Harrison Universal Milling Machine Feed Gears & 3Phase

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Harrison Universal Milling Machine Feed Gears & 3Phase

This topic has 24 replies, 15 voices, and was last updated 25 February 2025 at 11:47 by MARK RIGG.

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14 April 2011 at 18:48 #66902
Steve Taylor 2
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@stevetaylor2
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?
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14 April 2011 at 18:48 #16640
Steve Taylor 2
Participant
@stevetaylor2
14 April 2011 at 19:48 #66905
Steve Taylor 2
Participant
@stevetaylor2
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 April 2011 at 20:59 #66909
,
Participant
@nousername29627
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
15 April 2011 at 12:50 #66921
Nick Hopwood
Participant
@nickhopwood71702
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
16 April 2011 at 15:03 #66973
Steve Taylor 2
Participant
@stevetaylor2
Progress

Thanks to Dennis Ribbons of http://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.
17 April 2011 at 15:47 #66999
Jon
Participant
@jon
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.
20 April 2011 at 19:17 #67234
Paul Clapham
Participant
@paulclapham12886
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.
20 May 2011 at 17:53 #68923
Raoul Coetzee
Participant
@raoulcoetzee22886
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
8 July 2011 at 21:27 #71542
Marcel Jolinon
Participant
@marceljolinon76204
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.
8 July 2011 at 22:17 #71548
Jon
Participant
@jon
Not in a low gear is it?
8 July 2011 at 23:49 #71554
alan frost
Participant
@alanfrost17805
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.
9 July 2011 at 09:11 #71560
Paul Clapham
Participant
@paulclapham12886
Hi Marcel

Let me have your e-mail address I have a manual which I can let you have.

Regards Paul.
10 July 2011 at 23:38 #71651
Marcel Jolinon
Participant
@marceljolinon76204
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.
13 July 2011 at 10:58 #71737
Peter Colman
Participant
@petercolman16836
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
13 November 2016 at 20:19 #266423
Chris Papadakis
Participant
@chrispapadakis39789
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
13 November 2016 at 21:33 #266434
John Stevenson 1
Participant
@johnstevenson1
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.
13 November 2016 at 22:26 #266438
Chris Papadakis
Participant
@chrispapadakis39789
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
17 November 2016 at 14:42 #266983
Chris Papadakis
Participant
@chrispapadakis39789
Hi again guys!

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

Cheers!

Chris
17 November 2016 at 15:01 #266988
Muzzer
Participant
@muzzer
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!
18 November 2016 at 11:28 #267122
Marcel Jolinon
Participant
@marceljolinon76204
Hi,

I have a manual for te harrison Mill. I can scan it and send it to you if you wish.
18 November 2016 at 15:06 #267156
Chris Papadakis
Participant
@chrispapadakis39789
Posted by Marcel Jolinon on 18/11/2016 11:28:06:

Hi,

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

Hi Marcel!

YES PLEASE!!!! I'd really appreciate it buddy, thanks very much!

Let me pm you my email address.

Again, thanks ever so much!

Cheers!

Chris
2 April 2017 at 20:36 #291857
David Kenyon 1
Participant
@davidkenyon1
Hi all,

Sorry to resurrect this, but I am after a little help if possible, please.

I have a Harrison 600 Vertical Mill and it seems to work well (to my inexperienced eye). I also have a manual but the information isn't detailed.

Is there a way to lock the Y-axis when taking cuts? I've found that it occasionally drifts slightly when taking heavy cuts and motoring along the X-axis.

Many thanks,

Dave
30 March 2018 at 16:14 #348144
Andy Pugh
Participant
@andypugh44463
Too late, but yes, there is a saddle lock between the two halves of the retaining blocks under the slide. One nut on each side.

I recently rebuilt my vertical head and took photos / documented the process.

http://bodgesoc.blogspot.co.uk/2018/03/harrisonvertical.html

Edited By Andy Pugh on 30/03/2018 16:19:41
25 February 2025 at 11:47 #785676
MARK RIGG
Participant
@markrigg57943
Hello . I see you managed to obtain some gears from dgrdesigns / Dennis Ribbons .

You you still have any contact details for this company / Ribbons ?

The google contact doesn`t appear to work .

Any help here would be appreciated .

MARK RIGG – ( markhenry.rigg@btinternet.com )
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