Rockwell 37-220 Jointer Knife Size

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Forum topic by fromaway posted 11-19-2017 04:41 AM 1964 views 0 times favorited 3 replies Add to Favorites Watch
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26 posts in 2754 days

11-19-2017 04:41 AM

Topic tags/keywords: jointer rockwell 37-220 replacement knives

A friend gave me this 6” jointer. I think its from the 70’s. It was in need of some TLC, which I’ve done, but I would now like to replace the knives.

I’ve found copies of the manual online. While the schematic they provide shows the part # of the knife, nowhere does it state the size. Reading through threads in forums has not proven to be definitive: some posts contradict other ones.

Does anyone know the size of replacement knives for a Rockwell 37-220? I know it’s close to 6” x 5/8” (or 3/4”) x 1/8” (or 3/32”).

Since I’m in the midst of projects where I’m using the jointer I’ve been reluctant to pull the knives to measure them. I would rather source the right size and then remove and replace them in 1 step.

Would sure appreciate any insight you might have on this question.


-- Nothing is impossible for those that don't have to do it themselves

3 replies so far

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8155 posts in 3002 days

#1 posted 11-19-2017 05:20 AM

Pretty much any of the 6” (or even 6-1/8”) knives will work.

For example, here is a powertec set which states 6×5/8×3/32….

The Infinity set states 6-1/8×5/8×3/32

The actual Delta part number for the knives (37-659 or old #659) listed them at 6-1/8×19/32×3/32

Take your pick ;-)


-- Brad in FL - In Dog I trust... everything else is questionable

View fromaway's profile


26 posts in 2754 days

#2 posted 11-19-2017 10:42 PM

Thanks Brad. I wasn’t certain how exacting the measurement had to be. You’ve cleared it up.


-- Nothing is impossible for those that don't have to do it themselves

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