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Member postings for Douglas Johnston

Here is a list of all the postings Douglas Johnston has made in our forums. Click on a thread name to jump to the thread.

Thread: Tool post for Myford ML10 lathe
07/02/2020 10:22:25

If using a quick change toolholder on an ML10/Speed 10 the tool shanks have to be around 8mm high to fit for centre height.

I agree with Steviegtr about ditching the HSS route. Get some of the polished sharp carbide inserts designed for aluminium and use them for everything and you won't go far wrong. HSS has its uses but if I was just starting out now I would not make life more difficult than it needs to be by grinding my tools from HSS blanks.


Thread: Delays in Shipping from China
07/02/2020 10:06:00

The postman has just delivered a package from Hong Kong which has not been delayed, so perhaps they are better off than mainland China with regard to delays.

I think we need to be very considerate with Chinese traders, the situation must be very fearsome with the virus showing little sign of tailing off.


Thread: Emcomat 7
03/02/2020 13:55:57

Dave has summed up the situation rather well I feel, and in a way I will have a similar situation at a local auction tomorrow. There is a rather nice small unimat lathe in the auction and I rather fell in love with it at the viewing. Do I really need it, will it do anything my current lathe can't, is there a space for it in the workshop? All the answers are in the negative, but none of that will stop me bidding for it. Sometimes the heart should rule the head so I might just get carried away at the auction.


Thread: How do I change the "default" lever angle on my Verdict DTI?
02/02/2020 13:22:37

I have a couple of these indicators and I thought for years that one of them could not be adjusted and just had a fixed angle. It turned out that it was just really stiff and I was never brave enough to give it a good push. Perhaps it just needs a little more brute force, but it does take a leap of faith to manhandle delicate instruments.


Thread: Ink jet printer woes
30/01/2020 09:38:59

After many years of dodgy inkjets I also switched to mono laser and would never go back to an inkjet. I thought I would miss colour printing but apart from a few odd occasions it has not been a real disadvantage. My local library has a colour laser for public use so that is handy for the odd time I need colour. The toner cartridges are expensive but last for years with minimum use. When my last cartridge was empty I found I could buy a new printer at a sale for less than the price of a replacement cartridge.


Thread: Home made T&C jig
29/01/2020 13:59:46

I was recently needing a device to produce a fine feed for a grinding set up and had a look at a cheap way of providing an accurate feed. A look on ebay provided a micrometer head with a rounded spindle for about £5 from China. I have bought one but may have to wait some time for it if air transport out of China is suspended during the current health crisis.


Thread: What geen grinding wheels for tools
23/01/2020 17:40:06

I would not bother with a green wheel for carbide, diamond wheels work very well, are much safer, and don't cost a great deal. I have a couple of green wheels but have not used them for years and don't expect I will ever use them again.


Thread: 4x6 bandsaw
18/01/2020 15:55:00

The good old 6 by 4 bandsaw is a great bit of kit when it works. I have had one for a long long time and they can be a bit temperamental at times. It usually comes down to keeping the blade tension up and adjusting the top wheel so that the blade stays against the flange of the wheel. As mentioned above there are lots of youtube videos and there have been some articles in MEW over the years. A decent blade also helps, I am not sure that the Screwfix blades are the best quality.


Thread: Chinese DRO opinions
15/01/2020 17:54:52
Posted by Brian H on 15/01/2020 17:40:18:

My mill DRO was supplied by M-DRO and looking at the items it is clear that it is a Chinese made item, so it must have been sent from China!


That's true but a bulk supply to the likes of M-DRO is a different matter to sending out a single unit to a customer.


15/01/2020 17:31:48

My concern about buying this kind of thing from China would be the quality of the packaging. The scales are quite fragile and it is a long way from China. I often buy stuff from China and the packaging is seldom good. If you get a broken scale it might be a hassle getting a replacement.


