Repco Power type C10 cylindrical grinder

[shedeng]

Hi all.

I am trying to bring back to useful a grinder that I acquired more than twenty years ago.
The machine was working when I went to look at it but when it arrived at the factory it was not and everyone involved said "not me".
I stripped the machine to see what was wrong and found that some one had tried to bring the grinding head forward and didn't know when to stop stripping the rack and pinion drive. Only too easy to do as the pinion is driven by an 80 to 1 worm drive.
I started to fix it but things didn't go to plan and it has sat under cover till now.

I need knowledge such as what grade of hydraulic oil to use as what was in the tank was like treacle. Not at all like any oil I've seen used for hydraulics.
The machine is 40+ years old and I think the oil was too.
There was a growth of some sought in the tank as well.

An operator's manual and or maintenance manual is probably asking too much but there must be someone left out there with some ideas.

Here's hoping.

Robert S

[Michael G]

As we always say, pictures of the machine would help.

Michael

[simonl]

Hi Robert,

Hate to disappoint you but it sounds like your machine is a throw away. I'll be happy to dispose of it for you! :D
I assume you have done the usual google search for a manual? It's amazing what is out there. As Michael states, pictures, pictures, pictures!

Simon

[simonl]

Is it similar to the one here, fifth machine down?

Edit: I'll even add the link! http://www.apexmc.com.au/grinders/grinders.htm

Simon

[.RC.]

I assume you are looking in the hydraulic tank and not the coolant tank...

I would say an ISO46 hydraulic oil or even an ISO32...

The wheel head may very well have it's own pump and tank to lubricate the plain bearings... In any case you would probably need some very light oil for that.. I run ISO15 oil in my cylindrical grinder wheel head..

You will need to determine what oil goes where... As there will also need to be oil for the ways...

[simonl]

I run ISO15 oil in my cylindrical grinder wheel head..


Crickey, I thought I had a hard time getting ISO32 for a machine that stipulates tonna 27! How long did you have to look to find a supplier of ISO15?

Simon

[.RC.]

Off the shelf item in the tiny Mobil depot in Rockhampton...

Apparently used in hydraulic systems somewhere in the area in a big enough quantity to warrant stocking it...

[simonl]

Well I just had a look at the one at Apex Machinery on the pretence that I wanted to buy. I was hoping to find a label or labels to say what lubricants but nothing at all. So took a few pics anyway... because I could.

347700[q/ATTACH][ATTACH]347702
Its a dark and dingy place where that "showcase" their machines. Light was bad and had to use my phone as a torch.

Simon

[matthew_g]

Well I just had a look at the one at Apex Machinery on the pretence that I wanted to buy. I was hoping to find a label or labels to say what lubricants but nothing at all. So took a few pics anyway... because I could.

347700[q/ATTACH][ATTACH]347702
Its a dark and dingy place where that "showcase" their machines. Light was bad and had to use my phone as a torch.

Simon
I love it at APEX !!!
Dark and dingy is just the way I like it.....
I do believe though, had you asked, Derek would have probably known or been able to find out what oils go where for you....

Matt

[shedeng]

Sorry about no pictures. I am used to reading posts but not creating them.
I'm waiting for the camera's battery to charge up then I'll try to load some pictures.

Simonl,
The grinder at Apex is a type C10U mine is a C10S, a bit different.
I am actually a bit disappointed with the M/c apart from the damage to the rack & pinion.
A bit of history first. This is the second Repco cyl. grinder I have had. The fist was a 50's vintage Pauer & co. That was a one owner when I acquired it in the mid 70's. The table ways were as new as both table and base had been finely scraped and the old fellow who used it most knew how to look after M/c's.
On this later model M/c it appears as though neither the table or base has been scraped. The table still has grinding marks visible on both the flat and the vee ways in the center section indicating that the table is not straight. Only the ends show signs of wear.
The scraping marks on the base don't look like they were done by someone that knew how to scrape.
I think at one stage in its life the flat way on the base acquired a deep score at one end that somebody with no knowledge tried to scrape out resulting in the table travel resembling a big dipper.

RC.
ISO46 is what I'm going to as I already have enough.
I think that ISO32 is too light for the slide ways which use the hydraulic oil for their lubrication.
The wheel head bearings in the early M/c and this one are angular contact bearings so I only have to worry about dried out grease and how to fix.

Mathew_g.

Apex was a much more interesting place when Derek's father was still actively buying machines.

Now to try and give you some pictures to look at.

Robert S

[simonl]

Sorry about no pictures. I am used to reading posts but not creating them.
I'm waiting for the camera's battery to charge up then I'll try to load some pictures.

Simonl,
The grinder at Apex is a type C10U mine is a C10S, a bit different.
I am actually a bit disappointed with the M/c apart from the damage to the rack & pinion.
A bit of history first. This is the second Repco cyl. grinder I have had. The fist was a 50's vintage Pauer & co. That was a one owner when I acquired it in the mid 70's. The table ways were as new as both table and base had been finely scraped and the old fellow who used it most knew how to look after M/c's.
On this later model M/c it appears as though neither the table or base has been scraped. The table still has grinding marks visible on both the flat and the vee ways in the center section indicating that the table is not straight. Only the ends show signs of wear.
The scraping marks on the base don't look like they were done by someone that knew how to scrape.
I think at one stage in its life the flat way on the base acquired a deep score at one end that somebody with no knowledge tried to scrape out resulting in the table travel resembling a big dipper.

RC.
ISO46 is what I'm going to as I already have enough.
I think that ISO32 is too light for the slide ways which use the hydraulic oil for their lubrication.
The wheel head bearings in the early M/c and this one are angular contact bearings so I only have to worry about dried out grease and how to fix.

Mathew_g.

Apex was a much more interesting place when Derek's father was still actively buying machines.

Now to try and give you some pictures to look at.

Robert S

WRT the hydraulic oil, my surface grinder uses the hydraulic oil to automatically lube the ways and it stipulates ISO27 grade. I use 32 since it's a bit easier to get. Not saying 46 won't be OK though. I have always been interested whether the ISO grade is more important for the ways lubrication or the piston/table movement and the hydraulic pump. When the machine has been running for a while, the oil gets quite warm and thins even further. It may have to do with the thickness of the oil film on the ways and how it effects the flatness of grind, of course that would be more important when it was new. Maybe it's no longer all that critical after 60 years of age?

Simon

[shedeng]

I hope these satisfy for now.

[Michael G]

http://www.woodworkforums.com/attachment.php?attachmentid=347752&d=1432205336

That is some really comprehensive damage - but it can be repaired (actually I'd replace it but overall the machine will live again!). Has the rack been damaged at all? Easier to replace one part than to have to do two.
Michael

[shedeng]

MichaelG. Unfortunately I no longer have the rack to show you. It was much the same almost the whole length of travel as it was wound back after the first damage.
At first I rotated the original piece about 40 degree and cut a new rack only to discover that the new one had more teeth than the stuffed one! Out one and a half teeth in seven inches. How could I have made such a blunder? It turned out that mine was right!
I had cut the rack to the same depth as the original as there was enough complete teeth at one end to measure but when I tried it in the housing against the new pinion it had way to much clearance so I ended up making a completely new rack.
I wonder what effects the miss match had on the in-feed.

Robert S