None that I have ever come across.? Definitely none that said anything about using the one screw in each clamp(that seems to be as good a term as any) to adjust the running clearance.? One should I think keep in mind that the headstock is made of cast iron, not steel.? Many steel alloys will cold bend at least a little.? Cast iron will break before it bends much.
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The 101.07301 went out of production in 1957.? The various factory Technical Bulletins with some more details on the care and feeding mostly seem to be dated later than that.? And although some apply to the Atlas 10¡± which went out of production at about the same time, I¡¯ve never seen any specifically on the 101.07301.? Which is unfortunate.
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On the subject of drilling holes in the Oilite bushings, if you are going to do that, you will obviously increase the oil flow rate and to my way of thinking, may as well use the usually cheaper brass bushings.
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The only reasons that I could think of to explain faster emptying of the left cup than the right one on a 101.07301 is that the bushing is thinner or the inner surface of the right one has plugged up from wear.
The bearings as Robert points out do not have shims nor is there a "cap" there is however more what could be described as a clamp (see photo, chuck side is the same). This clamp (please correct me if you know the proper name) can be tightened but with great caution as the clamps can brake/crack. Tightening will remove some of the slop in the spindle, I would not use more than a firm hand on a screw driver to be safe. Also see a photo of the replacement bearings with no "holes".
Robert, is there any known specifications for tightening the bearing clamps, inch pounds, number of turns... or ?
