currently connected to - nice and simple :)

    Dave H....
  24. Yep. I was suggesting the travelling steady for...

    Yep. I was suggesting the travelling steady for roughing it down to overall diameter, not cutting the taper - 10" of half-inch rod is going to bend/climb the tool with anything like a roughing cut :(...
  25. Hence my suggestion of a toolpost grinder when...

    Hence my suggestion of a toolpost grinder when cutting the taper (after getting it uniform with a travelling steady first) - much lower forces involved, but going to take a week at a thou" or so per...
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