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: Diamond Lap for sharpening Brazed TC tools|
How long before the crocodile clips touch, but the idea is great.
|Thread: The making of Steel Balls|
No wonder quality bearings are so expensive. So many corners to cut with cheaper bearings. The balls from quality bearings make excellent references for checking micrometers etc.
|Thread: Using Counterbores|
I had the same problem with a couple of my counterbores in that I did not have the correct size drill before using the counterbore. I simply solved the problem by holding the counterbore in an accurate collet chuck and used a sharp polished carbide cutter insert to reduce the diameter of the front part of the counterbore. Worked a treat on the hard HSS and left a mirror finish. It never fails to amaze me what you can do with this type of carbide insert.
|Thread: Stuck oil filter|
Edited By Douglas Johnston on 09/07/2020 11:23:32
|Thread: Yipee the F1 is back on|
My only hope is if C4 in UK shows highlights since I don't have Sky.
|Thread: machining acetal|
Any sharp endmill will cut acetal without a problem. It is lovely stuff to cut and gives a very nice surface finish. Just play around with speed and feed to get the best result.
|Thread: R8 or morse taper 3?|
I would bet that most people who have changed from Morse taper machines to R8 would not want to go back. I used a Morse taper machine for many years before getting an R8 one and there is just something about the R8 spindle that makes it much nicer to use.
|Thread: Hermes Parcels|
The postman has just delivered a small package from China that was ordered over 3 months ago, so there is still hope for anyone else waiting for a delivery from China. I had given up any hope of receiving the item so am well pleased.
|Thread: Soldering Iron|
I bought a Hakko soldering station a year or so ago and like it a lot. Not cheap but warms up very fast and is the best soldering iron I have had.
|Thread: garden chair, wooden slats broken.|
I had to replace a couple of the slats on my garden seat a few years ago and just used some handpicked softwood from the local B&Q store. A treatment with some cheap wood preservative and left to weather for a while and the result was very good and soon matched the much older original slats.
|Thread: Myford ML4 gib strips|
When I made some gib strips a few years ago I used gauge plate and did as Jon suggested to flatten one surface. Incidentally the thickness of the strip does not need to be perfect since the back face is only in contact with the gib screws.
One other thing I did was to cut the ends with a sharp endmill (a new carbide one in my case ) so that the end edges in contact with the slide had no discernible rounding. This helps to prevent any fine chips getting trapped between the gib and the slide.
|Thread: Face mill prices|
I bought a 50mm and a 63mm one and R8 arbor from ARC after I saw the review in MEW. The quality is superb and belies the low price. I also bought some of the ground and polished inserts and they too are excellent.
The only problem now is the lack of availability due to the pesky virus.
|Thread: Arc Euro and Coronavirus|
Just seen the latest email from ARC telling us they are closing for the duration of the pandemic. The picture of the last bog roll in the country did make me smile though. Things must be getting bad if we have no more ARC for the time being. I do hope the lifeline of MEW can keep going to keep me on an even keel.
Edited By Neil Wyatt on 31/03/2020 16:40:44
|Thread: What to use for New Worktop?|
Thick kitchen worktop is hard to beat, you can sometimes get slightly damaged ones at a good price from local diy outlets ( I am often amazed at how many they seem to damage during transit or inside the store ). Good sturdy wooden framework under the top, don't use the flimsy kitchen units. If mounting a small lathe, a concrete or granite slab on top of the worktop gives a very good rigid base on which to mount the machine.
|Thread: What are you reading?|
Just got my latest copy of MEW to keep me happy for a short while in between reading through all the Tom Thorne novels by Mark Billingham. Not my normal reading matter but was given the first two Wolf Hall novels a while back and really enjoyed them. Very sad to see the death toll in Italy is now greater than China, this is a year none of us will forget in a hurry.
|Thread: Reeves and Coronavirus|
Moves like this are very welcome but don't think things are going to get better soon. Current predictions show that we have many months of disruption ahead of us. I don't wish to sound too gloomy but this is going to be one hell of a ride. Good luck!
|Thread: Complicated post|
|Thread: Blacking hot steel in oil|
Used engine oil is nasty stuff and best avoided. I tend to use supermarket rapeseed oil which works very well.
|Thread: Powder coating|
I see I am not the only one to suffer this. Half an hour ago I was painting a section of a bathroom towel rail radiator that had been powder coated. Just as described above a small crack in the coating has resulted in the coating starting to peel off over an area of a few square inches. I am hoping that some radiator paint will halt the peeling.
|Thread: Cautionary tale|
I would be very wary about ordering anything from China at the moment. With the shutdown of large areas due to the virus and restrictions on flights it could be a bit of a lottery. I have a couple of small items that were ordered a month or so ago and I don't expect to see them any time soon. However, my slight inconvenience is of no matter compared to the struggles to contain the virus. The whole world could soon be in the grip of this virus and it seems to target old people like myself and probably many on this forum, so we should all take care.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.