Motor pulley size on a jointer

[bobs64ford352]

I'm not having a good string of threads... Shortly after getting the delta 8" jointer I wrecked the stock motor pulley while removing it. I found a pulley in my pile of spare parts, but it is an inch more in diameter. I was playing with a speed calculator site and found that the 3450rpm motor with a 3.5" stock pulley would turn the head at 5366rpm, which has a 2.25" diameter pulley. The 4.5" pulley I found shows it would crank it up to 6900rpm. Is that too fast for the bearings and cutter head?

I will try the auto parts stores for a correct one if it is too much. Tractor supply struck out, the pulley is almost the same except it takes a wide belt and the belt would sit lower slowing down the speed.

Bob

[Unisaw A100]

bobs64ford352 said:

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with a 3.5" stock pulley would turn the head at 5366rpm,

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My Delta No. 37-315 8" is designed to spin at 5175 RPM.

You can look up what you have on the Vintage Machinery site and see what was spec'd.

[bobs64ford352]

Found a post when I searched that delta says the speed should be in the 5k range, so looks like I'll be looking around tomorrow.

Thanks Bob

[TDKPE]

Get a cast iron finished bore sheave from surpluscenter.com. Watch the pitch diameter, as they take both A and B belts, and A belts sit lower in the groove.

[bobs64ford352]

Thanks, I remembered another parts bin I have, that I will look through tomorrow and since I'd like one ASAP, I'll take a quick look local tomorrow. If that doesn't pan out I'll check them out.

[TDKPE]

If you're ok with die-cast aluminium, any good hardware store will have a rack of them. Also check industrial supply houses, which are basically hardware stores that cater to construction. McMaster ships things really fast, and when I lived in NJ, I'd get things next day with standard shipping.

[bobs64ford352]

Just got back from tractor supply they had what I needed, it was a 3.5" die cast. I stopped at a regular hardware store and they only went to 3". Now that that is all fixed up I was turning it by hand I think the inboard bearing might be going bad, looks like I'll be digging deeper.

Thanks all

[JGrout]

I would let it run for at least a little while before calling a bearing that has sat for some time to be bad.......

JME

Joe

[bobs64ford352]

Will do, although it might not be bad to start with fresh bearings, especially since I'm in tear down mode with these things. I'll play with it, some more, I still need to make up a 220V extension cord so I can run the machines where they currently sit.

Bob