What sort of bearing do i need for this?
08-29-06, 03:22 AM
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What sort of bearing do i need for this?
As a winter project i'm going to have a go at making a load bike that's something like one of these:
https://www.workcycles.com/workbike/u...axlepivot.html
I think i understand how these things work, and my mechanics and welding is not too bad, but i've got no idea about bearings. Also i don't have access to a lathe to machine bearing housings. Does anyone have any ideas about what sort of bearings i'd need for the axle pivot? Could i use one meant for a car maybe? Where would you start looking? Thanks.
https://www.workcycles.com/workbike/u...axlepivot.html
I think i understand how these things work, and my mechanics and welding is not too bad, but i've got no idea about bearings. Also i don't have access to a lathe to machine bearing housings. Does anyone have any ideas about what sort of bearings i'd need for the axle pivot? Could i use one meant for a car maybe? Where would you start looking? Thanks.
08-29-06, 09:19 AM
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Look at thrust bearings in www.mcmaster.com Probably a heavy bronze bushing at top and bottom riding on heavy steel washers and a thrust bearing in between would handle the weight. Such bearings are $2 or less per part: bushing + two washers + thrust bearing, doubled, one set at top and bottom for about $10-12 Thrust bearings will handle several hundred #. Look on pages 1045 and 1059 and use washers at least 2.75mm thick. Type thrust bearing into the search box.
08-29-06, 01:07 PM
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Originally Posted by sch
Look at thrust bearings in www.mcmaster.com Probably a heavy bronze bushing at top and bottom riding on heavy steel washers and a thrust bearing in between would handle the weight. Such bearings are $2 or less per part: bushing + two washers + thrust bearing, doubled, one set at top and bottom for about $10-12 Thrust bearings will handle several hundred #. Look on pages 1045 and 1059 and use washers at least 2.75mm thick. Type thrust bearing into the search box.
08-30-06, 10:05 AM
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That would be an oil impregnated sleeve bearing.
That bike in the picture probably doesn’t have a bearing at the axel pivot.
Just a sleeve welded to the axel and a greased pin attached to the frame, with a brass thrust washer taking the load of the sleeve. Like a gate hinge.
If you wanted to get fancy you could use a front spindle and bearing from a rwd car.
That bike in the picture probably doesn’t have a bearing at the axel pivot.
Just a sleeve welded to the axel and a greased pin attached to the frame, with a brass thrust washer taking the load of the sleeve. Like a gate hinge.
If you wanted to get fancy you could use a front spindle and bearing from a rwd car.
08-30-06, 05:38 PM
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a motorcycle head bearing should work very well in that application, if you read through the other pages, it states that christiania uses bicycle headstock bearings there for a 150kg load, not bad capacity.
Roller headstock bearings can be picked up for roughly $40 at honda, just converted my 750 to tapered rollers from ball and race style, and that's what I paid.
For super duty capacity, look into a spindle and bearing assembly from a bronco/ranger front axle, there's a pic of the spindle here:
https://www.therangerstation.com/tech...ont_Axles.html
About halfway down the page are a couple photos of spindles, they look ready to bolt up, if you also get a brake disk, or drum you'll just need to figure out how to mount everything. They're made to hold a couple thousand pounds easily, but may be heavy, do some digging and look into FWD rear axles, small boat trailer type axle spindles etc, my little boat trailer holds 1200lbs, and complete with boat can be easily picked up and carried by a couple people.
I've used automotive spindles on a few projects, a merry go round for the kids, and a rotory table for some things at work, and a few other deals where I needed strength and easy motion combined
I figure they have liability and warrenties to worry about, so they've done all the homework on what's going to last and what won't so I don't need to reinvent it.
also, on a side note, the spindles may work well when supported only on one side, (I've never supported any spindle utilizing constructions from both sides, but wasn't overly concerned about weight issues) but that would require a much stiffer, possibly lot's heavier 'floor' , so it may be lighter if you dupe the support structure they show there.
Ken.
Roller headstock bearings can be picked up for roughly $40 at honda, just converted my 750 to tapered rollers from ball and race style, and that's what I paid.
For super duty capacity, look into a spindle and bearing assembly from a bronco/ranger front axle, there's a pic of the spindle here:
https://www.therangerstation.com/tech...ont_Axles.html
About halfway down the page are a couple photos of spindles, they look ready to bolt up, if you also get a brake disk, or drum you'll just need to figure out how to mount everything. They're made to hold a couple thousand pounds easily, but may be heavy, do some digging and look into FWD rear axles, small boat trailer type axle spindles etc, my little boat trailer holds 1200lbs, and complete with boat can be easily picked up and carried by a couple people.
I've used automotive spindles on a few projects, a merry go round for the kids, and a rotory table for some things at work, and a few other deals where I needed strength and easy motion combined
I figure they have liability and warrenties to worry about, so they've done all the homework on what's going to last and what won't so I don't need to reinvent it.
also, on a side note, the spindles may work well when supported only on one side, (I've never supported any spindle utilizing constructions from both sides, but wasn't overly concerned about weight issues) but that would require a much stiffer, possibly lot's heavier 'floor' , so it may be lighter if you dupe the support structure they show there.
Ken.
