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Logan Lathes
 
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Once a competitor in the South Bend, Delta and Sheldon market, the Logan lathe is still actively supported by the Logan Actuator Company, descendants of the original manufacturer, who offer a friendly and efficient service and have much data published on their web site; the section at http://www.lathe.com/models.htm being especially useful in checking the specification of a particular Logan model.
Logan lathes were available in 9", 10", 11", 12" and 14" versions (with a later 15" automatic turret lathe, the "Electri-matic", and a centre lathe the "Powermatic", being made as well). From 1940 until 1971 the company made, according to their records, some 90,000 lathes sold under the "Logan" and "Wards" names.
All Logan lathes were fitted with one double-row, pre-loaded  ball-bearing behind the spindle nose and a standard single -row bearing at the other end. The bearings were set with the correct loading at the factory,  and sealed "for life" with grease. Although the headstocks of the 9", 10" and 11" machines were of very similar appearance and design, the 11" model was fitted with a heavier, larger-bore spindle similar to its bigger brothers.
With a  collet capacity of 0.5" and a spindle bore of 25/32" the two smallest lathes in the range had capacities not dissimilar to their immediate competitors. The headstocks of the 12" and 14" lathes were able to accept collets with a maximum capacity of 1" - and had a useful 13/8" spindle bore; they were also much more massively constructed - a very necessary feature if the increase in centre height was to be justified by a genuine ability to handle heavier jobs and maintain a quicker rate of metal removal. 
Models made during the earliest years of production had an apron with a single quadrant control that both selected and engaged the power sliding and surfacing feeds - whilst later versions were considerable improved with the quadrant lever used to select the feed and a separate lever to engage and disengage it. The first countershafts were also different (and distinctive) being of "open" construction with each thin upright pierced midway to form a bearing housing. A further clue to the maker's position in the market comes from the screwcutting gearbox which, instead of enjoying oil-sump lubrication (and hence long-term reliability) needed the operator to squirt oil in from a can
Logan lathes were also commissioned by Montgomery Ward to be sold under their own brand name.

Logan 9" with screwcutting by changewheels and plain apron - circa 1954
The 9" Logan, although strongly built from honest materials,  was designed to be produced as economically as possible and, in 1954, cost (in basic form) just $249 - in the same year the Atlas/Craftsman 6" lathe was $145 and their 12" lathe  $260. The price is put in perspective by the next largest Logan lathe, the 10" which, with power cross feed as standard (but screwcutting with changewheels) was considerably more expensive at $410.

Logan 9" with screwcutting gearbox and power cross feed, but without an electric motor fitted - circa 1956

The 9" Logan lathe was available with a capacity of either 17" or 28" between centres and, by 1956 at least, could be ordered with various combinations of a screwcutting gearbox and power-feed apron. Like South Bend and Boxford, the range divided into simple groups:
Plain apron and changewheel screwcutting - Model 9B28-61
Powered apron and changewheels - Model 9B28-41
Plain apron and screwcutting gearbox - Model 9B9B28-21
Powered apron and screwcutting gearbox - Model 9B28-1
In the case of the 17" between centres lathes the model designations were identical - but with the figure 17 substituted for 28.
With a nose thread of 1.5" x 8 t.p.i., a bore of 25/32" and a collet capacity of 0.5" the No. 3 Morse taper spindle, ran on sealed-for-life ball races, the pre-loading of which was set at the factory. The makers claimed that the spindle run-out 12" away from the nose was as little as 0.001"; an adaptor was supplied to sleeve the spindle from a No. 3 Morse taper to a No. 2.
Of traditional American pattern the ground-finish bed had two raised Vs and two flats, the saddle ran on one V and one flat - the tailstock on the other V and flat. The bed could, at extra cost, be ordered flame-hardened.
Mounted independently of the lathe the simple, bronze-bearing countershaft was able to provide twelve speeds  of 55, 80, 112, 144, 200, 253, 353, 459, 645, 831, 1157 and 1450 rpm.  - although the very early 9-inch lathes may have had the backgear speeds set somewhat lower. The motor, fastened directly to the countershaft casting, was fitted with a two-step pulley - whilst the countershaft-to-spindle drive used a 3-step V pulley. The belt was tensioned by a traditional "over-centre" lever with a screwed adjuster.
Although Logan lathes are rare in Great Britain, in early 1999 a strange 9" lathe, with no maker's markings and looking like across between a South Bend and a Boxford was hauled out of a van in the author's driveway with the riposte, "Bet you don't know what this is, then!". As the owner didn't believe me when I suggested that it might be a Logan from the USA, I told him to check if the spare headstock bearings that lay in the bottom of the accompanying bits-and-pieces box were marked "New Departure", a name unheard of amongst amateur engineers in England. He almost fell over backwards when that, indeed, proved to be the case.


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Logan Lathes
 
9" Lathe   10" Lathe    11" Lathe    12" Lathe    14" Lathe    Headstock Spindle   
Drive Systems     Carriage & Bed     Accessories