Member postings for David Colwill

You can find them on youtube!

Dolphin is quite affordable.

Regards.

David.

Mostly the advice is avoid sets. They contain tools that you don't need.

Instead pick an insert type. CCMT060204 or DCMT070204 (the triangular TCMT? have their fans as well) and get the basic tool to suit it SCLCR1010H06 or SDJCR1010H07then buy other holders to suitother applications.

Another good insert type is scmt09t304 with this holder SSSCR1212H09. This can face and chamfer in one tool and can turn but not to a shoulder.

For the tools I use cheap Chinese ones and they are fine. The inserts are another story.

I'm sure others will jump in here.

David

Edited By David Colwill on 13/07/2022 22:31:08

My theory (and it is only a theory) is that swarf from the thread cutting gets dragged back into the threads, with this result. Some dies are more prone than others with new cheaper offerings seeming to be the worst offenders.

To help overcome this I frequently blow the swarf away and avoid using thick cutting oils that can keep the detritus hanging around. Be extra careful when unscrewing the die afterwards.

Again this is only my theory and I am interested to hear the thoughts of others, having had my fair share of this scourge.

Regards,

David.

Edited By David Colwill on 05/06/2022 10:54:07

Hi,

I haven't played around with it but have seen Clickspring on Youtube make cutting tools by hardening and tempering it,

David.

I see that it is back on eBay for £700.00

David.

I'm not sure that this is a case of buyer beware, more a case of buyer check what you have bought!

In your position I would be reasonably confident of getting my money back. As others have pointed out use Paypal as a method of payment, they will immediately pull the money back if there is any problem and are pretty good at getting to the bottom of things.

As far as I am concerned this is a great illustration of your consumer rights in action!

Regards.

David.

He has started to release a new series of the secret life of components on his Youtube channel.

Enjoy.

Regards.

David.

I have ordered some which should be here in 3 to 5 days.

I will PM you when it arrives.

Regards.

David.

I keep other Castrol oils in my eBay shop ( I have AWS 68 ) but not this. I will ring my suppliers and see if I can get some as it may be worth stocking.

Regards.

David.

I have made precision ground stones and find them very useful. However for gauge blocks I find a small ruby stone (very cheap off ebay) seems to work very well. It is very hard, seems to be very flat and does not scratch the surface of the gauge block. As to the blocks you have, even worn they are very useful as packing and for other setups. I always pick up odd junk ones when I see them.

Regards.

David.

The toolposts listed look to be Dickson clones. Whilst they work well, making extra holders is not straight forward.

I use an Aloris clone Arc Euro model 200 or 222. These take 16mm tooling and will fit your lathe. The holders are (I believe ) cheaper and certainly easier to make.

Whilst I agree that QCTP's are not always quicker to go from tool to tool, they do make life easier if using a DRO (and you have enough holders).

I wouldn't be without mine!

Regards.

David.

Sadly it isn't just RM, they are all suffering from delays. One thing in RM's favour, they will eventually deliver. Hermes / Inpost just throw it in the bin!

Regards.

David.

Edited By David Colwill on 11/01/2022 18:03:37

I have its very much cheaper cousin and am surprised at how good it is. There is a ton of youtube videos out there that go quite deep into the ins and outs of them.

Regards.

David.

How about this.

Another example of over enthusiastic traffic calming.

Can you give us a rough idea of where you are?

David.

I believe that there is a difference between the British and American built machines. The British Machines have a 4 degree taper as opposed to the 3 degree 59 minute 30 second of the American machines.

Not a problem if you are working to the taper on your machine.

David.

Indeed it is.

That was this mornings job, spurred on by this thread.

David.

I have never seen a chuck on a Hardinge backplate in good condition. Like Pete above I have the older HLV. This had a chuck with it that was worn well past the dangerous to use stage. The taper mount was built into the chuck but I was able to machine away enough to allow me to mount a Chinese 100mm 3 jaw chuck which works okay for the odd time I need it.

David.