MetalworkingFun Forum

Thanks Willie, actually like my sleep, everyone around here knows not to even think about showing up before 10 or 11, I don't do mornings.

Problem of the day. Picked up two slow speed hydraulic motors on clearance, regular $260 for yes $65. Had a gear reducer off a small conveyor, it originally had a hydraulic motor coupled to it, but I stole it years ago for a power feed on a wood chipper. Had planned to mount one of the motors on the gear box, BUT the old motor must have been 5/8 shaft the new one is 1 inch. The input to the box is a keyed female hole with a flange mount for the motor. I can make an adaptor, 5/8 male with a keyway to 1 inch bore to fit the motor but how would I best cut a keyway in the blind hole?

broach homemadetools.net just had a thing on making a broach for cutting keyways and stuff.

Thanks
Might try broaching it on the lathe or the mill.

Greg, can you drill a hole at the inner end of the req'd keyway? It'll make broaching in the lathe (or your shaper) a lot easier.
Just a thought.

Steve

I was thinking the same thing Steve. Without the hole would the chips break? Think your strokes would keep getting shorter and shorter, Hum that sounds familiar.

Why can't you broach it thru?

"Billy G"

I need an adaptor Bill with 1 inch bore female on one end and 5/8 male on the other. Thought about making it in two pieces so I could broach it through, would make it quite a bit longer which would make the plate that bolts the motor to the gearbox thicker. Still an option.

Ahh -- I see the dilemma now. Thanks for the clarification.

"Billy G"

Sounds like you need access to a shaper.

Or, you could make the 5/8" keyway the same as the 1" hole and custom make an "L" shaped key which is 1/4" on one side and 7/8" the other side, and it fits both shafts.

Dug through my stock, (junk shed) and found a more suitable reducer that had a male shaft on the input. Another problem arose, the original was vented on the top but I need to hang it upside down, so rather than change the vent we have rev 43.a. Used double roller chain to couple the motor to the reducer. This box must have been made for a particular application, where the output had to be aligned. It was bolted in two places with two opposing set screws to tilt it. They were machined away to allow for 4 bolts.





Doesn't look like 3 days work.
Some engineers need to be slapped. The 4 bolt holes around the output shaft weren't concentric. The side ones were equal distant from the shaft but the top and bottom were at totally obscure dimensions.