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25th Nov 2020, 01:43 PM #16Most Valued Member
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If it was my job I would probably get a ford or holden diff and axles, make an adaptor plate to fit the crown wheel to the carrier hsg and use the splines off the car axles to put on to the fork axles.
Yup....i would do practically anything to get out of mucking around with those gears
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25th Nov 2020, 01:56 PM #17Gear expert in training
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The equations are here, starting about halfway down https://khkgears.net/new/gear_knowle...imensions.html
Basically, module = pitch diameter / number of teeth
More here https://khkgears.net/new/gear_knowle...thickness.html
Bevel math is hard, hopefully I'll get some experience with it at work eventually
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25th Nov 2020, 02:41 PM #18I break stuff...
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- Toorloo Arm, VIC
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What sort of size is the centre? Bit hard to tell from the shots in the forklift thread, but it looks fairly large...
Just musing that the LT230 centre diff is pretty compact, and the layout of it might lend itself well to being grafted in somehow. I have two old centres sitting here I can measure up for you, and/or donate to the cause if it might be viable?
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25th Nov 2020, 03:08 PM #19Senior Member
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- Nov 2010
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Just Visit Geoff Macnamarra in Moorabbin, he's got lots of gear. Jack McNamara - Differential Specialists
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25th Nov 2020, 09:21 PM #20Senior Member
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- Frankston south
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25th Nov 2020, 10:03 PM #21Most Valued Member
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Planetary gears for a forklift diff - can I realistically make some??
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25th Nov 2020, 10:19 PM #22Senior Member
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- Nov 2010
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- Frankston south
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Shed was on to it a couple of post's back, grab an EA centre, make the appropriate mods to mount the Drive gear, Heat treat the Axle ends and respline to suit the EA side gears
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25th Nov 2020, 11:09 PM #23Most Valued Member
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- Geelong, Australia
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Would you believe that the EB wagon that has sat in my front paddock for the last 18 months since I retired it - finally went to the scrappie the week before I got the forklift !!
Donor diff centers shouldn't be an issue though if I decided to go that way. I've got plenty of Landrover centers lying around, both standard Rover and Salisbury so I can definitely find enough bits for free to hack something together from.
Had a bit of feedback from the parts bloke today that sounds promising, but nothing confirmed as yet.
Steve
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25th Nov 2020, 11:24 PM #24Senior Member
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Yeah but you being a Landy nut an all........why on earth would you use that (expletive), unless you're talking Salisbury lol
Last edited by waxen; 25th Nov 2020 at 11:25 PM. Reason: Disappearing curse words
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25th Nov 2020, 11:38 PM #25Most Valued Member
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Would be a Salisbury donor - although I do have a rover ARB locker on the shelf. Maybe I should use that in case I get stuck on the grass
Steve
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26th Nov 2020, 05:32 PM #26Golden Member
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Just saw your thread Steve, I say have a shot at making them. Heck, you don't have enough projects anyway.
You've got a shaper to do the splines and a great mill to do the gears (don't recall if you have a dividing head?). I made a set of bevel gears a couple of years ago for a bicycle-powered pottery wheel. No load there- I made mine in aluminium but they are a similar size to what yours will be. The process is not as complicated as Ivan Laws' book makes it seem. They will not be a 'perfect' bevel but for diff side gears in a forklift a little noise will not matter a hoot.
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27th Nov 2020, 10:24 AM #27Senior Member
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shaping gears
The old goat is back.
https://www.youtube.com/watch?v=d6RmNSiTMwg
This is the link to the video on shaping bevel gears. Good setup.
Regards
BC
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27th Nov 2020, 11:00 AM #28Gear expert in training
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The biggest problem I see here is that as the tooth count decreases, the difference in tooth profile from inside to outside increases; on a 60 tooth gear, you're only spanning 6 degrees and can kinda ignore it if you wanted to, with 10 teeth you're spanning 36 degrees and things can get funky really quickly.
Cutting them on the shaper won't make the process any easier because you're still cutting parallel gaps between highly angled teeth, so you still need the tooth thinning correction on the inside.
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27th Nov 2020, 04:04 PM #29Golden Member
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I agree, the setup shown on the shaper has no advantage over doing the same on a mill with an involute cutter, it can even be done with a single-point tool in a fly-cutter-like arrangement. Somewhere there's a video of a bloke doing gears on a shaper that is set up with a cable arrangement to rotate the blank as the table moves past the cutter. I don't know if that would get you the necessary profile for bevels, he was doing spur gears.
The key to the process is that the cutter has to take two paths for each tooth gap (three if you rough it out first), with the blank rotated a certain amount and then stepped across so the cutter passes through the same cut at the inner (smaller) diameter of the gear but a different path at the other end. Easier demonstrated than explained.
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28th Nov 2020, 09:44 AM #30Diamond Member
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- Laidley, SE Qld
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