WTB: gorton pantograph parts
i'm not sure this is the right place to start but i need a bearing that goes between the upper and lower
bars on a 3u pantograph. in the book i have the numbers are, B.B. cup 3256-A, B.B. cone 3251-A,
felt 7503-A, and stud 5997-A. i talked to the guys at famco machine in racine but they didn't have
any available. so any help would be appreciated. thanks Rick
Last edited by sawz5; 06-16-2012 at 08:42 AM.
Reason: wrong part name
I don't know about the bearings, but I do have a set of collets I belive that fit that machine.
If interested, firstname.lastname@example.org
The terms cup and cone indicate you need a tapered roller bearing, like those made by Timkin. You should be able to figure out the bearing dimensions from your existing parts.
thanks larry, but i do know they are ball bearings. there were some small steel balls left around the bars.ilooked in all the books i have at wok but there were no numbers matching those in the book.the balls measure .125 the race measure about 1.003
For my 3-U I found that those were unobtanium non-standard bearings. I ended up boring out the arms to accept standard sized bearings. Where clearance allowed I used cam followers (see http://veridicalsystems.com/gallery/...U/dsc_0167.jpg). From the other pictures in that directory you can see one of the spacers used for a conventional bearing.
Originally Posted by sawz5
IIRC I replaced every bearing on that machine, for several I had to bore out oversize, make, press in, and ream new bushings. Spent more time doing that that I have using it since, but it does work nice now :-)
thanks steve, we do have some cam followers at work so guess i'll have to follow your lead and do some
machining before i can use this "free" gift. oh did i forget to say this pantograph was given to me.
Do you have a part number and/or mfg. for the bearings?
the only part number i have is the one in the gorton manual. they are B.B cup 3256-A and B.B. cone 3251A. i don't know i they
are bearing mfg. no. or gorton part no. but the guys in racine said they couldn't supply them.