I have found some damaged teeth on the rack and pinion gears on the main spindle on the Jones & Shipman drill that I am in the process of disassembling. Trying to identify the size,mod or DP of the teeth. I have a full sized sheet that Hurcus Australia put out for 20 degree pressure angles. Does any one have a similar sheet for 14.5 degree pressure angle teeth, or could point me in the right direction to obtain one. I took a cast from one of the good teeth on the rack in polyester and it looks close to a 20 degree gear, as the drill is 80 odd years old I was expecting the gears to be 14.5 degree ones.
Bob
Bob
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