POTD was adapting a new oil can for the ball oilers on my Grizzly G0709 lathe. I made a screw on tip for the oil bottle that came with the lathe, but I overtightened the cap and broke it . . .
Bought a pump-style can from Tractor Supply. Plan was to make a stainless steel tip to fit over the stock tip. The tip end would have a “C” on the end which would push the ball down and seal to the brass insert holding the ball.
Started by chucking up a piece of ½” 304 stainless. Faced, center drilled and drilled a #50 hole. Then turned down to 3/8” (didn’t have 3/8” stainless on hand).
Turned a portion of the end down to 0.230”. The end surface kissed up against the brass detail around the ball and needs to be under the diameter of the brass insert. If the end is larger than the brass insert, and the insert is sub-flush to the surface around it, the tip wouldn’t seal against the brass insert.
Used a parting tool to cut the tip end down to 0.115”. The hole at the ball oiler is ~0.125”. Idea here is to make the tip so it will fit into the hole for the ball. Then cut a chamfer for a clean transition between the 0.230” diameter and the 0.375” diameter.
Used a parting tool to cut the 0.115” diameter area to a length of 0.020”. This is the depth the ball will be pushed. Put a dial indicator on the lathe bed with the probe against the carriage. Zero’d out with the tool against the base of the 0.115” area, then moved the carriage toward the tail stock until the indicator read 0.020”. Then parted off the nozzle.
Flipped the nozzle, faced, center drilled and drilled a hole the same size as the tip of the oil can nozzle. Turned the surface down a tad from 0.375” to 0.350”. I thought I might peen the back side of the nozzle over the oil can’s nozzle, a thinner wall thickness would make that easier to do.
The oil can nozzle is 5/16” diameter which happens to be the same diameter as a #4 center drill. Plunged a #4 center drill and test fit the oil can’s nozzle.
Mounted the nozzle in a collet and a square collet block and went to the mill. Removed half of the 0.115” tip so it was a “C”. Idea is the “C” will push the ball down and oil will flow through the removed half of the “C”.
Picture just below shows how it works. I didn’t peen the new nozzle over the existing one as it was a near press fit as is. It works pretty well, but I was getting some oil leaking because of not holding the tip flat on the brass ball oiler insert. So, time for an engineering change.
Chucked up the nozzle and turned a groove on the end for slipping an O-ring in place. The O-ring was a really good addition. It seals well enough that I see oil coming out of the opposite end of the oil galleys.
Thanks for looking,
Bruce
