Harrison 600 Milling Machine

[Carl Wilson]

Fantastic job, I just hope mine looks as good. I will try to get back to you on the oil question.

 

[RichardM]

Nice job Could you fit a new sight glass?

 

[Guzzi Fuzzi]

Thanks Guys,

I don't want to replace the sight glasses. This is a hell of work. Don't even know from where I can get new once.

Thanks, Carl, it would be good if you can find something on the oil issue. I did some light test mills which went well, I don't wnat to stress the samll lady before I did not replace the oil completely. Now I am working on a nice lamp mounted on the body. I am getting older, my eyes too, in the meantime I have mounted lamps on all of my machines.

 

[Mark Davison]

I replaced a cracked sight glass in the gearbox cover on mine. It was a doddle and i wishbid done it sooner. now no more leak. They are on ebay, about £13 each and come with instructions. The gearbox casing on my vertical mill is probably different to the horizontal model though, i assume your sight glass isn't on a removable panel?

 

[Agroshield]

...But I can't see the level on the vertical head because of the dirty glasses.

Can you drain the oil into a graduated container and put back the same amount?

Is there any access to the surface of the oil from the filler hole? If so poke a wire in until it hits the bottom and measure how far up the wire it comes. Refill to same height.

 

[Guzzi Fuzzi]

Thanks Mark, yes on my model the glasses are fitted into the head body directly. But do you hvae the link to that ebay offer?

Unfortunatly I don't know if the right amount is filled. So I cannot even drain it and measure the oil.

 

[Mark Davison]

Just checked my purchase history and it is now disabled, even the buy similar link doesnt come up with any results. Sorry.

 

[Guzzi Fuzzi]

Hi Carl, hi guys



I got it fixed this weekend. I did connect the machine on power. I did use a very strong lamp to check the oil level in the sight glasses.


Even the offset gear box I found the oil level. So, I drained everything up and filled the gearboxes with new hydraulic oil (HLP68).

I did fill the head bearings with a special spindle grease from DECKEL. The mill runs now very smoothly in all drives.

Last but not least I fixed the lamp on it, for me one of the most important things. I am going to do the frist test rides in the next few days. I keep you informed.

 

[Fastdruid]

Yours may be different to mine but I replaced the rear sight glass and filled the front via the panel under the warning/lubrication getting the level correct by looking into the sight glass from the reverse.
Place I got the rear sight glass from no longer stocks them though.

Technically ISO68 is rather thinner than they should have. Mine specifies Vactra Extra Heavy which is ISO220. I'm sure an ISO68 would be fine with light use though.

 

[Carl Wilson]

Hi Guzzi,

Your machine looks pristine. I only hope mine looks that good when I finish it.

I'm looking forward to seeing your first test cuts with it.

Hope you and your family are well.

Carl.

 

[slim_boy_fat]

I only hope mine looks that good when I finish it.

I don't think we need have any fears on that score.

 

[Carl Wilson]

Thanks!

 

[Fastdruid]

Really nice. My one doesn't have the clutch either. It was an option. The Harrison mills used L5 lathe mechanical parts and I'm told it is possible to retrofit a clutch from a Harrison L5 lathe to these machines. I do not know how true or otherwise that is.

Mine does have a clutch and while the clutch is the same as the same era Harrison lathes (L16 and L6 with a few L5 parts) it's somewhat of a bitsa ...there is a different input shaft between the clutch and non-clutch version and a whole bunch of "mill specific" parts (MH1).

You might well be able to use an L6 clutch as a replacement on one that already has a clutch but I think it would be particularly easy to retrofit.

 

[Carl Wilson]

That's interesting to know, thanks.

 

[metric_chris]

Hi there,

As from today I’m also the proud owner of a Harrison 600 mill.

Only downside, the vertical milling head is missing (on the hunt for a unicorn)
And the motor for the table feed.

Does anyone have a manual and partlist / drawings for it?

 

[Trevanion]

Does anyone have a manual and partlist / drawings for it?

