Interesting C-list find, Question

[jsburger]

Oh, but the jointer would work as set up? Sorry, not sure if that got answered and I’m not reading between the lines enough.

Yes, the jointer will work as designed. It just needs to be lowered down on the tube rings to be at the correct height to connect to the head stock pulley adapter.

The adapter is correct and the jointer is correct (minus the fence???) and the head stock pulley is correct. It will work. Sellers part out jointers all the time on eBay so a fence will not be hard to get.

[jsburger]

Another question. Here are some miscellaneous pulleys that came with my 10ER. I’ve never been sure whether they are shop smith or unrelated. See anything that would be useful or that looks familiar or important?

The only pulley that is unique is the head stock pulley. The shaft and the pulley bore is 13/16". That is a non standard diameter today. Other than that there is nothing unique about the 10ER pulleys.

[chapmanruss]

That is a nice find having the "A" Adapter and especially the SPT headstock pulley. You can easily pay that much or more for just either of them.

As for the jointer in the ad It appears that the mounting posts are not the original posts for the Jointer and may be the belt sander posts which are longer. It appears they could work in aligning the Jointer to the SPT Headstock Pulley having the "A" Adapter up instead of down for the normal position for mounting the Jointer with the special mounting posts included with the later adapter kit. If so that would be a sturdier mounting position than using the special long Jointer mounting posts with the "A" Adapter down. As for operating speed for the Jointer the instructions from the second kit say #3 pulley position or about 4000 RPM's with the Speed Changer. This is a slower RPM than the Jointer gets from the Model 10 headrest mounting kit with the 5" motor pulley. It is still a faster RPM than the current speed charts have it at about 3500 RPM's.

Recently I posted a thread on the SPT Mounting Posts (see link below). It and the PDF instructions below will explain what I am referring to above. In the second posting I talked about the adapters and which SPT's were used with which adapter. That text is below.

viewtopic.php?f=10&t=24292

I forgot to include this yesterday. One of the reasons for using collars on the Bandsaw and Magna Sprayer (Air Compressor) straight mounting posts instead of the snap ring appears to be for use on the Model 10 Adapters. SPT's used on those adapters whether the "A" or "B" adapter may sit at different heights to the Model 10 Drive Sleeve Pulley Hub than those on the Mark 5 Drive and Idler Shaft Hubs. The 2nd Adapter Kit included the "A" and "B" Adapters plus long posts for the Jointer. The Air Compressor was introduced about the same time as the 1st Adapter Kit and collars were used on its posts to allow for that adjustment. The Bandsaw was introduced about the same time as the 2nd adapter kit. The Jointer and Air Compressor mount on the "A" Adapter and the Jig Saw, Belt Sander and Bandsaw mount on the "B" Adapter. The original Power Mount Adapter Kit only had the "A" Adapter. It was for mounting the Jig Saw and the Air Compressor (Magna Sprayer) with no provision made for mounting the Jointer. Because the "A" Adapter sits higher the Jig Saw's snap Ring posts were inverted and collars used to set the height. There wasn't a mounting option for the Jointer with the 1st Power Mount Adapter Kit since Magna still sold the Model 10 Jointer mounting kit with the special headrest. Like the Model 4E Jointer the Model 620 jointers still had the mounting holes for that kit until the Jointer changed to the Model 620-C.

The Power Mount Adapter Instructions for both kits are the PDF's below.

Power-Mount Adapter 11-800 01-55.pdf

(150.32 KiB) Downloaded 136 times

Power-Mount Adapter Kit 11-920 02-56.pdf

(327.47 KiB) Downloaded 127 times

Lastly, any parts needed for the Jointer can be replaced with even new current Jointer parts. All the upgrades/changes that have occurred since the Model 620 Jointer replaced the 4E are compatible. Some drilling and tapping is required for certain upgrades.

[DLB]

[Jointer]...It is still a faster RPM than the current speed charts have it at about 3500 RPM's...

While I don't know the reason for it, some resources list main spindle RPM even for tools mounted to the lower spindle (which is 1.6X faster) on a Mark headstock. I noticed this while trying to figure out the scroll saw. I think that is the case here, and the Jointer nominal speed is actually in the 5500 RPM range. My Jointer manual says 3900 - 6200 RPM.

- David

[chapmanruss]

David,

You are correct about the actual speed used for the Jointer. Sorry I caused confusion on this before. My head has been in a bit of a fog the last couple days. I didn't account for the speed difference of the lower aux. spindle. The speeds in the charts are speeds for the main (upper) spindle not the aux. (lower) spindle that the Jointer actually uses. The speeds in the charts both printed and in the Power Pro Headstock ALL refer to the main spindle so you do not have to do the math for the difference. That actual speed is much closer to the speed the Model 4E Jointer runs at using the 5" motor pulley to the 1-3/4" pulley on the Jointer. The speed is listed as 5000 RPM's recommended in it's manual. The recommended speed from the Model 620-c Jointer manual of 8-72 is 4900 to 5900 rpm.