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removing the head/table from a meddings MF4?

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Steven Vine06/01/2017 17:23:16
340 forum posts
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Mine is 2mt. No oil came out at all. I'm pretty sure it is greased. 19mm and 3/4AF spanner fits the head bolt.

I've been pondering on some mechanism to raise and lower the table (motorised threaded rod, modified bottle jack, modified scissor jack etc). Let us know what you come up with whenever you get round to it.

Steve

Edited By Steven Vine on 06/01/2017 17:34:47

richardandtracy06/01/2017 17:56:34
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943 forum posts
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Thought I had an MF 4, but it's all curvy at the top. Also the pillar was solid steel, I was amazed to see this. 6ft at 3" diameter is a fair weight to move. And the head was barely light enough to lift from knees to waist. Had to build a platform so my waist was at the top of the pillar for the last lift of four up to pillar top height.

Regards

Richard.

Mike Poole06/01/2017 19:01:16
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3299 forum posts
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The MF4 Pacera was all curvy but the MF4 mk3 was all squared off and metric.

Mike

Nigel McBurney 106/01/2017 19:45:15
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999 forum posts
3 photos

A person specialised in machine tool repair and also sold a few machines told me that he had repaired lots of meddings drills which had the hi/low ratio gearbox with its tufnol gears loosing their teeth ,the cause of the gear breakage was mostly due to operators attempting to change speed before the motor stops. On my drill two of the push fit knobs on the levers were missing,the bore of knobs has a corrugated steel springy clip which is supposed to retain the knobs, one of those silly cost reducing ideas for assemblies which do away with grubs crews or pins,to save drilling and tapping, I made aluminium knobs secured with skt grub screws. Will have to check tomorrow if my drill is MF 5 , with that 3mt spindle it really is a good drill,though I prefer my 45 year old Fobco for very small drills.One thing to watch if you have not used a machine with decent motor and large 2mt drills ,they have a lot of power and can spin the work ,vice and all ,if there is a jam up, until you get familiar with it bolt the work or vice to the table when using drills or reamers 5/8 dia and above.

Steven Vine06/01/2017 20:09:54
340 forum posts
30 photos
Posted by Nigel McBurney 1 on 06/01/2017 19:45:15:

.One thing to watch if you have not used a machine with decent motor and large 2mt drills ,they have a lot of power and can spin the work ,vice and all ,if there is a jam up, until you get familiar with it bolt the work or vice to the table when using drills or reamers 5/8 dia and above.

+1 on that. Once it goes, there is no way you can stop it! Been there and learned the hard way.

Steve

Toby06/01/2017 20:17:01
117 forum posts
17 photos

Thanks Nigel and Steve for that warning. At the moment I am probably limited by the size of my drills but no doubt that will change

Mike Poole06/01/2017 21:02:57
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Moderator
3299 forum posts
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It is always worth having a foot stop on a drill because the day always comes when you are in a hurry and don't clamp the job, if you manage to hang on you can hope the overload will trip if you have one. The standard Meddings setup did not have an NVR or motor overload it is probably a good idea to fit a proper motor starter with a conveniently positioned estop (note to self: get this sorted out). Meddings did offer an NVR overload and kickstop as an option but it was only mandatory for school use, grown ups were allowed to choose.

Mike

Toby07/01/2017 09:25:02
117 forum posts
17 photos

This one will be going on an inverter/vfd so that will provide motor protection and NVR. It does have an E stop switch but its mounted right at the back where there is no way you would get to it in an emergency! Plus I don't think is a good idea having a e-stop between the inverter and motor.

I'll probably do what I did with my lathe, completely bypass the standard switchgear and wire the inverter direct to the motor. The inverter controls giving all the necessary E stop etc.

Toby09/01/2017 19:06:13
117 forum posts
17 photos

An update. The stuff has been collected and loading the drill was not as bad as I feared. I had a mate with me and we lowered the table and head to the bottom so the CofG was low and then walked it onto a sack truck. Getting it into my van was a bit more fun but we ended up just raising the head and table again then tilted it until it was on its side, half in the van, then lifted the bottom and shuffled it fully in.

In fact the biggest problem was that we had taken my mates engine crane just in case we needed it and that just got in the way!

So thanks for all the help and advice, it certainly made it a lot easier!

Oh, and when I said we "collected the stuff" that included a meddings MB10 and a AJH belt sander. I was just able to lift the MB10 into my van on my own but it is a heavy little thing!

Next job is to check everything out, wire in an inverter and hope they all run! So far all I have done is check the motor on the MF4 can be 240V delta and look at how it is wired at the moment. It looks like it has a NVR in the back of the on/off switch wired back to a E-stop, plus what I assume (not tested it yet) is a reversing switch. At least electrics don't scare me

Lastly, a couple of pics of the new toys in my very untidy garage.....

Edited By Toby on 09/01/2017 19:11:36

Mike Poole09/01/2017 19:38:23
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3299 forum posts
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Hi Toby, looks a excellent collection of machines, nice to get an unmarked table, so many seem to have been drilled by morons, must have come from a good home. The MB 10 is a heavy little beast, mine put a dent in my new bench top when it got the better of me.

Mike

Toby09/01/2017 20:04:42
117 forum posts
17 photos

yes, the MF4 is what I was after and so far looks like it is very good condition, there are a few very minor drill marks on the table but it is much much better than any others I have seen for sale recently. The only strange thing is the depth stop, it is a double nut type rather than the clamp type shown in all the pictures I have seen. I don't know if that is a meddings change but I suspect it is a modification. Anyway, the real test will be when I get it running!

The MB10 looks ok except the big setscrew holding (I assume) the rear pulley looks to be cross threaded. I haven't removed it to see what the damage is though. Apart from that it still turns smoothly although I have let to turn it on. The biggest problems is that I don't think I have much use for a drill with minimum speed of 3000rpm but I am sure it will come in useful one day. I just could not resist it for £30

The belt sander is a bit of an odd one, I sort of fancied one before but don't really have the space. But this one just happened to be in the same lot as the MF4 so I had no choice to take it. All I know so far is that the sanding belt looks usable (if maybe a bit coarse) and the drive belt is in one piece. I think something is wrapped round the motor shaft though (maybe bits of an old belt?) and on the front it says 2HP 3 phase, 440V. The spare inverter I have is 1.5HP so I shall have to see if it is man enough for the job (hopefully yes with a soft start).

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