I'm trying to match a hub to a motor shaft, ideally by using something that exists so I further machine it. Other than the 14mm shaft bore & 5mm keyway slot, the remaining dimensions are just approximate. Really the only thing I'm not set up for is the keyway slotting. Maybe I'm not using the right term. I see al kinds of couplings but nothing like this. Any ideas?
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Motor hub?
- Thread starter PeterT
- Start date
140mower
Don
I think that you might find something at princess auto designed to have a sprocket welded to it.
The keyway can be put in with the lathe by running the carriage back and forth while feeding in the cross slide a thou or two with each pass. They can also be put in on the mill by using the quill as a slotting attachment and in feeding again very slowly with the table. I wouldn't want a steady diet of either method, but I have used both with great success.
The keyway can be put in with the lathe by running the carriage back and forth while feeding in the cross slide a thou or two with each pass. They can also be put in on the mill by using the quill as a slotting attachment and in feeding again very slowly with the table. I wouldn't want a steady diet of either method, but I have used both with great success.
As others have suggested, you can broach with a lathe, or a mill, or a shaper. But surely you know someone in Calgary who has a broach set.
If not, a single broach and collar might be easier on your patience and sanity than trying to find the right pre-made part or making it in some awkward way. Broaches for this purpose work and work well.
John Conroy
member
I've got the 5mm HSS tool bit I made still mounted in a 5/8" boring bar if you want to make your keyway the slow way Peter.
Post in thread 'King 1440 and Craftex Threading' https://canadianhobbymetalworkers.com/threads/king-1440-and-craftex-threading.7096/post-106388
Post in thread 'King 1440 and Craftex Threading' https://canadianhobbymetalworkers.com/threads/king-1440-and-craftex-threading.7096/post-106388
John Conroy
member
Just realized you'll be working in a 14mm bore so that won't work for you.
This photo is of the home made guide with a diameter of about 13.97mm and the broach is the 4mm one. I also have the 5mm broach. The guides are pretty easy to make. Turn it on a lathe. Cut a slot with an end mill with the part held in a 5C collet holder. Then part it off and chamfer the edges even with just a file. I use my 3T arbor press but mostly aluminum pulleys.
I don't remember what I paid for the broaches but even at the time I thought they were a good investment.
I don't remember what I paid for the broaches but even at the time I thought they were a good investment.
BaitMaster
Ultra Member
I did this project as well, but my shaft was 11mm. Keyway was 4mm.
I bought the broach and shim for like 40$ off of Amazon?
I made the guide out of a piece of scrap oilfield sucker rod. Cut the slot with a 1/4” end mill in a collet block. Turned down on my lathe.
Used my 20t hydraulic press to broach. Very very carefully.
I think if you get the broach @PeterT the rest should be easy enough. They are cheap on Amazon for a one off.
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One can even print guides. I wouldn't use it for steel or iron pulleys but worked well enough for 19mm ID aluminum.
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Yup. And then then there is also that blue thing in the background also missing in my shop Haha. I know guys where a press is like the #3 tool they buy, maybe because more machinery focused hobby, pressing bearings & gears on & off or whatever. Thus far I've dodged the bullet. I'm no expert but until less expensive offshore broaches & presses came along, broaching was kind of an expensive operation. But it does deliver clean, consistent results. I've seen all kinds of alternative shop made methods & accessories. Some are simple & just take more time, others are more sophisticated including powered. I figured for the odd model gear I'll have to do, or softer material hubs like this example, I could go that route when the time comes. Looks like that time is arriving on a few fronts. Many ways to skin the cat I suppose. But it would be desirable to keep the operation off the lathe & mill for repeated or especially heavier jobs.
BaitMaster
Ultra Member
130$ for a 12t……
The press definitely comes in handy.
So many things you can do with one. Get a brake, make different adaptors, cutters, etc. use hex keys as broaches to make Allen key bolts…..
Use it for clamping, holding….. straighten long bars, or bend them……
All of this without wearing out the precious lathe and mill.
LenVW
Process Machinery Designer
FWI . . .Check these guys out
Martin
Martin Sprocket & Gear manufactures Power Transmission, Material Handling Solutions, and Hand Tools. Offering vast inventories & local field support.www.martinsprocket.com
Martin Sprocket has a Warehouse / Engineering site at near Kitchener.
Cambridge, Ontario
320 Darrell Drive RR1Ayr, ON N0B 1E0
Phone 519-621-0546
After Hours Phone
Fax 519-621-4413
I saw the finished product in person. Skookum work.
I have this exact press, I think i got mine 15 or more years ago. I use it mostly for bearings. But I have used it for other things. Very handy.
As for the keyway. I have used both my mill and my lathe to make keyways and both are doable but so painful. If you have the money buy the set of broaches from accusize and use the forum discount, every dollar counts. You won't be sorry. The broaches will do the job in like 20 minutes.
On my lathe I tried the ytube method of using a cut off in the tool holder and moved it pack and forth to cut out the key way. It took a lot of work to do it. On my mill again on the ytube idea I tried to mill the slot and then file it. Both did work but again took a lot of time and effort. These two times I did this took entire afternoons.
Doggggboy
Ultra Member
Say what now?
I've seen the trick of pressing them into a red hot shaft with a hole in it.
Is that it?