Member postings for Putney man

I am looking at a BCA jig borer, it has a 2 speed 720 / 1440 motor. It is 3 phase but only states 380/420 volts, and 2 power outputs , .37/.5HP. It is a delta wire, and the power switched either apply voltage to the corners of the delta, or, to the middle of the delta triangle. Now I am wondering if its 400 volts only, and a re-motor job. Anyone know?

I have a Downham Jig Borer - and it has a set of CC18 collets, and I am looking to replace some of these. I cannot find any - are there any alternatives?

I have aquired a Myford 254s. Looking at getting a Taper turning attachment, Myford supply the series 7 with holes already drilled to accept a taper turing attachment. Anyone happen to know it the holes are the same on the 254s?

I understand that the rpm is half / double, but are there any other issue plus or minus in choosing a 2 pole or a 4 pole motor for VFD control - I can adjust the spindle speed by the pulley sizes.

This is great - exactly what I needed. Lathes . co site sugests the base is heavy guage steel - not cast iron, in which case it sounds like it could be manhandled by a couple of large blokes, not as heavy as a cast iron base. You say welded - I presume that means it is sheet steel - could you confirm? - this info is exactly what I need, I think, I could - if I took the door off, get it down sideways, assuming its not cast iron an weighing 300ibs

Regards

Adam

martin, those measurements are in the manual and not what I'm after - that measurment refers to the base of the main machine, if it were bench mounted - and not the cast iron stand it sits on. - its that measurment I'm after. I think it would need a kind person who has one of these to get their tape measure out - I have googled away without sucess!

Anyone have the dimensions of the base - without the swarf tray - (which will be coming off) - considering one of these (a 2B), but I need to move it into a cellar and want to confirm the max dimensions - after the swarf tray is removed. I think the top just unbolts from the base. - I have got the manual, but, infuriatingly, it doesn't have the actual measurments of the base on its own. I assume it was never deemed relevant when these were going into a factory.

Are you sure the base alone would weighing half the total - eg 350kg? I'm not saying its wrong, just a bit surprising, but this is the informaiton I am after - if its true, even splitting it wouldn't get the parts down to my managable max - which is 250kg - so this gets crossed off my list - pitty its a very compact mill.

The manual says net weight 700kg. I need to reduce that, ideally to not more than 250 kg chunks. Any owners got an idea if that's possible. If I take the knee and table off, and the over arm, I assume the base separates from the top, although I'd need to disconnect the spindle drive belts. I'm thinking doing this may achieve the objective. Any thoughts on this?

I read that, and, (I'm a beginner here), does this mean that its a camlock d1-3 nose (in terms of taper and size, BUT, instead of the cams to quick attach / release the chucks - you need to get the spanner out? - Also - in practical terms - I haven't got a google hit on a B.S.4442-A3 compatible faceplate or chuck, what should I be searching for? - Sorry to be a bit dense here.....

Just bought a 254s (not delivered yet), it has the 3 bolt (non camlock) spindle nose fitting, what is the actual specification of this - as I need to purchase some chucks and a faceplate.

Did you get a larger capacity phase converter from direct drives? I am in a similar position in that I have 2 2 speed motors - 400v 3 phase and am looking at DirectDrives solution - I think you would need the 7.5 hp version to start the motor. The lathes are a Hardinge KL1 and a Boley 5lz. Before I go ahead It would be good to see if anyone else has got their solution to work - and, if there are any special connection / safety requirements.

Its 400v 3 phase - a UK spec motor. I believe i can run it off a single 240 - 440 3 phase digital inverter - but they are £1000. Its still cheaper than me getting 3 phase mains installed.

I have also aquired a Hardinge - same problem. Are you pleased with the 5LZ? Have you had any issues with the reverse gear?

Thanks - this is really helpful. BTW do you have mains 3 phase to your 2 speed motor, or have you rigged up an inverter or converter to power it up?

Edited By Putney man on 18/04/2012 12:13:28

Edited By Putney man on 18/04/2012 12:13:49

I have a Boley 5lz - actually its still at Bede tools who I bought it off, but I hope to move it soon. The collet size is described as "a 12 size 4", I cannot actually find if that is still made - anyone able to shed any light on this - is there an alternative standard?