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Tail stocks

Discussion in 'GENERAL DISCUSSIONS' started by Pmma-Granville, Jan 11, 2017.

  1. Pmma-Granville

    Pmma-Granville United Kingdom Steel Registered Member

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    Don't know if this is the right section so feel free to tell me off!
    Just a bit of a laugh really, the small grey tailstock is off my little Granville lathe, the tailstock behind it is off a Colchester mascot. Not a massive lathe but the size difference is still quite funny!

    IMG_0660.JPG
     
    doogledee, Chipper5783, rdean and 5 others like this.
  2. Bill Gruby

    Bill Gruby United States Global Moderator Staff Member H-M Supporter-Premium

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    The size of the tailstock will give the buyer some insight into the quality of the lathe. Not so much as how large it is but how rigid it is for the size. More rigidity, less vibration.

    "Billy G"
     
  3. Pmma-Granville

    Pmma-Granville United Kingdom Steel Registered Member

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    No vibration to speak of on the Colchester. A lovely machine but most of the accessories weigh more than me so can be a difficult to set up sometimes!
     
  4. British Steel

    British Steel United Kingdom Active User Active Member

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    I get the same problem, Granville, my Holbrook's tailstock weighs about the same as a 7x12...

    Dave H. (the other one)
     
  5. Pmma-Granville

    Pmma-Granville United Kingdom Steel Registered Member

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    Hello Dave! Good to see another Union Jack (or flag, however you want to say it)!
    What model Holbrook do you use? Lovely machines!
     
  6. British Steel

    British Steel United Kingdom Active User Active Member

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    Model C number 13 (so roughly 13x28 in Merkin parlance), bit of a labour of love rolling-rebuild! VFD to get 415 from 240 (hacked, not hideously overpriced Drives Direct or whatever, it seems to be the same mod' though and cost me 50p to do) with a home-brew control box full of tacho', motor current meter, switches, relays and pot's to do Clever Things like near-constant surface speed (slider pot on the cross-slide) and jogging, overspeed to get 2500 RPM for short periods or underspeed to get 2.2 RPM (cogs a bit), still hunting for the accessory change-gears for DP and Module threads, pair of steadies (will have to make 'em I think, rarer than hen's teeth / rocking-horse droppings / honest politicians). Purists will probably complain about the paintjob, bright red (doesn't show the blood) with a white bathtub featuring St George's cross...

    I have an adaptor to put the topslide on an angle plate (then bolt a small tilting machine vice to it) to do light milling, gives 10.5" of X travel (with power feeds, of course...), 5.5" of Y (manual, sadly :( ) and ooh... 28" of Z with power feeds :rolleyes: It's rotatable too, should I want the Y axis at other than 90* to the X, and big enough to bolt a 6" rotary table on...

    I have Further Modifications planned, the Model C didn't come with the single-tooth clutch LH/RH and trips in the feed/threads drive like the B's, T's and H's, there's room for it in the QCGB and under-spindle geartrain though, the hard bit will be making it work on the coarse thread setting (will need something like the machine-gun synchronisers WW1 biplanes had, perhaps from a cam attached to the rear of the spindle, to make it work - in progress!).

    Dave H. (the other one)
     

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