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: t-bar material advice|
Colin, Niels suggestion is a wise one but I would suggest either EN19 or EN24T as a material for your Tommy bar
|Thread: EMCO FB2 Head Unit|
Have a look here for an operators manual **LINK**
If you want a parts list that may also be there if you search the files or I have one in pdf - message me with your email if you would like it
I would suggest Power Capacitors in Birmingham **LINK** for a replacement unit, no connection other than a satisfied customer.
|Thread: Bronze or brass|
My guess is Gun Metal which is in the Bronze family of copper alloys -- only a guess but the colour and un-machined surface looks like GM to me
|Thread: I need to cut chamfers into x64 pieces of mild steel - any advice?|
A bit late to the party and have not read all the posts but here are a few photo's of a jig I made many years ago to manufacture small dovetail pieces with a 60* angle but you could make one to do 45* in a similar form, I just mounted it in the lathe and took a facing cut, there is a sample I cut tonight to show the result -- I did not have a mill at the time i made this but if I was doing what your early photos show I would make a jig to hold several pieces and in a vice on the mill and use a standard endmill. John
|Thread: Annealing and tempering steel|
Andrew try putting pyrometer or temperature control in the search box there are some things that may be of interest. I find single words or 2 words in the search bring better results -- don't tell it too much !
|Thread: Hello from North Yorkshire|
Hello John and welcome to the forum, where in N Yorks are you hiding ? Not a bad idea to fill in a few details in your profile so in the future if needs be members can look to see where you are and what you're interested in. Steam engines are not my forte but as Chris says there are lots of members who build these.
|Thread: Ideas on how to make up a G-Clamp Swivel Foot|
I made several for a vice clamp, used a form tool to make the ball then made foot to suit with a drilled , nothing fancy. Do make sure the “neck” on the ball is long enough so the foot does not foul when it swivels. To hold in place close the clamp onto a suitable piece of material then with the material held in the bench vice peen over the end of the foot. I just gave a couple of strikes with a punch on either side but you can work around the top for abetted looking finish
|Thread: Myford ML7 accuracy|
Cal, I think the question you need to answer is what tolerance do you want or need to work too ?
+/- 0.0005" +/- 0.001" +/- 0.010" or ????
The next question is your budget ?
Then decide what size of work you want to do, I see several of the small machines mentioned which are fine if your work is very small but you are of course limited to their capacity whereas a larger machine will give you more scope
Hope this helps
|Thread: New Member, New Lathe. Smart & Brown Model A (Mk 1/1.5?)|
Jinks, Have a look here on the S & B group **LINK**
May find something of interest or help
|Thread: Marking steel|
Plus one for Duncan's observation ! I simply cannot understand why Youtube would allow this to remain on file, someone will surely end up with serious injury or worse.
|Thread: Help with choosing thread cutting inserts|
Dave aka SoD making an undercut at the shoulder is industry standard but doing it with a parting tool will potentially reduce the strength due to sharp corners creating stress points. Undercut tools as a general rule would be 1-1/2 x pitch wide with a radius on the corner adjacent to the shoulder and the "thread side" having an angle equal to half the thread angle or 45 deg.
|Thread: A SIMPLE POINT !|
I concur 100 % with Howard Lewis above --- must have gone to the same school !
|Thread: Reaming a hole|
The old "yardstick" for the drill size was reamer/hole size less 1/64" indeed the bushes available for jigs and fixtures from the main supplier for toolroom accessories for jigs, PTU [Production Unit Tool] were all to this specification.
However nothing is cast in stone you can be flexible depending on material, lubrication and not least what you have available ! Within sensible limits of course.
|Thread: Dickson QCTP on a mini lathe|
Hi Martin, I have an original Dickson Engineering installation leaflet and for the SO [Myford size] tool block it shows the optimum dimension of 7/8" form the lathe centre height to the top of the top slide and suggests 3/8' tool bits.
Unfortunately its a pdf document so cannot post on here. Hope this helps, if you want a copy of the pdf PM me with your email
|Thread: Editing classified ads|
Or just click Classifieds on the black banner then on the right you will see , place an advert and manage my adverts which shows your adverts and you can edit it
Aha just seen Jason has already mentioned this !!
Edited By JohnF on 15/08/2021 18:12:56
|Thread: Clarkson Dedlock|
Hi Terry, Here is a drawing of the arbor you need, I think the arbor you have is an updated one but this one is easy to make -- more photo's in my albums; John
|Thread: New Chuck won’t screw on|
Something similar came up on another post relating to ER chucks, accuracy TIR and fit. I had a problem with an ER chuck purchased from and made in Europe -- I eventually found out they were using UNF form threads instead of Whitworth form so I do wonder if some of the Far East product has the same problem ?
During my conversations with the producers of the ER chuck I acquired the correct thread tolerance dimensions for Go / No Go gauges for the "Myford" thread and made a GO gauge as close to these dimensions as possible with the equipment I have -- I am confident its close enough to the limits specified for practical purposes. I used a full form tip to make the gauge measuring over wires with an indicator micrometer.
The sizes were calculated as a favour to me by a UK gauge maker so I don't feel it would be right to publicise them, however if any forum members want them please PM me with an email address and I will pass them on.
Why any commercial company manufacturing a precision product would operate without the proper gauges is beyond belief !!
Another problem I have found with much of the imported Myford spindle tooling offered by suppliers is the register diameter on both male and female units is woefully outside the tolerance it needs to be to ensure TIR accuracy
Photo of my gauge
|Thread: Strange type in the Lates Posts ?|
Thank you one and all ! I have been otherwise engaged since my original post but at least its now explained -- I'll live with it !!
Anyone noticed the strange type appearing in the RHS Latest Posts column ?
The actual title appear correct but see the examples pasted below of the latest post column
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