I have the purely vertical Harrison machine, I managed to find a manual for a couple of quid on eBay but then I come across this online:

https://ostiatools.co.uk/wp-content...iors-Handbook-Horizontal-Milling-Machines.pdf

 

[metric_chris]

Great thanks for the quick reply’s!

Anyone has experience with fitting a new motor on the table feed with a frequency drive?
I think in this case the best solution.

 

[Agroshield]

Anyone has experience with fitting a new motor on the table feed with a frequency drive?

A good place to start might be to look at the Align power feeds commonly used on Bridgeports. I had a quick look and they seem to be infinitely variable from 0 to 160 rpm. That would tell you the gearing you need from a motor that does 1400rpm at 50Hz.

I think the Align ones are DC motors but that does not matter. They have a dial to set the feed speed and a switch for rapid travel (plus direction and E-stop).

You would have to think a bit about how you would control a VFD in the same way. Let us say that 0 to 50 hz represents the overall speed range you need. I think you would have to have a resistor in series with the potentiometer so that the dial would go from 0 to maybe 25 Hz or whatever the maximum realistic _feed_ rate would be. Then have a momentary switch in parallel that shorts the pot and resistor to give 50Hz for rapid travel.

You do not want to be able accidently to command full rapid with the dial. You will also need limit switches that work properly when you rapid into them. Having the limit switches or trip dogs repositionable* is also an advantage so you can go 10mm off the edge of what you are cutting and auto-stop the feed rather than letting the cutter drive into your coffee cup that you left on the end of the table.

* and also a fail safe at the extremes of travel so if the trip dog slips, it can only slip so far.

 

[metric_chris]

A good place to start might be to look at the Align power feeds commonly used on Bridgeports. I had a quick look and they seem to be infinitely variable from 0 to 160 rpm. That would tell you the gearing you need from a motor that does 1400rpm at 50Hz.

I think the Align ones are DC motors but that does not matter. They have a dial to set the feed speed and a switch for rapid travel (plus direction and E-stop).

You would have to think a bit about how you would control a VFD in the same way. Let us say that 0 to 50 hz represents the overall speed range you need. I think you would have to have a resistor in series with the potentiometer so that the dial would go from 0 to maybe 25 Hz or whatever the maximum realistic _feed_ rate would be. Then have a momentary switch in parallel that shorts the pot and resistor to give 50Hz for rapid travel.

You do not want to be able accidently to command full rapid with the dial. You will also need limit switches that work properly when you rapid into them. Having the limit switches or trip dogs repositionable* is also an advantage so you can go 10mm off the edge of what you are cutting and auto-stop the feed rather than letting the cutter drive into your coffee cup that you left on the end of the table.

* and also a fail safe at the extremes of travel so if the trip dog slips, it can only slip so far.

Im hoping to wire it up to the current controls and limit switch. Should be possible as they are simple contacts I guess

 

[fizzy]

A good place to start might be to look at the Align power feeds commonly used on Bridgeports. I had a quick look and they seem to be infinitely variable from 0 to 160 rpm. That would tell you the gearing you need from a motor that does 1400rpm at 50Hz.

I think the Align ones are DC motors but that does not matter. They have a dial to set the feed speed and a switch for rapid travel (plus direction and E-stop).

You would have to think a bit about how you would control a VFD in the same way. Let us say that 0 to 50 hz represents the overall speed range you need. I think you would have to have a resistor in series with the potentiometer so that the dial would go from 0 to maybe 25 Hz or whatever the maximum realistic _feed_ rate would be. Then have a momentary switch in parallel that shorts the pot and resistor to give 50Hz for rapid travel.

You do not want to be able accidently to command full rapid with the dial. You will also need limit switches that work properly when you rapid into them. Having the limit switches or trip dogs repositionable* is also an advantage so you can go 10mm off the edge of what you are cutting and auto-stop the feed rather than letting the cutter drivdwfie into your coffee cup that you left on the end of the table.

* and also a fail safe at the extremes of travel so if the trip dog slips, it can only slip so far.

Definitely retro fit a Bridgeport one.
The Align are Taiwanese and not cheap. About £400. The Chinese copies are under £200. Not sure what the difference is.