Member postings for elanman

Here's one I made earlier. It works very well and I have never seen another.

However in the pic of the OP and the link to the pins there are two good improvements I need to make. The thumbwheel will stop the jaws closing on your hand when a pin slips out and it looks as if the pins are held in with an O ring, meaning they are easy to change.

Cheers

John

Edited By elanman on 27/08/2023 16:48:34

Edited By elanman on 27/08/2023 16:51:12

Edited By elanman on 27/08/2023 16:55:07

The big advantage with screw loc cutters is that they cannot walk out of the collet and they should self tighten. The disadvantage now is that they are out of fashion compared to fifty years ago and so the selection of cutters one can buy is less. Tracy tools also sell the cutters as do other suppliers.

As the OP has eight collets I assume he has a full set, both imp and metric.

Edited By elanman on 22/06/2023 21:53:19

Edited By elanman on 22/06/2023 21:53:41

I used a carbide burr, a lot cheaper and also from APT.

I do hope so, 22 miles vs 251 miles to Leamington makes for a much better trip.

Cheers

John

Edited By elanman on 16/11/2022 15:20:31

You need to be careful. There are at least 2 specs for the tolerance of the O/D size. The wider limit stuff is a lot cheaper, but if that's not an issue then it can save some £'s.

Cheers

John

DTI, Indicator or dial indicator????

Where I was an apprentice they were all just known as a "clock". LoL.

Cheers

John.

Over twenty years ago now but I used Diamant Boart, they seem to have moved to Leeds but may be worth a call. Another firm I looked at at that time was Major diamond supplies who are still going and in Northampton. They do make core bits.

Cheers

John

Edited By elanman on 18/02/2022 17:03:35

Way back when I was an apprentice we would use round blanks for small (say below 3/8in dia) boring tools and I still do. If you start with a round piece you've got less metal to remove to make the tool.

I would not normally use a round blank for external turning. One of the times I would use such a tool is the using up of a broken end mill to make a special (one off) tool.

Chris, no I would not grind a flat, just position by eye. Hold the tool in a V block or split square holder.

Cheers

John

Edited By elanman on 07/01/2022 19:34:19

I have a 2 axis on my lathe and a 3 axis on my mill, I would not be without either of them.

On a lathe to get the best out of it you do need one with tool tables on and a good QCTP with a fair few tool holders. That way you can change tools, tell the DRO which tool you are using and away you go, once it's all setup. Very useful if you are working on a job that you need ten of.

Others have said what's good to have on a mill.

Cheers

John

Edited By elanman on 22/12/2021 14:12:22

The first thing I'd do would be to measure how much torque is required to move it with the aid of a lever and spring balance. Then I'd look at what options there are to achive this torque. What size gear box might be needed in order to use a smaller motor? Then it might depend on how much you want to spend.

Cheers

John

I have shortened a glass scale, but not a chronos one so you may need to adapt the method.

On the end that you are going to chop off, remove the end piece. Slide the read head to the other end. Fill the scale with cotton wool or tissue to try and stop grinding dust into the read head. Slide this packing upto the read head making sure that it's past the cut point. Mark the cut point on the outside case of the scale. I used an angle grinder with a 1mm thick cutting disc. Cut it so that the glass is supported by the metal in the direction that you are going to cut. Then go for it. Take it easy and do not force it though.

Just stick the end piece back on with sealer.

Best of luck.

Cheers

John

Edit , I see some has typed faster than me and posted a better desciption with pics.

Edited By elanman on 19/09/2021 08:45:15

Are some of the nuts made with the one size smaller hex bar to make the nuts look more in scale. So a 4BA nut would be made with a 5BA hex size. Kennions still sell these and also bolts.

Cheers

John

Are some of the nuts made with the one size smaller hex bar to make the nuts look more in scale. So a 4BA nut would be made with a 5BA hex size. Kennions still sell these and also bolts.

Cheers

John

Another possible option is 1/4 NPT thread. This is .54in O/D * 18 TPI.

Cheers

John

Yes they are DW castings, I think a Mk2 version.

PM me if you really need to know what's what and I can look it up in the build manual.

Cheers

John

Edited By elanman on 27/03/2021 10:45:12

Hi Len,

On my M300 it's item 24 in the parts manual but has a different pt no to your suggestion. It is held in place with two small screws that screw into a couple of tapped holes in the bottom of the headstock casting.

Cheers

John

Edited By elanman on 06/09/2020 13:30:52

Well I would temper to Mid to dark straw. Sorry I'm old school I don't know what temperature that is. Others may have different ideas.

Cheers

John

If it's for a Rudge-Whitworth centre lock fitting then they have imperial threads. 8TPI. Oviously if you are going to make everything then the thread can be of your choosing.

Cheers

John

Youra,

I did not use any calculations. I also have a Dore Westbury and so copied the idea from that. I made two as the quill is a lot larger than the DW. I do know that I made the springs twice as the first ones were not strong enough.

Sorry I'm not more help but it was a long time ago now.

Cheers

John

Youra,

Thanks for the link, I've not seen those before.

Cheers

John