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Harrison Universal Milling Machine Feed Gears & 3Phase

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Steve Taylor 214/04/2011 18:48:07
35 forum posts
6 photos
I recently acquired a Harrison Universal Milling Machine, which seems to be a real beauty, however there are a couple of questions I would like some help with.
 
1\ there appear to be some feed gears missing and I dont know what they should be, also the manual dosnt state what feed speed gears you would achive with each combination.
The ones I have are 59T 52T 43T 22T 29T. I can see that 59 and 22 are a pair as are 52 and 29, I dont know what 43 would combine with and what feeds I would be able to get.
 
2\ the machine has 3 motors, main spindle motor 2HP, feed motor 1/8HP and coolant pump 1/8HP. All are single voltage 380/440v 3 phase and there is contactor/zero volt switchgear.
I know I need a 240v single phase in to a 415v 3 phase output invertor. Having talked with a well known Invertor supplier in Nottingham it seems I need to either wire the motors directly to there own invertor or use a particular type (described as MA5 plug & play) so the existing wiring and contactors can be used.
Can anyone tell me if this is correct as its an expensive option
 
3\ Does anyone have an easy way of cleaning out the coolant tank or is that a waste of effort?
Steve Taylor 214/04/2011 19:48:10
35 forum posts
6 photos
My apologies I have just found a small plate on the side of the feed gear box that has all the pick gears listed and the inch per minute rate, I have listed these if anyone needs them.
A B Inches per Minute
64 17 0.89
59 22 1.25
52 29 1.87
43 38 3.0
38 43 3.8
29 52 6.0
22 59 9.0
17 64 12.6
 
The missing ones are17, 34 & 38T.
Can anyone supply or make these gears
Where do I find a chart for feed speed referring to material and I suppose relating to cutter size and depth of cut
,14/04/2011 20:59:03
41 forum posts
1 photos
Hi Steve,
Trying to find someone to sell you these will be somewher between finding hens teeth and rocking horse manure. I found the only answer was to make them.
On my Harrison mill I fitted a 2hp single phase motor for the spindle (the mounting plate needed a few simple mods) and it was a siple task to get a local rewind company to find the star point of both the other motors so I could use a couple of cheap secondhand inverters. I used variable speed control for the table feed and just use the highest ratio gears and now have infinatly variable speed rate from max to almost zero. I found that on the slowest feed using the gears it was still a bit fast for some applications
The machine needed rewiring with new contactors/overloads but that was fairly simple too
 
Regards
Phil
Nick Hopwood15/04/2011 12:50:26
31 forum posts
Hi Steve
 
I have an AEG Denford mill with similar motors. I have connected the main wiring from the isolator switch to a converter (big blue box) and it works fine, mainly because the table feed and coolant pump only work when the main 2hp motor is running. This means there doesn't seem to be any problem with the lower start up current on the other two motors. Mine was also missing the feed gears, except the two already in the gearbox. I advertised on this site and got a full set.
 
Regards
Nick
Steve Taylor 216/04/2011 15:03:28
35 forum posts
6 photos
Progress
 
Thanks to Dennis Ribbons of www.dgrdesigns.co.uk/ I now have the 3 missing pick off gears on their way.
 
I decided the 3 phase solution offered by Drives Direct is the best one as I can effectively use the phase converter to power other 3 phase equipment in the workshop, which I couldnt if it was wired in directly. I have a Schaublin lathe with an old DC motor and controller that really needs changing and a Swiss 3 phase motor for a Hauser pivot burnishing machine.
 
Still unsure about the coolant tank, "Does anyone have an easy way of cleaning out the coolant tank or is that a waste of effort"
 
Thanks to everyones input so far.
Jon17/04/2011 15:47:29
1001 forum posts
49 photos
Think you would have been better off changing motor and coolant to single phase or going for a rotary convertor.
 
Think you may have same Teco MA7200 5.5hp as me they call it MA5, it borderline trips the contactors on M300 lathe with 3hp motor.
Was told after buying it needs wiring direct to the motor with soft start, but what use is that- none when needing full control of lathe functions. No help at all from said place in Notts about wiring 6 months on and was sold as plug and play, aftersales worse than useless.
 
The other thing is those digital inverters use 61p/hr against equivalent rotary at 31p/hr, so dont leave it running too long.
Only things in the digitals favour are compactness, no noise and using 4p/hr when not driving anything.
Rotary uses 13p/hr when not running anything and 31p/hr running 3hp motor.

Paul Clapham20/04/2011 19:17:09
avatar
19 forum posts
1 photos
Hi Steve I have the harrison mill and if you would like a copy of the owners hand book in pdf format let me have your e-mail address and I will send it to (FREE!!) also have details or where you can get the gears from.
Cheers Paul.
Raoul Coetzee20/05/2011 17:53:24
1 forum posts
Hi Steve,
I also have an old Harrison mill, took the motor out, had the rewinders bring out 220 volt three phase taps and used a 220v single phase to 220v three phase speed control unit.
I only feed the main motor and the table drive, the sump pump was removed and I use a sealed fountain pump single phase motor, also connected to one of the phases,
I now have soft start, variable speed control. With regards to the cleaning of the sump, it is a pain, I use a removable plastic container ,and my fountain pump is of course inside the container.
Hope it helps.
Raoul
Marcel Jolinon08/07/2011 21:27:50
27 forum posts
12 photos
Good evening all,
I am new on here, found the forum whilst looking for info.
I have just acquired a Harrison Vertical Mill. It is a nice machine although it was damaged.
 
