Magna 4" jointer repair

[Hndymn]

Using an old shopsmith for years that came with a Magna 4" jointer; model 4E; serial # 10253.

The Quandrant assembly, which holds the fence in place and square to the jointer table, appears to be some kind of a pot metal (aluminum?) part. The bolt which holds the fence to the quadrant has stripped out of the quadrant and actually broke out a piece of the quadrant, making it unuseable. The bolt is in two parts, and serves to both bind the assembly to the table with one part of the bolt and ensure that the quadrant will remain at the chosen angle to the table with a different part.

I really don't see how it can be repaired without an expensive machining operation. Does anyone on the forum have a source to go to for replacement parts for these old machines? Thanks.

[JPG]

Current version should fit a 4E.(#42) >$50

joiner quadrant.jpg (121.32 KiB) Viewed 16635 times

[chapmanruss]

Hndymn,

Welcome to the Shopsmith Forum.

As JPG said the

Current version should fit a 4E.(#42) >$50

It actually does fit. I had a stripped-out Quadrant on my first Model 4E Jointer I restored too. The current Model of the Shopsmith Jointer has parts and is based on that original Model 4E Jointer which came out in 1953 made for the Shopsmith Model 10E and 10ER. That being said if you have a need to replace other parts some can be individual parts while others have to be assemblies. As an example, Shopsmith changed the Jointer Cutter Head a few year ago and the knives are still the same but other parts are not.

At serial number 10253 yours is a later Model 4E Jointer and has the later Fence Lock Handle parts which are different from the early ones. In my thread titled SPT's What When and Where, linked below, you can see a picture of the two different Fence Lock Handles (Wrench) and their bolts in the post dated April 5, 2023, near the bottom of page 2. The Fence Lock Handle parts changed later in the 1950's to the one still used today. Changing the handle also required changing the other related parts which includes the special bolt and nut.

viewtopic.php?t=26072&start=10

Some other good news about the Model 4E Jointer is upgrades to the Jointer over the years, like the Feather Guard, can be added to the Model 4E with the exception of the dust chute.

[chapmanruss]

For those wondering what damage happens to the Jointer Quadrant it is shown in the picture below. This can be caused by over tightening the Fence Lock stripping the Internal/External Threaded Sleeve out of the Quadrant casting.

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Quadrant Damage.jpg (81.42 KiB) Viewed 12897 times

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Over tightening can also cause the Quadrant to spread apart at the opening that goes over the Fence Bar indicated by the arrows in the picture below.

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Quadrant end arrows.jpg (105.45 KiB) Viewed 12897 times

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NOTE: the Quadrant pictured above is not damaged.

[Thirty8]

I have an old Magna jointer that the bolt stripped out of the quadrant. I see the new version has a stud that is hollow, a bolt that tightens the inner dowel, a different handle, and a part or two I missed. The mother ship doesn’t have all those parts listed because the parts breakdown is not available right now. I need help as I need to replace all those parts that are attached to the quadrant. Other than the stops…

[JPG]

They cannot find the quadrant part # ???? One of the 17 most needed parts!

[DLB]

I have an old Magna jointer that the bolt stripped out of the quadrant. I see the new version has a stud that is hollow, a bolt that tightens the inner dowel, a different handle, and a part or two I missed. The mother ship doesn’t have all those parts listed because the parts breakdown is not available right now. I need help as I need to replace all those parts that are attached to the quadrant. Other than the stops…

You might be using the term "new" loosely.

502651 is the quadrant, includes stop tab and roll pin
501407 Nylock setscrews (stops) 3 req'd
506721 Dowel pin (1/4" X 7/8")
120396 1/2" flat washer
502895 guide bushing
502890 fence lock handle and hub
506720 sleeve screw

Hopefully I got everything, it seems correct. These are from a 5/82 manual, but the first few PNs I checked showed up on the SS Website so they appear to be valid. Nomenclature is from the manual, the "guide bushing" is the nut that locks the angle and the "sleeve screw" is the bolt that tightens the dowel down.

- David

[chapmanruss]

Thirty8,

Welcome to the Shopsmith Forum.

If you refer to JPG's first post showing the parts diagram you are looking for some or all of the parts that are reference numbers 42 to 50 if I understand you correctly. As I said in my first post, all changes and upgrades can be added to older Magna/Shopsmith 4" Jointers except the Dust Chute to the original Model 4E Magna Jointer. Some parts can be replaced as individual parts while others require being replaced as assemblies.

You said,

I have an old Magna jointer that the bolt stripped out of the quadrant. I see the new version has a stud that is hollow, a bolt that tightens the inner dowel, a different handle, and a part or two I missed.

The stud I believe you are referring to is part of the Jointer Quadrant Assembly part number 502651 (reference # 42 to 44) and has always been hollow with threads inside and outside. The Bushing nut (48) locks the tilt of the fence threaded on the outside of the stud while the bolt (50) locks the fence to the Fence Bar threaded on the inside of the stud. Depending on the age of your Jointer it may have different parts reference numbers 47 to 50 for the lock parts and handle. That change occurred in the 1950's. If yours had the earlier parts, than 47 to 50 will replace them. On the Jointer service parts page all the parts I listed appear to be available.

Post again if I am wrong about what I believe you are asking or if you have additional questions/comments. Knowing what age your Jointer is would help.