These articles by Geometer (Ian Bradley) were written about half a century ago. Pick up your copy of Model Engineers’ Workshop each month or subscribe, to read more like this.
The Editor visits the East Somerset Society Of Model And Experimental Engineers at The Bath And West Railway Ladybird running on the 7 1/4in. gauge track. Sara, a modified 7 1/4in. gauge locomotive to the Tinkerbell design. Another view of Sara standing at the platform. Note the signal box in the background. The Bath And West…
My main hobby interest is the design and construction of scientific instruments, in particular devices for use in geophysical research. A recent project was the construction of a sensitive seismometer for detecting the microscopic ground motion that results from distant earthquakes. The project was a success and led to a small commercial venture in which…
Filengrène was designed by an educator (Mr André Meyer) specialising in gear machining. There is a video description of the software, ref 1 at the end of the article. The aim of the software is to design any type of gear (with all the possible refinements) and to machine them with plain milling cutters on…
Mat Shaw says: "Reading the fantastic article by Geoff Andrews in MEW issue 321 on modifications made to his mini lathe, one of the photos reminded me of an accessory I made for my Boxford lathe a while ago. This is one of those items that doesn’t get used all the time, but when it…
The chuck I am dealing with is a 4inch Pratt Burnerd three-jaw, specially made for a Myford ML7 lathe. It is approximately 40 years old so you may find different arrangements on any later, updated versions, photo 1. 1. The 4” Burnerd Grip Tru chuck. Under most circumstances, when cleaning is required, it is possible…
This useful chart shows imperial and metric equivalents, as well as offering suggested tapping drill sizes for a wide range of threads. Download links: ChartAChartBChartC Many thanks to the ‘Man Who Can Scan’ – Nick Farr – for sending us good quality scans of his copy (we don’t have an electronic version on file). Nick…
The literature on cutting metric threads on a Myford 7 Series lathe refers to the use of a 21 tooth change wheel which is now effectively extinct. I have prepared a table showing gear trains for all the ISO metric series threads in my copy of the Dormer Tap and Die Handbook using the readily-available…
