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Home Machine Tool Archive Lathes for Sale E-MAIL Tony@lathes.co.uk
South Bend Lathes 8-inch & 9-inch & Model R Pre-1920 1920-30 8" & 9" Light Ten Heavy 10" Clones The Factory South Bend Home Page 9-inch "Workshop" Accessories Silent Chain Drive The 9-Inch "Workshop Precision" Lathe is covered in detail HERE 9-inch Junior Photographic Essay
It is almost certain that the 8-inch "Junior" (a low-cost model introduced to cope with the terrible trading conditions during the depression), was the first South Bend lathe to use a remarkably effective system of economical manufacture where the headstock spindle was hardened and subjected to a "super-finishing" technique that allowed it to run directly in the cast iron of the headstock. Given just a modicum of lubrication this arrangement (also used on many of the later and even more popular 9-inch Workshop models) appear to give the bearings an almost unlimited life. The author has stripped down lathes where years of neglect and abuse had reduced the bed and slideways to scrap, but he has yet to find one where the spindle and bearings were worn to anything like the same extent. Interestingly, not all models were so equipped for examples of the 8-inch lathe have been found with "babbit" (white-metal ) bearings and in some years the 9-inch was offered in a basic 6-speed form with an unhardened spindle and a top speed of around 630 rpm (whilst the hardened-spindle version had 12 speeds reaching as high as 1250 rpm) and also with bronze bushes - though the latter have only been discovered when lathes have been stripped down and were not mentioned in contemporary catalogs.
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The first small South Bend lathe entered the catalogues in the early 1920s as the 9" Junior New Model (above). This was, in effect, a 10" lathe with reduced centre height and had almost nothing in common with the much more famous and popular 9" model introduced in 1934 and called by South Bend the "Workshop" model (illustrated below). Whilst parts from the original 10" lathe (the screwcutting gearbox and power-feed apron for example) can, with a little fiddling, be made to fit the Junior models, bits from the later 9" "Workshop" lathes cannot be used. As an example of the design changes between the two an examination of the tumble-reverse mechanism would show that the 9" Junior, like its larger cousins, featured a spring-loaded, solid-bronze lever and brass-covered handle with positive indent location - whilst the later 9" lathe had a much simpler plain, cast lever, clamped in place with a bolt. Even though it was an inexpensive model the 9" Junior followed South Bend's original practice of using phosphor-bronze bushes, lined bored, lapped and adjustable for wear.
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8" Junior New Model South Bend 1932 model (above) This was the baby of the range and only offered for sale during 1931, 1932 and 1933 - although it is possible that some unsold stock might have lingered on into 1934. Everything was done to both produce the lathe as economically as possible and distance it in desirability from its very much more expensive brothers. Although both the spindle bore (at 3/4") and collet capacity were the same as the 9" version, the spindle ran in the cast-iron of the headstock, the nose was reduced in size from 11/2" to 13/8" and given a 10 rather than an 8 tpi thread. Both the headstock spindle and tailstock centres were taken down from the usual No. 2 to a rather miserable No. 1 Morse taper, the drive belt was narrowed by 1/4" to a 1-inch width and the compound slide assembly was more lightly constructed with a smaller capacity toolpost. At around this time the beautiful but expensive and time-consuming black "Japanning" finish was dropped and the lathes finished in ordinary oil resistant paint of a dark grey slightly tinted with blue. The 8" Junior was listed with various between-centres capacities from as little as 61/2" to 301/2". A wide variety of stands and countershaft-drive systems was offered for both the 8" and 9" Junior, from simple rear-mounted 3-speed units to complex under-drive systems built into solidly-constructed stands. One option exclusive to the 8-inch (and only offered in the dedicated advertising sheets) was to have a single, plain slide instead of the compound unit - and if this was chosen then, in 1932, the cheapest 8" lathe could be whittled down to just $98, and the cheapest 9" $160 - a considerable saving in a time of economic depression and widespread unemployment.
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South Bend "Model 5" - the first 9-inch lathe to carry the "Workshop" label was introduced during late 1933 or very early 1934 and was radically different to Junior Model illustrated at the top of the page. The bed, being some 50% narrower, was entirely different as were all the main castings and accessories - the two lathes may have looked similar but were, in reality, separate models with nothing in common. A separate section is devoted to the 9-inch Workshop lathe and its development during the 1930s.
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9" South Bend Bench Model 15 "Workshop" 1935. This next development of the type, with many of the initial inadequacies addressed, now took on the look of what, for many, remains the definitive small South Bend lathe.
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1937 South Bend 9" Model R The introduction of the 9" "Workshop" did not mean the demise of the original, heavier 9" lathe which continued in production for some time as the Model R. This was also the basis for the later 10" lathe, which looked identical but, judging by the numbers still in use, must have been much more popular - one significant improvement being the increase in spindle bore from 3/4" to a much more useful (and remarkable for so compact a machine) 13/8 ". A simplified version of the R was also listed as the "Junior" model. This was mechanically identical but lacked the option of either a screwcutting gearbox or power sliding and surfacing. All Model R lathes were available for either bench or stand mounting. A version of the early 9-inch, and possibly the Model R, was sold in Great Britain as the "UNITOL". These had all South Bend identification marks removed, even to chiselling off any letters cast into the bed.
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Typical South Bend countershaft assembly. The electric-motor shaft carried a V pulley with the V belt driving a large-diameter, narrow, flat pulley. This rather unusual arrangement (of a V belt on a flat pulley) worked very well even if, to modern eyes at least, it appears illogical. The final drive to the headstock was either by a 3-step flat belt or, less commonly, a V-belt. The countershaft was arranged to hinge about its base and an over-centre tensioning device was fitted - the long slotted adjuster for which can be seen above the motor between the upper and lower belt run.
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