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need a pulley for a 4" Rockwell/Delta Jointer

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Forum topic by John Ormsby posted 01-30-2010 07:00 PM 7280 views 0 times favorited 25 replies Add to Favorites Watch
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John Ormsby

1283 posts in 3201 days


01-30-2010 07:00 PM

Topic tags/keywords: jointer

Hello all,

I have brand new old stock Rockwell 4” jointer with an open stand. It came with the wrong motor and pulley. I found a new 1725 rpm motor and am now looking for a pulley. Does any one have one of these jointers with the 1725 motor and larger pulley? I am trying to find out the diameter of the pulley .I believe it is about 6” diameter but am not sure. Your help would be much appreciated.

Thanks, John

-- Oldworld, Fair Oaks, Ca


25 replies so far

View SKFrog16's profile

SKFrog16

661 posts in 2665 days


#1 posted 01-30-2010 07:08 PM

Hey John, do you have a model number. Maybe with that there will be a way to find a manual that will give us an idea.

-- Methods are many,Principles are few.Methods change often,Principles never do.

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Dusty56

11806 posts in 3153 days


#2 posted 01-30-2010 08:46 PM

My old Delta-Rockwell 6” jointer has a 1/2” x 7” pulley on the 1725rpm motor and a 2&3/4” pulley on the cutter head.I know you have the 4” , but I am assuming that in the end , they would turn at the same rpm’s.

-- I'm absolutely positive that I couldn't be more uncertain!

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John Ormsby

1283 posts in 3201 days


#3 posted 01-30-2010 08:48 PM

I have the instruction manuals for this jointer and the stands.

I have the 50-290 open stand. The jointer came with this stand. I have the correct motor for the other stand ( 50-518 ) which uses the 3450 motor and 3” pulley. I can use this on the other open stand. However, the stand 50-290 shows the 1725 motor and larger pulley. I might just use this 3450 motor and pulley and get the link belt pulley to reduce the vibration. The manual for my stand does not indicate the size of the pulley. The manual for the motor and pulley I have states the pulley size (3”).l

-- Oldworld, Fair Oaks, Ca

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John Ormsby

1283 posts in 3201 days


#4 posted 01-30-2010 08:53 PM

Dusty56, are you sure the shaft is 1/2”? Both of my motors have 5/8” shafts. I think the 7 1/2” would be the same pulley for both jointers. The cutterhead diameters are probably the same for the 4” and 6” jointers.

-- Oldworld, Fair Oaks, Ca

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Dusty56

11806 posts in 3153 days


#5 posted 01-30-2010 09:00 PM

I’m sorry , the 1/2” measurement that I gave was for the V-Belt….let me see if I can measure the shaft diameter for you : )

-- I'm absolutely positive that I couldn't be more uncertain!

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Dusty56

11806 posts in 3153 days


#6 posted 01-30-2010 09:25 PM

Yes , the shaft is 5/8” , but the pulley is only 7” as stated above . : )

-- I'm absolutely positive that I couldn't be more uncertain!

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John Ormsby

1283 posts in 3201 days


#7 posted 01-30-2010 09:33 PM

Thanks Dusty for the info.

Now the search goes on for the pulley.

Does anyone have a 7 1/2” diameter x 5/8” bore pulley for sale?

-- Oldworld, Fair Oaks, Ca

View MarkwithaK's profile

MarkwithaK

370 posts in 2642 days


#8 posted 01-30-2010 09:37 PM

Check with Grainger.

-- If at first you don't succeed then maybe skydiving isn't for you.

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Jeison

951 posts in 2572 days


#9 posted 01-31-2010 05:51 AM

may also want to try eReplacementParts.com and Tool Parts Direct

-- - Jei, Rockford IL - When in doubt, spray it with WD-40 and wrap it with duct tape. The details will attend to themselves.

View mcguiver's profile

mcguiver

6 posts in 2227 days


#10 posted 11-04-2010 09:30 PM

Since I am a new member, I will now dive in. I am finishing a restoration on a Delta 37-290, 4 inch jointer and trying to figure out the correct motor and pulley size. So, a 3450 RPM motor can use the smaller 2 3/4” pulley with a link belt or a 1725 RPM motor with the larger mystery pulley with the mystery shaft size. Currently, I have a sears motor that has a 5/8ths shaft at both ends. It probably came from a dual tool use platform. I am assuming that one end of this incorrect motor is used to drive the jointer and the other end will eventually be used to bring me to the emergency room after it winds my pants leg up. Let me know where you found the pulley. I need the 7.5 inch one with spoke wheel if possible. It will make all of my wood projects look better if I feel better. Putting an Ace hardware, washing machine pulley on a Delta 37-290 would be a sad day for this cast iron beauty. Might as well make a pulley out of wood…

-- Brian, Greensboro, NC .....A lie is not a lie if the truth is not expected...

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mcguiver

6 posts in 2227 days


#11 posted 11-04-2010 11:13 PM

Thanks Rick. Very helpful. So, you don’t think that a 3450 rpm with a 7 inch pulley driving a 2.75-3 inch inch jointer pulley will make it go too fast?
I would hate to have my jointer look like the Rolls Royce engine on that Airbus A380 this morning!

-- Brian, Greensboro, NC .....A lie is not a lie if the truth is not expected...

View John Ormsby's profile

John Ormsby

1283 posts in 3201 days


#12 posted 11-05-2010 12:13 AM

The original size pulley for a 1750 RPM motor is 2.75” on top and 6” on the bottom. I would NOT put a 3450 motor with this pulley configuration.

-- Oldworld, Fair Oaks, Ca

View lilredweldingrod's profile

lilredweldingrod

2495 posts in 2571 days


#13 posted 11-05-2010 02:35 AM

John,
Applied technologies.com has just about any pulley or bearing you can think of and they are everywhere. Rand

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mcguiver

6 posts in 2227 days


#14 posted 11-05-2010 09:20 PM

Thanks for all the tips,
I just purchased my bearings from Applied. They were a little expensive but they were the exact bearings required with the extended collar.

-- Brian, Greensboro, NC .....A lie is not a lie if the truth is not expected...

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MedicKen

1610 posts in 2927 days


#15 posted 11-05-2010 09:30 PM

John…..Here is a calculator that will help with determining the correct size pulley for the motor and cutter head.

I have purchased pulleys from Surpluscenter.com. They are well made, cast iron or aluminum and balanced.

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

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