I am attempting to make large dial conversion for a South Bend 14 1/2 lathe for a friend of mine. I took measurements from his original setup but changed dimensions to a 3 inch diameter dial. These parts were made on my 9 inch S B lathe.
This was my third attempt at cutting this gear. I learned a lot on the first two tries. Third time was a charm.
We didn't want to alter the original parts so I had to make a new gear and shaft as the shaft had to be extended several inches.
This is the new bushing with dial face. It is 6" long and I bored and reamed a .750" hole through it. It will get a bronze bushing in each end to support the.625" diameter shaft.
This is what the parts look like assembled. I will make the acme screw , the graduated dial, and put needle thrust bearings in each end.
This unit will be for the cross slide.
Cutting the gear on my Burke mill. It took hours to cut the gear. The first round was .100" depth of cut. Second round was .054" depth of cut, then a .001" finish cut. The spindle speed was 154 RPM, the feed was about 1" per minute.
This is the gear cutting setup using the new arbor I made.
.......More to come.
This was my third attempt at cutting this gear. I learned a lot on the first two tries. Third time was a charm.
We didn't want to alter the original parts so I had to make a new gear and shaft as the shaft had to be extended several inches.
This is the new bushing with dial face. It is 6" long and I bored and reamed a .750" hole through it. It will get a bronze bushing in each end to support the.625" diameter shaft.
This is what the parts look like assembled. I will make the acme screw , the graduated dial, and put needle thrust bearings in each end.
This unit will be for the cross slide.
Cutting the gear on my Burke mill. It took hours to cut the gear. The first round was .100" depth of cut. Second round was .054" depth of cut, then a .001" finish cut. The spindle speed was 154 RPM, the feed was about 1" per minute.
This is the gear cutting setup using the new arbor I made.
.......More to come.