The table slide feed screw had been clouted and the handle had sheared off. This is now repaired. My current problem is that I can't turn the gearbox. I have removed the side cover and all appears to be OK, ti will turn in neutral but I can't move the input shaft. I understand some of these machines were fitted with an electro-magnetic clutch but there is no obvious wiring into the gearbox. As I do not have a manual for this I am in the dark as regards operation.
 
Does anyone have a manual I can beg/buy a copy of, and has anyone any idea of where the clutch (that is if one is fitted) may be situated?
I am about to drop the belts, which is a bit of a pain, as I think it is all adjusted at the motor, which is buried in the cabinet.
Jon08/07/2011 22:17:41
1001 forum posts
49 photos
Not in a low gear is it?
alan frost08/07/2011 23:49:17
137 forum posts
3 photos
I vaguely seem to remember someone suggesting the best way to clean a coolant tank was to toss in an elfin pastry inspector , the death struggles usually being sufficient. Rgds.
Paul Clapham09/07/2011 09:11:45
avatar
19 forum posts
1 photos
Hi Marcel
Let me have your e-mail address I have a manual which I can let you have.
Regards Paul.
Marcel Jolinon10/07/2011 23:38:34
27 forum posts
12 photos
Jon,
No not in low gear. I have pulled the motor out of it today and there is a spindle brake on the back end. I have stripped this and got it spinning free, but cant find any means of releasing it when the motor is powered.
Having got it running free I put it back together and tested it, the motor spun up fine.
Put it all back together, tried it again, OK. Put belts on and the spindle started to turn, but slowly. Shut it straight down down , dropped the belts, and now the motor will not function, yet I can turn it by hand. It was not under load long enough to burn out.
I am running it off a static phase converter which powers the lathe OK,
Bit of a puzzle really. Need to check if the contactor is wired across the correct phases, but need to identify them. Need the wiring diagram for refrence, or it's all down to taking the control side apart to find out.
 
Peter Colman13/07/2011 10:58:19
1 forum posts
Hi
I too have the book somewhere which I would be happy to copy for you, I can cut the gears for you as well.
Peter
Chris Papadakis13/11/2016 20:19:13
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4 forum posts

Hi gents! Terribly sorry to resurrect this thread but I could use some info please!


My name is Chris and I live in Greece. Just registered here, due to the info I found on the Harrison 600 here! good stuff!


One of these has landed my way a few days ago. Its the vertical 600 miller and I am in love with it. I got 3 phase power and I am ready to go. Will be plugging it probably tomorrow.

My miller came with no tooling and no pick off gears (except whats in it, which I will find out tomorrow).

Sooo.... I could use any help either trying to locate the pick off gears and a manual I could REALLY use a manual please!

Again please accept my apologies for bringing this thread out of the closet.

Cheers!

Chris

John Stevenson13/11/2016 21:33:09
avatar
5068 forum posts
3 photos

The pick off gears are identical in size and pitch to Myford gears only they have a boss on them to make them longer and a smaller hole thru the centre so a simple top hatted boss pressed and lock tighted into an existing gear will do the job.

Simples.

Chris Papadakis13/11/2016 22:26:57
avatar
4 forum posts
Posted by John Stevenson on 13/11/2016 21:33:09:

The pick off gears are identical in size and pitch to Myford gears only they have a boss on them to make them longer and a smaller hole thru the centre so a simple top hatted boss pressed and lock tighted into an existing gear will do the job.

Simples.

That's great info right there mate! Thanks ever so much. I'll look up the necessary gears on ebay to check what I can come up with.

Any chance of a manual by the way please?

Again thanks ever so much. This is greatly appreciated,

Cheers!

Chris

Chris Papadakis17/11/2016 14:42:14
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4 forum posts

Hi again guys!

Anyone came up with a manual for me please? Preeeeetttty please? Like with sugar on top?

Cheers!

Chris

Muzzer17/11/2016 15:01:49
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2904 forum posts
448 photos
Posted by Jon on 17/04/2011 15:47:29:
 
The other thing is those digital inverters use 61p/hr against equivalent rotary at 31p/hr, so dont leave it running too long.
Rotary uses 13p/hr when not running anything and 31p/hr running 3hp motor.

I've no idea where you could possibly have got that idea from? Where's all that power going - a black hole? If a VFD has only half the efficiency of a rotary converter, that would make it something like 40% efficient or worse. Try 97-98% efficiency instead.

You need to check your figures!

Marcel Jolinon18/11/2016 11:28:06
27 forum posts
12 photos

Hi,

I have a manual for te harrison Mill. I can scan it and send it to you if you wish.

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