Member postings for Dave Halford

Evening all, I've had a Boxford AUD for a while now, but very much still a beginner. It originally came with a 4 jaw and 3 jaw Pratt and Bernard. The 3 jaw has only inside jaws which has caused issues with small jobs. I've looked into obtaining outside jaws but was told that as it was a sixties model I wouldn't be able to get a set. I've been given a unused 3 jaw with both inside and outside jaws but the back plate is different to the Pratt item.

Has anyone heard of YAMA? Is it worth making a back plate for this although I'd need plenty of hand holding and I'm not sure I've got the gear to do it, but obviously it would be good learning experience. I tried buying an off the shelf plate but RDG hadn't heard of them and I couldn't find any info on the net so don’t want to go to any trouble and expense unless it’s worth it.

Regards Si

The machine is a Samsung split AC 1500W power in and 5400W cooling out single phase 220V. It's ancient, a non inverter, and appears to have 4 good rubber feet although one of them is floating.

I guess I could look for some superior rubber feet ...

Cheers, Colin

Thanks for the replies. The plot thickens, when it sold, the first message from Ebay gave an address, which is where I sent it. I got a second message, from ebay, same buyer but a different address, but I didn't notice. Something rotten in the state of Denmark? Waiting a reply from buyer, have asked him to nip round to other address, as it's only a mile away. May well be just a silly error down the line

Thanks all for your input.

I think its clear now 50mm of concrete on a compliant base is quite risky, and especially so with electrical elements embedded in it. I will have to consider something substantially thicker, probably 100mm min. In a house this wouldn't be helpful as it just slows the warm-up time. But in the workshop it would only be a background heat just to keep the room a little above ambient, so perhaps 100mm is not a problem.

I had planned plenty of insulation and the calculations suggest it wouldn't take much energy to maintain a reasonable differential with the outside ambient. I already have solar panels on the house and they generate far more than I can use, so this would heat the workshop most days, and for free.

The real problem now is that the planning people want to reject the whole concept due to 'green belt' concerns. So all workshop design activities are on hold until this is sorted, ....if it can be sorted.

Gerry

The foundries I've used unless requested otherwise use a sand called Petrobond which takes very fine detail. Here's a wooden pattern I made and the casting that resulted.

I did paint the pattern, but the actual finish was as you see here. The resultant casting:

The Capital letters have the squared edge from the pattern and the script letters are rounded as per the pattern. If you CNC'd the letters on your pattern with a consistent draft you would get something cleaner and crisper than this.

Edited By Stueeee on 11/02/2022 16:09:06

Questioning of others involved in the rebuild suggest that the block faces MAY have been skimmed. Things like liner protusion, valve and injector height Etc were not understood by some of thoses involved in said rebuild.

Where can I purchase a new magic wand - I may need it ! Noel.

Hi folks

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I have obtained a mix of nuts and cones, and I don't know what I have.

This sort of question has come up before but it didn't help me in the short term, although I hope to be able to find the reference when I can get to the club and look at the old magazines.

thread link

Thanks for the help.

Rog

The two different trunk thingies bore sizes are interesting ? Does this follow full size practice ?

Thanks

bill

Edited By br on 06/02/2022 14:31:59

Hi all,

Looing to buy a milling table, but I need a good one, as when moved into position, for drilling several holes over and over in 40mm x 8m bar, and other metals for my wrought iron firm, not sure I can put a link in to our Web-Site ??? I dont want any movement whatever, or when move into position, I would like to lock it into position. I have a very good big pillar drill I will fix it to, and will fix my swivel vice on top of this.

I seen one on EBay, called; Multifunction working milling machine X Y cross worktable for bench drill, its what I "want", £269, BUT, cant see the name on this.

Hoping for a few ideas on which to buy, would like to buy one in the next two days, as have a very big job on.

Thank you all in advance.

Wayne

Unless this machine was switched only at the plug socket, to which it was likely connected, there will be a switch between the mains and the motor - so likely the machine is connected to an earth in there and therefore protected.

The only part not earthed would be the motor (due to that insulated carrier) so only the motor will not be earthed. Not a safe situation, even if the rest of the machine is earthed. Relying on RCDs, etc is not a good way to avoid a 240V electrocution is not too good where an initial shock could cause contact with revolving machinery.

I'm an electrical ignoramus but it occurs to me that the reason for the additional earth was the rubber resilient mount of the motor preventing the standard earth from earthing the whole machine?

I have the Newton Tesla package on my S7 and wonder what effect this has on the issue you have identified.

What does the supplied installation document say?

I'm an electrical ignoramus but it occurs to me that the reason for the additional earth was the rubber resilient mount of the motor preventing the standard earth from earthing the whole machine?

I have the Newton Tesla package on my S7 and wonder what effect this has on the issue you have identified.

Yes you are correct, that is also one of the reasons I feel making a new hub from a block of cast iron.