Thread: To use chuck or collets
10/01/2020 15:17:41

The real pain is chuck changing. If you have the collet chuck fitted, chances are you need the 3 or 4 jaw or vice versa. There is no decent answer to this problem apart from muttering some favourite oath and getting on with changing the chuck. The collet chuck is more accurate but also more limited, so I would always go with a 3 or 4 jaw chuck first before buying a collet chuck. When you have all three it just increases the chuck changing problem, you just can't win!


Thread: Ebay being clogged up by certain sellers
06/01/2020 13:48:56
Posted by Neil Wyatt on 06/01/2020 12:54:03:

The best solution, if you can afford it, is to buy from suppliers who support our hobby rather than saving a few percent by going to random suppliers on eBay...


Yes, I agree in general for a lot of things, but for certain things the " few percent saving " can be a few hundred percent if coming from China, and then it becomes much more difficult to justify.


Thread: Australian Bush Fires
06/01/2020 10:09:39

This is one of the main items of news here in the UK. The situation seems dire and perhaps it will make more people take climate change more seriously. I can only imagine the terror experienced by people caught up in the fires.


Thread: Cheap gear cutters from China
29/12/2019 18:47:08
Posted by Pete Rimmer on 29/12/2019 18:23:17:

The simple rule for sharpening them is always sharpen the face so it remains in line with the centre. This means you have to rotate the cutter to grind more off, rather than moving it.

Thanks for that tip Pete, every day is a learning day. It makes sense when you think about it, the trouble is it is so easy to jump in without thinking.


29/12/2019 16:11:44
Posted by Jens Eirik Skogstad on 29/12/2019 15:51:24:

Douglas Johnston..

I has the gear cutter same factory as your gear cutter where there is marked on gear cutter: 上hot工 (Shàng gōng).

Homepage Shang Gong: **LINK**

Edited By Jens Eirik Skogstad on 29/12/2019 15:54:33

Thanks for that link Jens Eirik, it looks as if the cutters are made in a decent factory rather than some backstreet outfit.Have you tried cutting steel with your cutters, and if so how well have they stood up with regard to wear?


29/12/2019 16:01:02
Posted by JasonB on 29/12/2019 15:45:03:

I bought a couple of similarly priced MOD1 cutters and although they did the job they were starting to loose their edge after about 70T each in 1/4" wide steel so you get what you pay for.

That is interesting Jason, as long as I stick to aluminium they should be fine for letting me try out gearcutting. They do also look quite easy to sharpen, so even if they do blunt quickly they can be touched up to give extended service.


29/12/2019 15:10:34

I forgot to mention the ebay number which is 162447654385


29/12/2019 14:54:20

I have just received a set of 8 gear cutters from China via ebay and I must say they look rather nice. I have wanted to try gear cutting for a while but could not bring myself to pay up a lot of money for something that would not get a huge amount of use.

I took a punt at the Chinese ones, not expecting anything great, but I must say they do seem well made. I have not used them yet so this is just a first impression, but at about £38 for a set of 8 cutters they do represent good value provided they cut well.

The workshop is a bit cold at this time of year so I will have to wait a bit before trying them out, but at least I can sit in the warmth and look at them!


Thread: Merry Christmas Everybody!
24/12/2019 19:04:18

With 2020 vision I hope we all can see a bright future. Even Brexit (sorry! ) might look better.


Thread: Scam alert
19/12/2019 10:18:48

Just noticed this thread, I have also been getting these calls saying Amazon was about to take money from my account. This just started up after I bought something from Amazon and they said they were giving me a free trial of Amazon Prime. I did not want the free trial and searched the page at checkout to stop it, but it seemed I could not opt out. I nearly cancelled the order but reluctantly went ahead. I later checked my account with Amazon and found I had not been signed up to Prime and did not need to cancel. Then the phone calls started (about 6 so far ), so it would seem that Amazon has a security problem which I do hope they are taking seriously.


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