My new to me lathe, overpowered? - Page 2
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  1. #21
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    For now I got that 1/3 hp 1725 rpm motor switched over. What a difference! That other motor was just big and loud. I'm curious what my speeds are. Ill dig up a timing light. I can time a chuck like I would time a car engine pulley right? Lol

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    If your low speed is 60 to 80 on the plate you can put a piece of tape in one jaw and time it fairly closes just counting, then figure the rest of your speed are off/on by the same percentage.

    Oh man, you left the chuck key in the chuck, just wait till the guys notice that.

    *Nice looking lathe.

    You might have the local bender(furnace guy)bent you a chip tray.

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    Quote Originally Posted by Matt_50 View Post
    For now I got that 1/3 hp 1725 rpm motor switched over. What a difference! That other motor was just big and loud. I'm curious what my speeds are. Ill dig up a timing light. I can time a chuck like I would time a car engine pulley right? Lol
    Surely.

    Just remember to connect the timing light trigger lead to the FIRST spark plug on the Napier Sabre engine, not the 48th.

    Somewhere .. still in the blister pak - I have an El Cheapo that can read either of a magnetic button or an optical reflectance tape.

    I actually USE a vintage James Biddle mechanical, though. And "often".
    DC motors don't have "fixed" RPM. Brush timing matters, too.

    Easier to time your AC one - which DOES have known RPM - with a Stanley Powerlock II tape-measure o/e.

    Pulley size thing.

  4. #24
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    Before too long, I expect the inevitable question of how to wire a drum switch to the motor.
    BTW, nice-looking machine and bench, from a distance at least.

    Just saying.

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    Depending on how it feels for your height you might put perhaps 2 to 4" risers under the feet to make cleaning the bench easier.


    If you are new to lathe work a first practice project might be a T Tap wrench that has a hole from the but end going 2" in that slide on a straight rod held in your tail chuck.. A handy device. and you can also use it on the drill press.

    Shank can be 1/2 dia and the but-hole 1/4(drill)... (or any combination you choose.)

  7. #26
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    Tex is right the 3450 is the problem.You could put a 5 HP 1800/4 pole motor on that machine and not hurt it, but the 3600/2pole motor will run the machine faster than the manufacturer recommends. Its as simple as that.

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    O dear, does all this micro motor loving mean I have 2 much HP on my 13" Holbrook? I have 5HP with a VFD. You guys crack me up, you could put 25HP on that little toy and not hurt it. It has a tiny flat belt drive. If you have a case of temporary stupidity or just run short on talent and crash it the belt will slip and nothing will happen.

  9. #28
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    Quote Originally Posted by mcload View Post
    [SIZE=3]Before too long, I expect the inevitable question of how to wire a drum switch to the motor.
    Phht.. no class.

    How about a bass fiddle? Or an Alto Sax?

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    Quote Originally Posted by moonlight machine View Post
    O dear, does all this micro motor loving mean I have 2 much HP on my 13" Holbrook? I have 5HP with a VFD. You guys crack me up, you could put 25HP on that little toy and not hurt it. It has a tiny flat belt drive. If you have a case of temporary stupidity or just run short on talent and crash it the belt will slip and nothing will happen.
    Why would the belt slip? Mine stops everything dead, and you can see the tool post flex by probably 200 thou. That is with the stock 1/2 HP motor and a serpentine automotive belt.

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    You must have the special order rubber tool post.

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    Quote Originally Posted by moonlight machine View Post
    You must have the special order rubber tool post.
    Rocker tool post, high speed steel. One a these days pavt is gonna try out them new-fangled brazed carbide thingies

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    Quote Originally Posted by EmanuelGoldstein View Post
    Rocker tool post, high speed steel. One a these days pavt is gonna try out them new-fangled brazed carbide thingies
    Nope, sorry. AXA post with a (usually) CCGT holder in it. The entire machine flexes that much if you stall it dead in back gears because that's around 80-90 ft-lbs. Said torque being due to the speed reduction and gear reduction.....

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    Quote Originally Posted by moonlight machine View Post
    You must have the special order rubber tool post.
    Actually nope, its a regular AXA post with carbide. Stalling the entire machine while in back gears is good for 80-90 ft-lbs all of a sudden, things move.

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    Quote Originally Posted by thermite View Post
    Phht.. no class.
    How about a bass fiddle? Or an Alto Sax?
    Yes, I now regret writing that ill-conceived post. I meant that as being tongue-in-cheek at the time. My apologies to Matt_50 as I meant no disrespect.
    I will strive to always write perfect, politically correct posts like you and everyone else on this forum. Thanks for pointing out my mistake, thermite.

    PMc

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  17. #35
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    Quote Originally Posted by mcload View Post
    Yes, I now regret writing that ill-conceived post. I meant that as being tongue-in-cheek at the time. My apologies to Matt_50 as I meant no disrespect.
    I will strive to always write perfect, politically correct posts like you and everyone else on this forum. Thanks for pointing out my mistake, thermite.

    PMc
    So you wont be posting in that covid thread?

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    Quote Originally Posted by Rob F. View Post
    So you wont be posting in that covid thread?
    What does that mean? I have no idea what you are talking about.
    What covid thread?
    Last edited by mcload; 08-11-2021 at 08:19 PM.

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    Quote Originally Posted by mcload View Post
    Yes, I now regret writing that ill-conceived post. I meant that as being tongue-in-cheek at the time. My apologies to Matt_50 as I meant no disrespect.
    I will strive to always write perfect, politically correct posts like you and everyone else on this forum. Thanks for pointing out my mistake, thermite.

    PMc
    What mistake? I just thot there was too many folks wiring switches to drums and ignoring all the other musical instruments.

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    Quote Originally Posted by mcload View Post
    What does that mean? I have no idea what you are talking about.
    What covid thread?
    PM keeps a sort of independent in-house insane asylum for overflow when we get crazier than usual.

    ISTR it is currently contracted-out to a 200 year-old retread Limey Bolshevik who has downsized from Craven Brothers lathe-herder to a fully-licensed wheelbarrow operator or some such in his dotage?

    You don't really want to go there any more often than to poke it with a stick or toss in a smoke-grenade every now and again ... then scarper-off.

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    Quote Originally Posted by mcload View Post
    What does that mean? I have no idea what you are talking about.
    What covid thread?
    The Southern sections of PM are generally more civilized, South Bend, Antique etc.

    If you ever dipped a toe into the General section, it might be a wake up call. This could be potentialy surpassed by some threads in Manufacturing. The Covid thread is 237 pages of pleasantries

    100,000 UK Covid 19 Deaths

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    Quote Originally Posted by texasgunsmith View Post
    The Southern sections of PM are generally more civilized, South Bend, Antique etc.

    If you ever dipped a toe into the General section, it might be a wake up call. This could be potentialy surpassed by some threads in Manufacturing. The Covid thread is 237 pages of ^^^ piss-ant sleaze ^^^
    There. Fixed that for you.

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