Here is a list of all the postings JohnF has made in our forums. Click on a thread name to jump to the thread.
|Thread: Coal being phased out|
Some years ago I fitted one of these electric combo boilers in a cottage - very small cottage -- for my daughters partner. The boiler was for a closed pressurised system for heating and hot water, it works very well and because the cottage is small, 2 rooms down and one bedroom + bathroom upstairs its quite affordable. The reason for the choice was no gas and no room for an oil tank.
In this situation its fine but I would think hard before fitting a similar system on a normal size family home, it would i guess be expensive to run even though it uses off peak power as far as possible.
Regarding the OP I wonder what will happen to all the bio fuel units that have been fitted in recent time -- many with government incentives !
|Thread: Drill sharpeners|
Mark, you don't give any indication the size range of your drills but I agree with David and Mick above its not rocket science and you can learn with a little practice to sharpen drills very effectively on and off hand grinder. If you are close enough to me - nothing on your profile ! - I would be happy to assist - I am in NW Lancashire.
I do have a machine recently re-furbished to sharpen small drills I now find difficult due to ageing eyesight ! However I used such a machine when in industry for small drills, it will handle down to No 60 or 0.5mm and up to 1/4" Look at Christen in my albums to see the machine.
Also if you put "Drill sharpen" in the forum search there is a plethora of posts -- note sharpen not sharpener, sharpening !
|Thread: ME taps and dies|
Hi Bob, Some years back I purchase a seat of ME taps and dies in carbon steel and was disappointed with the fit in particular, several were very sloppy others were OK. In the end I spoke to the company Tracy Tools were excellent in their response particularly so when there was a considerable time from my original purchase and my decision to "do a swop" with cash adjustment for HSS, these are much better regarding fit and they cut better IMO than the CS ones.
|Thread: Returning to machining after a looong time|
Welcome back David time to stir the grey matter and resurrect your skills !
|Thread: Myford fit collets|
Assuming the ML10 has an MT2 in the spindle then the ER collets are your only option, however I would consider ER32, that what I use on my Super 7. The ER25 will not hold your 20mm dia components.
|Thread: cylinder boring|
Hi Philip, standard engineering practice is bore the cylinder, bush, bearing first then make the mating part to fit, far easier to turn or grind to a size and remove small amounts of material from a shaft than a bore.
Edited By JasonB on 11/02/2020 12:54:06
|Thread: Myford S7 headstock on ML7 bed|
ML7's normally have a shim pack in between the main casting and the cap so you can peel a layer of .002" ??? then re-scrape the bearing to fit.
|Thread: Myford S7 long bed|
Plus one for Nick's point regarding rigidity, but also consider the power cross feed machine will be newer than your machine, however that does of course not necessarily mean it is in better condition and with less wear ???? Much to consider as well as the additional length.
My S7 is a long bed [hardened] with power cross feed purchased new 1977/8? I chose the long bed for particular reasons.
Edited By JohnF on 02/02/2020 17:31:42
|Thread: renew driving licence|
Hi Duncan, just had to renew mine for the 3rd time and the first time around at 70 it did hack me off a little regarding the 7 1/2 ton restriction ! You can retain it if you wish but have to jump through a few hoops, at first i was going to but then thought when did I last drive a vehicle in that class and when am i likely to do so agin ? Hm!!! so many years back i don't really recall when and probably never again so decided not to bother.
However a word of warning DO keep you old license or make a copy of it BEFOR you send in your application, if your new plastic/electronic license comes back with something missing - say motorcycle -- then you would have a to take a new test unless YOU can prove you have already passed and without your old license its impossible !!
Do the same when renewing you 70+ license in three years time -- do not trust them !
Also the part to tow a trailer VIP
Edited By JohnF on 01/02/2020 16:31:53
|Thread: Ink jet printer woes|
Simon, I had a similar problem many years ago with an Epson, so long ago I don't recall the details but i found a solution trawling the internet, I just entered the following " epson printer not recognising genuine cartridges" and many ideas come up so may be worth a try ? But you will need to look for your specific printer I think. Mine ran for many years after the fix so good luck with your efforts.
|Thread: Steel for cutter?|
Vic, have a look here **LINK** might do your job ?
Or google "Angle Grinder Rasp"
Edited By JohnF on 22/01/2020 23:18:54
|Thread: Ian S C Back again|
Great to have you back Ian, you have been missed ! Believe it or not I was just having a neb at flights to NZ, fancy another trip soon-- not booked yet but !!!!
|Thread: Welder Inrush Current|
Hi Bill, Electricity is not my forte other than simple ring main and lighting wiring etc, however I had the same problem with my welders. The MIG ran just fine but my TIG which also has a stick welder outlet was a different story, for many years I had only a fused supply but we had the house upgraded to a modern RCD / MCB unit and I also did the workshop with a dedicated circuit for welders only as well as the ring main and lights.
From that point the TIG welder would start OK but after a singe run it would trip the MCB thereafter when trying to start a weld so contacted our spark who came and changed the MCB to a different rating - problem cured.
Trust this may be helpful but I am not competent to offer definitive advice but I can if you wish look at the MCB rating he fitted please let me know.
|Thread: Tool boat sizes?|
Peter, I reckon these are a pretty large size if i am reading the tape properly it would suggest they are S4 size tool post ?
Have a look here **LINK**
|Thread: Stuck Chuck|
Thanks MichaelG that shows the system used so regarding my post please ignore the section shown above relating to the split nut ! I had assumed the adaptor was a two piece arrangement ! I have used the drill press arrangement to remove VERY tight slowed screws with great success and no marring of the screw head/slot.
edit - you will of course have to clamp the chuck body to the table
Edited By JohnF on 07/01/2020 10:48:45
Steve, not sure just what kit you have available, access to a pillar drill would be useful but you do say it is on a rotary table fitting so assume you have a small mill which may suffice ?
Anyway what I would try is first make a screwdriver from an allen key then with this in the pillar drill chuck use a split nut to grip the screwed adaptor in your well tightened vice and using the drill quill to apply downward pressure to the screwdriver thus preventing it slipping out of the slot and armed with a spanner you should be able to release the screw - providing the thread/nut do not slip.
Good luck John
|Thread: Myford super 7 oiling|
I have one of these for my S7 from Pressparts **LINK** works very well and better than the genuine Myford one I have ! I also use a standard oil can, as it happens a Reilag but any will do for general lubrication of oil cups, bed etc.
|Thread: Can anyone identify this power hacksaw|
I don't think its a Bitsa but probably the motor has been added and it was probably made to be run off a line shaft ?
Try putting "Vintage power hacksaw" into google then look at images -- there are many and you might find a look-a-like ?
Interesting old machine and well worth restoring !
|Thread: Colour matching.|
Why not ask your punter to take the original item to his/her local paint shop/supplier and have it scanned then either purchase the paint or send you the RGB colour code ?
|Thread: Making a miniature leaf spring.|
Robin, when hardening very small or thin items I just suspend the item with thin iron wire, the type that florists use is ideal, don't use galvanised, I heat it in close proximity to the oil quench with a large flame and dunk it immediately into the oil. Never had a problem with hardening this way.
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.