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Ex-Cell-O 602

Doug H

Plastic
Joined
Aug 8, 2022
Is that the original paint color? If so it looks pretty good. Mine was painted black when I got it, ugh. I went back with machinery gray.
I think it is close to the original color, based on a few scrapes and gouges, but I don’t believe it is the original paint. Whoever did the paint did a really great job of masking, but while cleaning it up I have run across some really faint areas of overspray.
 

implmex

Titanium
Joined
Jun 23, 2002
Location
Vancouver BC Canada
Hi Doug H:
The classic way to judge the knee gibs (and the knee wear) is to perform two tests:
1) Snug up the gib at the middle of the stroke, then go to the ends of the stroke...if it gets tight at either end and remains correct in the middle your ways are worn.
2) go to the middle of the stroke, put a clock touching somewhere on the knee close to the outboard end of the knee and another as close to the column ways as you can.
Then waggle the elevation crank up and down through the range of its backlash.
If the outboard clock moves more than the inboard clock you have clearance between the gib and the ways in that location.
Basically you're propping up the knee with the elevation screw and then letting it sag, and the two clocks are telling you how much it sags when the elevation screw is not propping it up.

You can check it at all points of the knee stroke and characterize roughly how much clearance you have and whether its consistent for the whole stroke.
You can judge more accurately how much by propping the inboard end of the knee right next to the ways so it can't drop then lowering the knee onto the prop with the crank until the inboard clock just begins to register (it will even with a solidly propped knee) and then reading the outboard clock.

A third way to tell you if the knee gib is loose is to put on the two clocks as before, then run the table in and out as far as you can without hitting the clocks.
If the knee is rocking as you move the weight of the table past the fulcrum of the elevation screw you'll see it with the clocks.

Cheers

Marcus
www.implant-mechanix.com
www.vancouverwireedm.com
 
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Doug H

Plastic
Joined
Aug 8, 2022
Thanks, Implemex. That makes sense.

Some of us old wrenches get in the habit of thinking we can figure anything out and don’t always ask the questions we should. Most of the time, experience will lead us down the correct path, but sometimes it is just easier to rest on someone else’s experience. Trying to adhere to that mindset as I work on learning a new skill set. So much of machining looks really simple and straightforward, but the more I study, the more I realize that there is a whole lot I don’t know.
 

Doug H

Plastic
Joined
Aug 8, 2022
Had intended to take pictures of the reassembly, but it was so miserably hot that I forgot all about it. Got the knee finished up, and the cross slide. Started on the table, but ran into issues with the table feed assembly. Seems someone misplaced a cap screw. Feels like a totally different machine now. I have to say tho, you can consider this a public service announcement, If you ever get the opportunity to refurbish a machine in the Texas sun, you might want to put it off till cooler weather. I would have waited, but I really wanted to give it a deep cleaning before setting it up.
 

Doug H

Plastic
Joined
Aug 8, 2022
Got it in it's new home. Will run power this week, and also picking up it's new sibling, a lathe. First real project will be a Drawbar for the XLO, then a fine feed knob as well. After that, I will be using both machines to make fixturing to hold 1911 frames and slides. for various machining operations.
 

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Vecair

Aluminum
Joined
Feb 19, 2017
Location
Prescott
Hey Doug does your 602 have a cover over the knee bevel gears or are they open? Mine has a cover and so far I see no way to lube those gears, which I find strange. Can't remove the cover without pulling the table so I am wondering what you found. I have seen a few with open gears. Thanks!
 








 
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