older jointer question

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Forum topic by rpete posted 01-02-2011 08:38 AM 973 views 0 times favorited 6 replies Add to Favorites Watch
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19 posts in 2433 days

01-02-2011 08:38 AM

Topic tags/keywords: question jointer

I’ve had an old Delta Rockwell 37-110 I got from my grandpa that I haven’t really done much with. I’ve always put off doing anything with it thinking I would be getting a newer one eventually. Since “eventually” has never seemed to come around I pulled out the old jointer and have began cleaning/adjusting it and have some questions I wanted to get some input on.

I purchased a copy of the owners manual on ebay and have discovered the pulleys that are currently on the jointer are the wrong size. The pulley on the cutter head is even the wrong bore size and the set screw doesn’t hold it tight. The cutter head is supposed to spin at 4000rpm. In addition, the manual states that the jointer originally came with a 1/4 hp motor. I’m not sure if the motor I have is the original but it does have the same specs as the original. The manual also states that a larger motor can be used as long as the rpm’s stay at 4000.

As I started looking at buying new pulleys and checking out the existing motor, the thought occurred to me that I may be able to run the jointer off of the motor mounted on my craftsman table saw (an old 113.XXX model). That motor is a 1 hp and runs at 3450 rpm’s. What I want to do is get a step pulley that has a 2.5” step for the table saw (matching the existing size), and a 3.5” step for the jointer. I would then mount a 3” pulley on the cutter head of the jointer and build a mobile stand that allowed me to move the jointer in behind my table saw so I can run it off the table saw motor. With those pulley sizes I calculated the jointer operating at 4025 rpm’s.

I just wanted to put this out there to see if anyone had any input/advice/warning, etc. Is 1hp too much for this old jointer? Does the math sound right as far as pulley sizes/rpm’s? Am I crazy for wanting to do this?

Any comments would be appreciated!

6 replies so far

View Don's profile


514 posts in 2490 days

#1 posted 01-02-2011 08:46 AM

Using a larger motor isn’t a problem, it just means you will be able to remove material faster without it bogging down and that’s a good thing. Definately do not exceed the RPM that the cutter head is rated for or you could have blades flying out at you.

-- Don - I wood work if I could. Redmond WA.

View Bluepine38's profile


3336 posts in 2503 days

#2 posted 01-02-2011 05:02 PM

The only problem with the bigger motor is the weight, I bought an older Delta jointer that had been slightly
abused and after purchasing a new pulley for it, I drilled and tapped a hole for a second set screw 180
degrees from the first one, added a new power twist link belt and built a dust collection port for the
jointer. I only have about $75.00 and 20 hours invested and have an excellent 6” jointer. Your 4” model
is just a downsized version and is a very sturdy and capable tool. Most people do not have to joint boards
wider than 2” most of the time, so the width should not be a problem.

-- As ever, Gus-the 77 yr young apprentice carpenter

View Bob #2's profile

Bob #2

3809 posts in 3439 days

#3 posted 01-02-2011 06:59 PM

First: i wouldn’t recommend movng motors back and forth. Your shop time is more valuable.
A half decent 1/2 hp furnace motor (1725 rpm) will most likely cost you about $25.00 from a used furnace.
Have a look at this restoration for some ideas:

-- A mind, like a home, is furnished by its owner

View oluf's profile


260 posts in 2457 days

#4 posted 01-03-2011 05:25 AM

Check your mail. You have a PM.

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

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Bob #2

3809 posts in 3439 days

#5 posted 01-03-2011 05:37 AM

If you mean me , I don’t see one. Could you please check your sent mail to see where you sent it?

-- A mind, like a home, is furnished by its owner

View rpete's profile


19 posts in 2433 days

#6 posted 01-03-2011 05:43 AM

Thanks for the replies everyone! Great info and I’m glad I’m not reaching to far on this one.

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