Covel surface grinder : Tossed some paint on .
- Thread starter thieltech
- Start date
thanks ! the parts were in great shape for the most part so that makes the end result easier to achive.
i did end up turning the motor rotor shaft down to 5/8" it was just to damaged and the run out was terriable.
But the shaft on gear box is 5/8" as well so i doubt i will have any problems with the smaller shaft size on motor.
Theres a good thump from the crapie belts as motor and pulleys rotate.
And i did find some dayco gold cog belts that were cut , so there ordered and on there way. That should solve that problem hopefully
That is just beautiful. Your attention to detail is nothing short of perfection.
I have one question for you. Is that constant revering of the motor hard on it? The only surface grinders I've run have all been hydraulic driven. Thanks.
Mike
I have one question for you. Is that constant revering of the motor hard on it? The only surface grinders I've run have all been hydraulic driven. Thanks.
Mike
lease see AKevin54
MEMBER EMERITUS
Absolutely fantastic beautiful work/restoration. I'm like others.....I hate to run it for fear of getting it dirty. I have a Thompson Surface Grinder that I need to tear into this year as soon as I get some room to work on it.
What is the red paint you used. I know that it is a special paint, but not sure off the name. It's oil resistant paint, and tougher than your normal paints.
But you did a super fantastic job. I just hope mine doesn't take that long to get up and going. But I won't be doing a total teardown either (I don't think) I may now though after seeing your thread.
What is the red paint you used. I know that it is a special paint, but not sure off the name. It's oil resistant paint, and tougher than your normal paints.
But you did a super fantastic job. I just hope mine doesn't take that long to get up and going. But I won't be doing a total teardown either (I don't think) I may now though after seeing your thread.
Absolutely fantastic beautiful work/restoration. I'm like others.....I hate to run it for fear of getting it dirty. I have a Thompson Surface Grinder that I need to tear into this year as soon as I get some room to work on it.
What is the red paint you used. I know that it is a special paint, but not sure off the name. It's oil resistant paint, and tougher than your normal paints.
But you did a super fantastic job. I just hope mine doesn't take that long to get up and going. But I won't be doing a total teardown either (I don't think) I may now though after seeing your thread.
Thanks much
its Glyptal. seals castings so oil etc dont seep through . also seal in dirt / casting sand that u cant get to.
bczygan
Well-known member
Kevin54
MEMBER EMERITUS
I wasn't sure whether that was the name of it or not, but thank you so much.
And again, FANTASTIC job
Tossed some paint on ...
Ok, make sure to take pictures if and when you decide to restore it! I like to see that if you call this tossing paint!
Seriously, amazing work. I could not bring my self to use it, too beautiful!
Ok, make sure to take pictures if and when you decide to restore it! I like to see that if you call this tossing paint!
Seriously, amazing work. I could not bring my self to use it, too beautiful!
Absolutely one of the purtyest restorations I've seen. But I have to ask, in the bearing block above it has plugs in the casting where it looks like a lube fitting should go, either grease or oil. Are the plugs original to the machine?
lg
no neat sig line
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Well, I can see you enjoy fixing things up - a lot!
Talking about dust - does this unit not have coolant system, I don't see it!?
I have only used one of these (actually can't remember what brand, old US model) and dust per se is not a problem. However the coolant can create a mess sometimes.
Absolutely one of the purtyest restorations I've seen. But I have to ask, in the bearing block above it has plugs in the casting where it looks like a lube fitting should go, either grease or oil. Are the plugs original to the machine?
lg
no neat sig line
Thanks !
the plugs were in there when i got it.
i did notice the bushings bleed oil after i cleaned them multiple times.
so i filled the holes with oil a couple times figuring it would soak into bronze bushings again. i then installed plugs .
i will periodically oil them to.
i have a hour meter to install to.
sakurama
Well-known member
That was worth every minute that I didn't have. Love it.
Gregor
Gregor
i do have the whole coolant system that came with it , has heavy sheet metal tank and cast iron top . 120v cast pump and lines. with drip pan for alone back of machine .
and stainless steel jet
i still have the big sheet metal guard that covers the whole table to finish .
its heavly pitted on one side , so it needs some heavy body work .
i do have it all straightend up though.
i havnt decided if i will put coolant on this machine . worried about the mess and rusting everything up!
I am by no means an expert on this, so take this with a grain of salt.
But you use additives in the coolant water to make it none corrosive. So this should not be a problem.
