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: Small milling machine|
Another option that does not get mentioned much is the Myford VMB. I have had one for many years and it is quite a robust machine . My one has variable speed drive and poly-v belts and the build quality is very good. I believe the machines were built in Taiwan then had some finishing work done at the Myford factory. Second hand ones crop up now and again and prices are usually reasonable despite the Myford connection.
|Thread: tipped tooling|
The other thing that is also often mentioned is the need for high speed. While this can be true for a lot of carbide tooling it is not needed for the sharp polished inserts. I use this type of insert most of the time on a lightweight machine and they cut well at a wide range of speeds.
|Thread: What bench drill|
I used to get regular invitations to MM vat free days but have not had one for a long time. Have they given up on this marketing ploy?
|Thread: What sort of things DO NOT inspire you|
People with a fixed mindset who can't see the other side of an argument.
|Thread: Coal being phased out|
As a matter of interest why is wet wood a problem. I know nothing about wood burning but just wondering where the problem lies. Why does burning wet wood produce more pollution?
|Thread: Carbide inserts. 0.4 or 0.8|
If you have a hobby size lathe I would stick to 0.4 radius as a good compromise. I must admit I like the 0.2 ones for a lot of what I do but the cutting point of the insert can be easily damaged if not careful.
|Thread: Encryption software|
I think we have to be practical about passwords. I am at an age where memory cells seem to be diminishing at a disturbing rate and it is simply not practical to remember dozens of passwords. Lets be honest, most of us write passwords down somewhere and the chance of this getting into the hands of some dodgy character is remote. It is easy to hide a tree in a forest, so apply that idea to a notebook.
|Thread: Frost steel blacking kit.|
Martin, that link to ebay for the cold blue does not seem to work. Not for me anyway.
|Thread: Tool post for Myford ML10 lathe|
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|
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|
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?|
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|
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|
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|
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|
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|
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.
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|
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!
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