Need Help!- 4020 Turcite

[Billet Sean]

Hi, I have a 4020 that I need to replace the Turcite on the X and Y axis. I took the table off yesterday, I know that I need to replace the turcite on the table and straps. I'm getting ready to take the saddle off and see where I need to replace it there. Any one have any suggestions on how to reapply the turcite? Do I need to have my table and ways "scraped"? I know that my oil pump quit working and I need a new x axis ball screw. It's been a nightmare lately! I would appreciate any help!
Thanks,
Sean

[alfalfa]

We reworked an old OKK VMC several years ago. When we bought the replacement material, they recommended an epoxy that we used. It worked great. Our process...if you wanted to know: remove all old material - CAREFULLY, clean well (solvent, then denatured alcohol), dry completely (hair dryer or hand torch), apply epoxy evenly, install new material, clamp/weight evenly (we made an I-beam that fit the material and machined one side flat to minimize the amount of distortion in the flatness of the new material.) After epoxy was well set, we used a die grinder/dremel type tool to carve new grooves in the new material (for oil dispersion). Be careful not to carve all the way thru the new material. The grooves may or may not be needed with yours, if possible - observe the old stuff before pulling it. As far as scraping the ways....you'll have to see what they look like. If there is minimal damage to the metal - they probably don't need to be redone - IMHO.

Hope this helps.

Doc

[billystein]

hi billet,

if you can afford to have it done that is the way. I sent one out about 5 years ago and it was about $1200. table only
or else you will need to bond the turcite to the proper places and then machine it to the proper thickness. make sure you machine the oil grooves and holes for lube flo.

[lnmc66]

Hello, I would recommend the use of brass gibs instead of turcite. Beside the machined brass one easily to find as long as you notice there are difference size that engrave in the back of every single piece. So oder the same size, and replace exactly where it supose to, you dont have to mess with turcite that hard to find the adhesive to use in the process. cheer

[JR1050]

I did this a few years back on my Fadal.Its not hard,but you must be thoroughe.First remove the old turcite.Completely degrease the castings,wash the castings with super clean.I then took a torch and burned all the old glue and oil out of the casting.I bought the turcite from a place in Wisconson.I used waylock for the adhesive.Before applying the glue I washed the casting and the turcite once more with lacquer thinner and blew it dry with clean compressed air.Apply the glue according to the instructions.Place the strips of turcite on the castings and put weight on it.That was the easy part.I put the saddle and table on the table of my Mattsurra and fly cut the turcite flat.I then ran another program to recut the oil grooves,be sure to measure your old gooves before you destroy the old turcite.I made new straps out of steel and gibbs from alum bronze.You probably need to replace the metering units and lube lines.I made the lines out of nomex cored hydraulic line.The ways are hardened,so dont need to be scraped.After reassembling,re-level the machine.You also will have the joy of lining the screws back up.....while your at it,clean out your motors,put new bearings in them,new brushes and cut the com.