| Headstocks with Phosphor Bronze Bearings | |
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Shown is a back-geared headstock, which used bronze box bearings.
It also had an improved wrenchless bull gear lock to engage or disengage the back
gears without using a wrench. The four-step cone pulley has eight spindle speed changes: four direct drive and four back-geared, is used for the 13", and larger lathes. A 3-step cone pulley is used on the 9" and 11" lathes for six spindle speeds, three direct drive, and three back geared. |
| Spindle and Bearings | |
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| The spindle bearings are phosphor bronze, and adjustable for wear. They are lubricated with a felt pad oiling system. | |
Cross section of an earlier model headstock with front (J), and rear (F) phosphor bronze box bearings. |
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| The headstock spindle is made of a special quality spindle steel which is heat-treated, hardened and ground. The spindle is hollow so that bars and tubes may be passed through the lathe headstock for machining. The tapered hole in the spindle and all bearing surfaces are accurately ground. Spindle has a hardened and ground thrust bearing and an adjustable take-up nut to eliminate end play. | |
| These type of bearings were eventually replaced with integral cast iron spindle bearings. |
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