And by using coolant you increase the accuracy of the surface - depends on several variables like, material, thickness, structural stability (thin plates warp under the heat of the grinding stone), grinding speed... etc - and the lasting of the grinding stones. The dust problem is also solved but naturally coolant spray causes mess. However, wiping it clean after use is probably easy with the smooth surfaces and your fantastic paint job.
I guess this decision depends on what you intent to use it for.
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What a fun thread. I wish I understood a quarter of the technical terms being used here but I'll follow along as best I can.
When I started scrolling through the pictures I thought for sure the restoration would bog down, but as I kept going my jaw dropped further and further. What a job you did! (Even if I had five years, all that I'd have to show for it would be a pile of greasy parts.)
I would like to know about the electronics however, what the Hitachi units (and the GE ones they replaced) do? They look pricey is all I can tell.
When I started scrolling through the pictures I thought for sure the restoration would bog down, but as I kept going my jaw dropped further and further. What a job you did! (Even if I had five years, all that I'd have to show for it would be a pile of greasy parts.)
I would like to know about the electronics however, what the Hitachi units (and the GE ones they replaced) do? They look pricey is all I can tell.
Grigg
Well-known member
If you have coolant you'll surly want to use it. I've had two old dry surface grinders and they make as much or more mess than the DoAll I have now with coolant. Also can turn out better work faster with coolant.
Here is a lousy picture of my grinder. It's "restoration" pales in comparison, mainly consisting of a good cleaning, flush the hydraulics, some new stainless splash guards and rework and replacement of all the Bijur lines and metering units.
https://lh6.googleusercontent.com/-.../CMibj2OSD3o/s912/IMG_20140415_180950_080.jpg
Keep up the good work!
Grigg
Here is a lousy picture of my grinder. It's "restoration" pales in comparison, mainly consisting of a good cleaning, flush the hydraulics, some new stainless splash guards and rework and replacement of all the Bijur lines and metering units.
https://lh6.googleusercontent.com/-.../CMibj2OSD3o/s912/IMG_20140415_180950_080.jpg
Keep up the good work!
Grigg
bp460
Well-known member
Surface grinding is a very specialized skill and an art form. As a mold maker, I have spent over a dozen years perfecting the craft and there is always more to learn. It can also be very dangerous, as a grinding wheel is very unforgiving. Please take the time to read up on grinding wheel and machine safety if you haven't already done so. Also, there are a lot of very talented machinists on GJ that can probably answer any questions you might have in regards to safe grinder operation and procedures.
I highly recommend upgrading to a "gear nut" style locking system for your surface grinder spindle. http://www.mscdirect.com/product/details/98829153?item=98829153&fromRR=Y
It eliminates the "hammering" that is unavoidable when using the stock wrench and retaining nut. In every shop I have worked at, every surface grinder had a gear style retaining system. At some shops, hammering on class 7 spindle bearings was a fireable offense.
If you prefer to not use coolant in your grinder, you will want to use a Vac-U-Guard or similar wheel guard and a dedicated dust collection system that can handle sparks. The dedicated systems by Torit can be expensive, but I have heard of folks building there own using a fireplace vacuum as a pre-filter.
-Brad
I highly recommend upgrading to a "gear nut" style locking system for your surface grinder spindle. http://www.mscdirect.com/product/details/98829153?item=98829153&fromRR=Y
It eliminates the "hammering" that is unavoidable when using the stock wrench and retaining nut. In every shop I have worked at, every surface grinder had a gear style retaining system. At some shops, hammering on class 7 spindle bearings was a fireable offense.
If you prefer to not use coolant in your grinder, you will want to use a Vac-U-Guard or similar wheel guard and a dedicated dust collection system that can handle sparks. The dedicated systems by Torit can be expensive, but I have heard of folks building there own using a fireplace vacuum as a pre-filter.
-Brad
bp460
Well-known member
And you are doing an amazing job refurbishing the grinder!
-Brad
-Brad
Step over was .040"
feedrates kinda tough because of the Mechanical variable drive and the vfd .
but the Mech variable drive was set about 1:1 and freq was 40Hz or so.
I will do some more tomorrow and make a video to show how i was running it. maybe that will help get me on the right path better.
Thanks
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From what I see, it looks like the material you were grinding is rather soft and was burning slightly. That's a wheel / speed & feed issue.
I don't see any "machine issues" in the finish, so I'd say the overhaul went well!
I don't see any "machine issues" in the finish, so I'd say the overhaul went well!