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1/1/2 allchin displacement lubricator rachet wheel

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john coleman 1	06/11/2014 17:31:54
2 forum posts	can any one help with a source of supply for this item or how to go about making this part
Neil Wyatt	06/11/2014 17:48:46
19226 forum posts 749 photos 86 articles	Ratchet wheels aren't hard to make. Unlike gears you don't need a special cutter as the profile is just a 90-degree triangle. You need to be able to index the ratchet blank (mount it on a shaft with a lathe change gear and improvide a detent if you don't have a rotary table). Use the sharp corner of an endmill, set so a line along one side of the mill goes through the centre point of the wheel to cut the teeth. If you mark the position of tooth 1, then index around to place 2, the correct depth of cut is such that it just erases the tooth 1 mark. I've made a small ratchet wheel (3/8" diameter) this way in silver steel, and another 1 1/2" diameter in steel, both with no problems. Neil
CotswoldsPhil	06/11/2014 19:16:20
196 forum posts 112 photos	I made the 30 tooth oil pump ratchet wheel (<>3/8 in dia. > for my Minnie in silver steel by planing the teeth with the blank held in the chuck on an ML7. I used a slotter attachment to rack the topslide. You could just rack the saddle if you are not over worried about wear on the saddle's rack and pinion. I indexed the spindle with a 30 tooth gearwheel attached to the rear of the spindle. On a Super 7 you could just use every other tooth on the 60 tooth bull-wheel. Phil

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