Using a bench grinder to power an old jointer?

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Forum topic by bigcreekwoodworker posted 80 days ago 289 views 0 times favorited 2 replies Add to Favorites Watch
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7 posts in 378 days

80 days ago

Topic tags/keywords: jointer bench grinder motor

Hi, I am looking at trading a guy an old snowblower for a Hitachi TR12 router and an old Sears Roebuck 4” jointer with out a motor on it. I am just trying to figure out how much it would cost to out a motor on the jointer. I saw that HF has a 1/2 hp 1725 rpm motor for $99, but also have a 3/4 hp 3400rpm bench grinder for $55. Is the idea of using the bench grinder to drive the jointer a genius or horrible idea? Haven’t seen anyone talk about it that I could find so thought I’d see what you guys have to say.

Thanks for your thoughts in advance.


2 replies so far

View Manitario's profile


2182 posts in 1388 days

#1 posted 80 days ago

It depends on whether you’re going to set up the motor on the jointer as directly turning the jointer head or via a belt. Ideally you want the head turning at the same RPM it was designed for. Too fast is very dangerous (jointer blades flying off = badness) and too slow will give you crappy results. You may need to an appropriate pulley on the motor shaft in order to get the correct RPM.

-- Sometimes the creative process requires foul language. -- Charles Neil

View MrRon's profile


2407 posts in 1749 days

#2 posted 79 days ago

It doesn’t sound like a good idea. The two motors are not built for the same service.

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