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Thread: Powermatic 300 Sander Rebuild

  1. 12-30-2009, 10:48 AM #1
    Tim Livingston
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    Powermatic 300 Sander Rebuild

    Over 2 years ago I bought a Powermatic 300 sander through E-bay from the Oriskany School district which is 100 miles or so from me, my wife was giving birth at the time I bought it so I was trying to arrange a time to go pick it up when the guy from the school said he was coming to my town the next weekend because that is where his father lived. Double score, my winning bid was $61 I think and the guy delivered it, I gave him $75 and said thanks. Unfortunantly I don't have any pictures of how it arrived but it was in pretty good shape for being 30-40 years old and coming from a school.

    I just started to restore it, I am not worried about making it factory original, I just want to make it very usable. The only issues so far have been the two bearings that needed replacing, they cost $40 each from Kaman Bearing. Also I will have to rebuild the dust cover for the belt side and try to find some turn knobs or make some to replace the stripped out ones from the machine. Here are some pictures.
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  3. 12-30-2009, 10:52 AM #2
    Tim Livingston
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    Here are a few more pictures, the picture of the Dewalt box is the color I am going to paint the sander and the rickety press is what I used to remove and install the bearings.
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    Last edited by Tim Livingston; 12-30-2009 at 2:35 PM.
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  4. 12-30-2009, 1:36 PM #3
    Brian Lindenlaub
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    Looks like a good project Tim. Keep us posted on your progress.
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  5. 12-30-2009, 5:57 PM #4
    Bob Aquino
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    Nice sander, excellent price. I have a 30A that I redid last year. Good luck with the restore. For the life of me, I have never heard of a model "300" sander and if I didnt see the tag, I wouldn't believe it. They are normally a model 30A or 30B or 33, 33B, 35 or 35B. By the serial number, I would put it at a 1963 vintage. Take a looksee here for Powermatic serial numbers: http://wiki.owwm.com/PowermaticSeria...ashx#Sanders_8 and here if you want to see other examples of similar sanders: http://www.owwm.com/mfgindex/detail.aspx?id=655&tab=4
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  6. 12-31-2009, 8:41 AM #5
    Tim Livingston
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    Thanks Bob I was wondering about the age and reading the other charts I have seen was very cryptic but I figured it was between 1961-63. There is one other sander on OWWM listed as a model 300, it was painted gray and looks as if it came from an industrial setting http://www.owwm.com/photoindex/detail.aspx?id=8903 but the base is different than mine, I wonder if they made optional bases during a model year. As near as I can tell it's a model 30 but got the 300 name for some reason, maybe that was some special school system number.
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  7. 12-31-2009, 8:53 AM #6
    Carroll Courtney
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    Pm300

    Maybe they double stamp the zero by mistake,either way that is one nice sander.Dang the price not bad also,so with the cost of the good bearings your still way under.How about afew pics of your bearing press,it also looks good.Keep posting pics of your progress,love to follow along---Carroll
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  8. 12-31-2009, 9:32 AM #7
    Bob Aquino
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    Quote Originally Posted by Tim Livingston View Post
    Thanks Bob I was wondering about the age and reading the other charts I have seen was very cryptic but I figured it was between 1961-63. There is one other sander on OWWM listed as a model 300, it was painted gray and looks as if it came from an industrial setting http://www.owwm.com/photoindex/detail.aspx?id=8903 but the base is different than mine, I wonder if they made optional bases during a model year. As near as I can tell it's a model 30 but got the 300 name for some reason, maybe that was some special school system number.
    I saw that too, so it couldn't be just a fluke of stamping one machine. That funky serial number with the extra -3 on the end is also on that other machine listed on the "mothership".

    Here is the machine I finished up with. The only thing I would do over again would be to shoot the base with something other than a rattle can. You just cant get real good coverage on a large area with one. It was missing some original parts, I keep my eyes open for them and have already gotten the end casting for the belt side.

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  9. 12-31-2009, 10:53 AM #8
    Tim Livingston
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    Mine came with two tables and is very complete, it's just a little beat! The one thing it doesn't have is the fence for the belt sander like yours. If you come across one of those let me know, I think it would come in handy. By the way yours look nice Bob
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  10. 12-31-2009, 11:43 AM #9
    Chip Lindley
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    A worthy Project, Tim! I enjoy seeing any good old machine be brought back to life again. Keep after it.

    Years ago I found a Rockwell 6" belt/12" disc sander in VGC, for less than $200. But, it was missing the CI table for the belt. This was wayy before eBay or CL. Several years later I lucked into the complete table on a pallet-full of odds and ends at a business auction--$10!

    Perservere!
    [/SIGPIC]Necessisity is the Mother of Invention, But If it Ain't Broke don't Fix It !!
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  11. 12-31-2009, 12:59 PM #10
    Carroll Courtney
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    Pm30

    Having the table is a big plus,wish mine had the fence also.Bob,nice job and can't tell rattle from other---Carroll
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  12. 12-31-2009, 1:15 PM #11
    Tim Livingston
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    The arm that holds the belt had some pretty big grooves in it from 40 years of high school kids not caring how the belt was tracking. Let me next say I consider myself a jack of many trades but a master of none, that being said I tried a new process today, I do a little welding on the side just as another hobby and only for personal use, I have TIG, MIG and stick welders and figured I could fill in those grooves on the side so I started researching about fixing the grooves, in the past I have used nickle rod to fix cracks in cast but have had limited success because the extreme heat causes more cracks. Well today I read about TIG brazing which uses a silicon bronze rod and a TIG torch to braze the grooves closed. It's a bit different that oxy-acetylene brazing but also similar. Here are some pictures of the before and after.
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  13. 12-31-2009, 1:19 PM #12
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    Bruce Page
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    That is going to be nice when you're finished!
    I refurbed an older Delta a few years ago but it ain't half the machine those old PM's are.
    I'm looking forward to the finish pics.
    Please help support the Creek.


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  14. 01-03-2010, 4:10 PM #13
    Tim Livingston
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    Quote Originally Posted by Carroll Courtney View Post
    How about afew pics of your bearing press,it also looks good.Keep posting pics of your progress,love to follow along---Carroll
    The press is nothing special, I borrowed it from a friend but I can see I need to build one similar but a little more heavy duty. It is basically some channel iron welded together and teh bottle jack is not a permanent installment. Here are some pics of it, as you can see the bottom rails are adjustable and the top got reinforced after the fact.
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  15. 01-03-2010, 4:13 PM #14
    Tim Livingston
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    Just a small update of pictures, haven't worked on it all weekend because I am working nights.

    Anyone have a source for the original adjustment knobs? If not I will probably make some new one but that is going to mean I am going to have to get off my butt and get my South Bend lathe up and running too which is going to require me to build a new stand for it because the tired old wood table is.....well tired.
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    Last edited by Tim Livingston; 01-03-2010 at 4:16 PM.
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  16. 01-03-2010, 4:51 PM #15
    Rob Calkins
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    keep the pictures coming...that is going to be one nice machine.
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