Failure of the camming system would cause a failure of the drive. There may also be small cams on the screw shaft or maybe that's what the pins do, force the expanders into the shoes. This locks up the whole assembly, and permits power transfer into the drive.
Judging from the diagram, the knob draws the screw shaft into the expanders and shoes, pressuring them out into the counterbore in the gear. Webb has you pretty well covered on this one. SBL recommended NOT using automotive oils because of theĭetergents in them (they keep the dirt in suspension). Out, you may want to buy a smaller amount from a vendor on You can get the oils in 1 gallon containers but just for starting The special grease was madeīy Roy Dean Products and it was a grease that contained The later South Bend Lathes used a special grease in
#South bend crossfeed t lock screw iso#
Stay in place on the lathe bed and is ISO 68. Vactra #2 and is a 'way' oil designed to stay 'tacky' and This was a SayboltĢ40 - 500 seconds 100☏.
Mobil DTE 25 is a goodĪnd everything else is SBL Oil type "C". This was a Saybolt 150 - 240 seconds 100☏ The gearbox and counter-shaft bearings use SBL Oil Velocite #10 oil is a light oil that is an ISO 22 and has been The old Saybolt system isn't usedĪnymore but this converts to an ISO 22 viscocity. The spec.s called for an oil with a Sayboltġ00 seconds 100☏.
There is nothing more contentious than lubrication specificationsįirst off, the headstock bearings and apron reservoir use
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