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19th Jun 2022, 06:47 PM #1Diamond Member
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Can you buy splines sockets and shafts off the shelf?
Hi all,
Just wondering if it is possible to buy splined shafts and sockets off the shelf or are they usually custom made?
If you can, where would be the best place to source them from.
I am after a socket to suit a 38 splined shaft that is 20mm in diameter. Here is the photo of the splined section.
Thanks
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19th Jun 2022, 07:38 PM #2Diamond Member
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There is a limited selection available, i have bought bushes to suit splined drives on hydraulic pumps before, I got them from our hydraulics supplier, but i think a bearing/power transmission supplier might be a better bet.
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20th Jun 2022, 06:46 PM #3
Spend some time and search this companies' catalogues - or call them: https://www.smallparts.com.au/store
Cheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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20th Jun 2022, 08:20 PM #4Gear expert in training
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The common industrial/agricultural spline standards are often available off the shelf, but they're much larger than that.
What's it off? 38T with 20mm OD could be 0.5 Module but we'd need more numbers to confirm it.Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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20th Jun 2022, 10:29 PM #5Diamond Member
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20th Jun 2022, 10:53 PM #6Gear expert in training
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The part number, because I reckon that's going to be the cheapest solution for a Hafco. Not trying to be a smartass, it's just that having stuff like that made is not going to be cheap.
Maybe this will work? Even if you have to replace the whole thing and not just the handle https://www.machineryhouse.com.au/3DA8800 Have you tried contacting Hafco?
You could even just pull it apart and machine the splined end down to suit an off the shelf crank handle because those are dirt cheap https://www.machineryhouse.com.au/DW009Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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21st Jun 2022, 04:27 PM #7Diamond Member
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I already have the original handle for it, I was planning to motorised it, so was hoping to find something that fits it off the shelf with the correct spline that I could easily attach to a motor.
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21st Jun 2022, 07:00 PM #8Gear expert in training
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Ah now I get it. Bare minimum I'd need OD, root diameter and an accurate measurement over pins. A couple of small drill bits would do, I'd have to check the standard for the size but I imagine it would be around 1.2mm
Can it be cut through, or does it need to be closed on one end? Cut through I might be able to sneak through the wire EDM, blind would have to be shaped and I'll have to go through the proper channels.Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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21st Jun 2022, 07:23 PM #9Diamond Member
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It can be cut through, that wouldn't be an issue.
I'll see if I can get some more accurate measurments. If I can't get something that will work off the shelf I probably wouldn't bother.
Maybe I can attempt to broach it manually on a mill with a rotary table, it would be a slow process but for a one off probably wouldn't be that big a deal.
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21st Jun 2022, 08:59 PM #10Gear expert in training
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Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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24th Jun 2022, 09:56 PM #11Most Valued Member
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Borgeson Universals in the USA might have something.
In my previous life I bought a few bits from them (around 2007-8) and they were excellent to deal with.
One of the things I bought was a steering uni. It had to have a spline in one and the other end to be a plain bore with the outside unmachined so I could machine it myself to take a cotter pin.
They didn't have that combination as a stock item but not a problem, they just pulled one end of a uni from the line before it was machined down.
The price was really reasonable too at the time.
peter
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25th Jun 2022, 10:43 PM #12Mechanical Butcher
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Unless originality is important, a scotch key is cheap and effective.
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26th Jun 2022, 12:40 PM #13Diamond Member
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I would have to change the shaft if I wanted to use a keyway type setup, I don't really want to pull the shaft out, I think it would be a lot of work.
I thought of a clamping collar type arrangement as well, seeing that there is very little load on it, it would probably work fine.
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26th Jun 2022, 08:46 PM #14Mechanical Butcher
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Not necessary to dismantle anything if the material can be drilled.
An axial hole is made at the junction of the shaft and handle, so half of an inserted pin engages with each.
It's called a round key in this illustration:
https://res.cloudinary.com/engtips/i...s/image002.jpg
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