Member postings for Andrew Tinsley

Come Andrew,

You do Tom Sheppard an injustice, 19th century, bamboo usage? It goes back millennia in construction. Predates steam engines by a few thousand years.

Andrew.

Edited By Andrew Tinsley on 09/03/2021 10:27:22

Edited By Andrew Tinsley on 09/03/2021 10:28:08

Hello Paul,

Unfortunately it doesn't work out for  the Herbert drill. It looks as though I need to make a new triple motor pulley at twice the existing diameters. There is plenty of room to get this in the existing set up. Which makes me think this was the original intention, as otherwise the pulley guard could have been made much slimmer for the existing motor pulley

Thanks,

Andrew

Edited By Andrew Tinsley on 06/03/2021 21:26:43

Hello Paul,

That did occur to me! I have just measured up the pulley diameters and was going to work out the speeds if one did just that. I will report back.

Thanks,

Andrew.

Hello again,

I have converted a good number of motors from fixed star to delta by digging out the star point. This motor is very specific to the drill. Not just any motor, but one with a massive integral mounting arm. I want to keep the motor as it is original to the drill. If I mess up digging out the star point then to keep originality, it is a rewind job (to delta) and that isn't cheap!

Show me an Invertek inverter that has single phase in at 240 v and 3 phase out at 440V for £95 and I will buy it. You must know such inverters cost an arm and a leg!!!!!!!!! The only cost effective inverter at this spec, will be a Chinese one! I don't buy Chinese inverters but stick to European ones, but in this case I will give it a try, cheaper than a rewind.

Andrew.

Please ignore my comments about the motor being wired in Delta! A case of brain fade! It is connected in star, goodness knows what I was thinking of when I said it must be connected in delta!

I don't fancy digging to find the star point on this one! If I mess up the motor then I have a fair bit of work required to get a new motor in there. it is either a rewind to get it connected in Delta, with modern insulation or a cheapie 440 volt inverter. I swore I would never buy a Chinese inverter, but maybe this is a worthwhile occasion!

Thanks,

Andrew.

I have just started renovating this drill. It isn't the common high speed bench drill that one normally finds, if you google the above title. I believe that this one is an earlier model, probably pre war or wartime manufacture. The main spindle is supported on a vertical sliding surface and fastened there while the quill can be used in the normal manner via an adjustable lever. The setup is very similar to the much more common Pollard drills

Now the problem is this. It has a notice listing its speeds. It has 6 speeds ranging from 2350 rpm to 12,000 rpm. Lifting the belt cover reveals a block of 3 flat pulleys on the motor with equivalent pulleys on the main spindle, there is a very thin, wide belt transmitting the power. It still has its original massive motor which is a 1/3 hp, 2880 rpm three phase. The motor is specific to this drill and a massive mounting arm is integral with one of the motors end covers.

So my query is how does one get 6 speeds with this set up? There appears to be no reduction gear box on the drill, if there is, then it is mighty small and no lever to change gear! I was expecting a 2 speed, three phase motor, such as a Dahlander. The rating plate shows the current to be 0.6 amp at 400 / 440 volts. There are only 3 wires going into the motor, which rings alarm bells. I would surmise that it is wired in delta as there is no sign of a neutral, but then the motor is stated to be 400 / 440 volts NOT 240 volt 3 phase as I would expect with delta connection.

There isn't a terminal cover plate on the motor, the three wires just go through a grommet on the motor casing. Next move will be to dismantle the motor and see what is there. Not easy, as I can barely pick it up!

Does anyone know how you get 6 speeds out of this oddball?

Regards,

Andrew.

Edited By Andrew Tinsley on 06/03/2021 15:04:40

If Noel doesn't take it, then my shaper could use it. Don't mind paying for a courier and a donation!

Regards,

Andrew.

Late ML 10 s and Speed 10s use grease on those bearings if I remember correctly. A grease gun should work,

Andrew.

Ah! That reminds me that gold plated pins on a 13 amp socket, definitely improve the audio from good analogue audio amplifiers!

Andrew.

Edited By Andrew Tinsley on 26/02/2021 20:16:09

Piston valves are smaller diameter than the pistons themselves, thus are more difficult to make and remain steam tight. I have made both piston valves and slide valves and I know which are the easiest to make! By all means use piston valves if that is your fancy, but be prepared for more servicing to keep them tight.

Andrew.

Simple answer is that slide valves do not need very high precision to stay steam tight, Piston valves on the other hand do need high precision to prevent steam leakage. Piston valves are forced onto their seats by steam pressure. Piston valves rely on excellent fits to prevent leakage.

Andrew.

Certainly Beeston Myford said that you cannot regrind the bed of an ML10 However it can be done and I have seen one example to prove it. It does take more time to adjust other bits and pieces, but quite do able.

Andrew.

I agree with Andrew Johnston.

Andrew.

Guy Lautard's Bedside readers are a good case in point. They are soft covered A4 size, I purchased all the different ones for a total of about £30. I was horrified when I looked at Ebay and booksellers. They were asking well over £100 each! For once I managed to get a bargain. Why Guy doesn't have another print run, I know not, but he could manage a tidy profit if he did.

Andrew.

Talk about doing things the hard way! I always use ME taps and dies for making my steam fittings. I have NEVER had any come loose or heard of anyone else having that problem!

Andrew.

I had a similar problem with my next door neighbours supply. There isn't a water supply company stop cock!! His supply tap under the sink, wouldn't turn off, so he was in trouble when taps needed changing. I simply froze the old seized open stop cock and cut into the pipe above it and installed a second stop cock.

I can confirm that the freezing aerosols and insulated jackets work a treat. Gives you ample time to install a fresh stop cock.

Andrew.

Hello Howard,

I could not agree more. I revamped an old 918 lathe for a disabled friend. The 918s are well known for their lack of rigidity in the tooling area. So I made a Gibralter style post for when some accurate turning was required, Made a huge difference!

Andrew.

SOD, I DO have a great deal of difficulty in reading the white lettering on a black background. The longer I read the worse it gets, until I start to get a headache. I do a considerable amount of reading and have never had eye fatigue in this way. My usual book reading sessions are around 2 to 3 hours

Seriously I would have to give up the forum if that is going to happen The current format of black on a grey background is ideal, it also gets away from the complaint of being "too bright"

Andrew.

Just taken a look at the star gazers lounge. I find it extremely difficult to read. What idiot uses white letters on a black background?

This is the sort of idiocy that puts people off.

Andrew

I have both 4 way tool posts and QCP holders. Both Myford products. I find the 4 way tool post to be more rigid than the QCTPs. I have never heard anyone else express this opinion, so is it just me, or is it factual?

Andrew.