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LORCH - Early Precision Bench Lathe
      Lorch Home Page    Newer Accessories Page 2    Newer Accessories Page 3   
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Toolmaker's Screwcutting  AVI-L   Precision Screwcutting  B27LZ   
Lorch dividing apparatus for watchmakers' lathes
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Earlier Lathes for Production Work      Short-bed Lathes   
LAS Precision Screwcutting
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Manufactured between 1880 and 1900 this lathe was intended to be used for work with larger clocks and instruments - exactly along the lines of American precision bench lathes such as those made by  Stark (the originators in 1862), the American Watch Tool Company, B.C. Ames, Wade, Pratt & Whitney, Rivett, Cataract, Hardinge, Elgin, Hjorth, Potter and Sloan & Chace.
Of 90mm (3.5-inch) centre height the lathe had a 24-inch long bevelled-edge bed, a No. 1 Morse taper tailstock spindle and several distinctive features: "90-degree" ways to the top slide; a rack-and-pinion lever-action tailstock assembly built as an integral part of the unit; 6 screws firmly holding the end plate on to the cross slide; the top-slide T slot sitting in a section raised above the top surface (in a manner similar to that used by Pratt & Whitney); a T-slot let into the back of the cross slide; flat handles to the slide-rest; hand-rest screw locks and rather small diameter headstock bearings with a spindle that lacks a mounting thread but with the capacity to accept 15mm Boley collets. In traditional fashion for this class of lathe the headstock spindle and bearings were, like those in a watchmaker's lathe, hardened, ground and lapped to as perfect finish as could be obtained.