Original Powermatic 3520

[Lou Jacobs]

Are the files for those Cole jaw buttons on line somewhere? I’d like to ask my son in law to make a set for me. I have been using rubber corks, but they are too soft

I believe this is the file. It is for four of the buttons so you can print eight in two batches. I hope this link works.

file:///var/mobile/Library/SMS/Attachments/96/06/98FD4BF7-92D2-4B2A-948B-5FA2583A8CA4/4%20x%20Button,%20small%20diameter.stl

 

[Brian Gustin]

I believe this is the file. It is for four of the buttons so you can print eight in two batches. I hope this link works.

file:///var/mobile/Library/SMS/Attachments/96/06/98FD4BF7-92D2-4B2A-948B-5FA2583A8CA4/4%20x%20Button,%20small%20diameter.stl

It won't except for you. It is still on your computer - You need to hit the "Attach Files" button below left when you open a reply. Not sure it will allow something like the .stl file to be attached though - You may have to put it into a zip file and upload to something like google drive and make it public (or accessible by link)

 

[Lou Jacobs]

Thanks Brian, I’ll have to work on this a bit. I also want to be sure I’m not violating anyone’s copyright.

 

[Tom Gall]

I'm not a fan of cole jaws period. I never got comfortable with them. I have a vacuum chuck I use to take my tenons off and I love it. Unfortunately it won't fit the Powermatic with an adapter since it goes thru the headstock. As long as it's 16 inches and under I'll still do that on the Grizzly.

I never used Cole/Jumbo jaws either ... not a fan. Do a search (top right corner) to see discussions about this topic.
Not sure what you mean about not using vacuum on the Powermatic.
Here's a link to a previous discussion ... click on the title.

Post in thread 'Cole jaws tip'

Jul 9, 2022

Below is my quote from a similar topic on Nov. 2, 2020. [edited]

"Re: Cole / Jumbo Jaws. I never trusted them and they are too fiddly when changing sizes. I like Flat Jaws with added softwood plates which are easily adaptable for different sizes and probably a lot more secure. Only problem with Flat Jaws is size limitations due to the small size of the metal plates that attach to the chuck....you can't go too large with the wood plates for safety. When I had the opportunity to purchase a set of Cole Jaws (Oneway Jumbo Jaws in my case) at an estate sale (cheap) I did so...and then added...

• Tom Gall

• 

 

[Dean Center]

Thank you for all the info! It had three leg levelers on it. My husband installed new ones and I can't decide if it's too high or not. I'm fairly tall (5'9) but we'll see.

At 5' 9" you will probably be OK with the height when no leg levelers are installed, but then you can't level the bed (which I think is important). Maybe some slender shims instead of the leg levelers, which add at least an inch. Lathe height is so personal, though, you really do have to try it and see, as you say.

 

[Gregory Hickman]

There are quite a few shorter ladies I've seen turn at full size lathes and do it at a high level. Cindy Drozda comes to mind right off the bat.i don't think you'll have an issue, even with levelers. As @Dean Center said though, lathe height is very personal.

Gregory

 

[Christey Gibson]

I never used Cole/Jumbo jaws either ... not a fan. Do a search (top right corner) to see discussions about this topic.
Not sure what you mean about not using vacuum on the Powermatic.
Here's a link to a previous discussion ... click on the title.

Post in thread 'Cole jaws tip'

Jul 9, 2022

Below is my quote from a similar topic on Nov. 2, 2020. [edited]

"Re: Cole / Jumbo Jaws. I never trusted them and they are too fiddly when changing sizes. I like Flat Jaws with added softwood plates which are easily adaptable for different sizes and probably a lot more secure. Only problem with Flat Jaws is size limitations due to the small size of the metal plates that attach to the chuck....you can't go too large with the wood plates for safety. When I had the opportunity to purchase a set of Cole Jaws (Oneway Jumbo Jaws in my case) at an estate sale (cheap) I did so...and then added...

• Tom Gall

• 

My oneway vacuum chuck is 1x8 tpi and the 1 1/4x8 adapter I currently have for the PM doesn't have a hole thru it so I have to look at getting another spindle adapter or just use the other lathe

 

[Christey Gibson]

At 5' 9" you will probably be OK with the height when no leg levelers are installed, but then you can't level the bed (which I think is important). Maybe some slender shims instead of the leg levelers, which add at least an inch. Lathe height is so personal, though, you really do have to try it and see, as you say.

We took the levelers off yesterday after I turned a bit and it's better without them.

 

[Christey Gibson]

There are quite a few shorter ladies I've seen turn at full size lathes and do it at a high level. Cindy Drozda comes to mind right off the bat.i don't think you'll have an issue, even with levelers. As @Dean Center said though, lathe height is very personal.

Gregory

It is personal. We took them off yesterday and it felt a lot more comfortable for me. I've had a couple of surgeries on my right arm and the higher height was causing a strain I didn't like. Simple thing to just adjust it.

 

[robo hippy]

I did have my PM up on 4 by 4s. I am 6 foot tall. I would suggest keeping the levelers on for a while, mostly to make sure the lathe sits dead flat on the floor. I do like my lathes a bit higher than most. Rather than having my hands at waist level, I prefer them to be closer to mid chest height.

robo hippy

 

[Tom Gall]

My oneway vacuum chuck is 1x8 tpi and the 1 1/4x8 adapter I currently have for the PM doesn't have a hole thru it so I have to look at getting another spindle adapter or just use the other lathe

Just drill a hole through the adapter. Doesn't have to be very large. You can drill it on the lathe (nice) or at the drill press - doesn't even have to be on center. I did that many years ago for some home made 1x8 vacuum chucks.
The Oneway vac chuck should also have an insert. You can just swap that out and eliminate the adapter.

 

[Wyatt Holm]

If someone doesn't need a continuous digital tachometer readout, but perhaps just wants to check the speed or calibrate a speed knob, there's a simple option that works very well. I keep this optical tachometer in my case of instruments (along with thermocouples, wind speed, light and sound meter, etc.)

View attachment 70979

https://www.amazon.com/gp/product/B004Q8L894

All that may be needed is stick a small piece of reflective tape on the shaft, turn on the machine, aim the hand-held tachometer at the rotating shaft, and push the button. The RPM will be displayed. This will work on anything and no magnet needs to be mounted, no need to supply power. It has a battery in the handheld reader - claims to read from 2.5RPM to 99999 RPM. (If anything is run up to 99999 rpm I'll be in the other room.)

I've used this to make some lines outside of a speed knob so I would know the approximate speed anywhere on the dial. For example, on one machine I drew a line at 500, 1000, 1500, etc. since I didn't need to know the exact speed. In fact, I find I seldom need to know the exact RPM of anything.

Just an idea.

JKJ

Good idea! I usually don't care exactly what my rpm is. My Vicmarc has a chart that says roughly what speed I have. I recently put a vfd on a 1961 Powermatic 90. It would be interesting to know what speed I'm getting.

 

[Darryl Fective]

I did have my PM up on 4 by 4s. I am 6 foot tall. I would suggest keeping the levelers on for a while, mostly to make sure the lathe sits dead flat on the floor. I do like my lathes a bit higher than most. Rather than having my hands at waist level, I prefer them to be closer to mid chest height.

robo hippy

My eyes like the spindle higher/closer.