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Member postings for David Clark 1

Here is a list of all the postings David Clark 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: First Project
19/07/2009 15:59:22
Hi There
The rear horn dimension is on the drawing at the top of the frame as is the front one.
The only dimension missing is the angular one and that is on the original as a short dotted line so I missed that one.
I do proof read the drawings on the Northumbrian. I go through them with a magnyfying glass. I have not spotted an error yet but I was looking to make sure the dimensions were correct as redrawn. In future I will check to see if any dimensions are missing as well.
regards David
Thread: Lever Feed Tailstock
19/07/2009 12:03:47
Hi There
We published a lever feed tailstock for the C3 in Model Engineers' Workshop issue 143.
regards David
19/07/2009 11:43:38
Hi There
I will talk to Dave Fenner.
He will probably produce a design although it will probably be a lever feed version.
regards David
Thread: Denford CNC milling
19/07/2009 10:34:52
Hi There
I had a Denford Triac for a while and it was a very sturdy little machine.
I don't know Denford's philosophy on the software, you will have to ask.
It was very heavy. I bought it from Ebay not realising how heavy it was.
It would take four people to lift it.
I was lucky, the chap selling it was coming to my area in a couple of weeksand bought it with him. The two of us managed to slide it off the back of the pickup truck and straight onto the angle iron bench it came with. We did have to take the front of the shed off to get it in.
I only sold it as I did not want to move it when we moved.
Boxford only sell to educational establishments because their software can only be licensed to educational users because I think something to do with the people who write the software. They did however downgrade the roms in my 160 homing Boxford so I could use the software available on their website. Cost me £150 though. I have a Boxford 125TCL now and will definitely be converting it to Mach 3 eventually.
regards David
Thread: First Project
19/07/2009 10:26:21
Hi There
Omissions are as follows:
The angular run out of the cylinder centreline is 3/8 inch from the extreme top of the frames. This line is in line with the left hand top of frame that is 3/8 down from the extreme top.
The trailing horn slot centre is 2 inches from the right hand end.
This is on the top of the drawing but the line has not been carried down to the horn slot.
The holes for part 10 are 1 5/8inch to the centre hole.
Again see top of frame dimensions.
Two vertical holes C at front of frames are equispaced around the front hole.
regards David
19/07/2009 10:17:57
Hi There
There a few omissions on the frame drawings.
If anyone spots any then email me direct and I can get confirmation of correct dimension and post on here.
regards David 
Thread: Jowett Poppet Valve Engine from Chelston Engineering. Drawings wanted.
17/07/2009 17:48:37
H There
Does anyone have a copy of the drawings for the Jowett Poppet valve engine as sold by Chelston Enginering?
Reasonable price paid.
regards David 
Thread: Machining Castings
15/07/2009 11:28:31
Hi There
More photos added.
Some of these were taken several years ago with a low resolution camera.
regards david



Edited By David Clark 1 on 15/07/2009 11:32:11

15/07/2009 09:38:56
Hi There
Have not done that part yet.
I have done the underside but that was with a file.
Although I machined the underside on a previous engine, I thought I would use file and wet and dry to see what results I got and they were excellent.
I might have photographs of the last time I machined one.
I will see if I can find them.
regards david
Thread: Hart grinding rest
14/07/2009 22:13:11
Hi There
regards david
Thread: Metro Article
14/07/2009 22:11:18
Hi There
From memory, volume 139 and 140.
regards David

Edited By David Clark 1 on 14/07/2009 22:11:33

Thread: Machining Castings
14/07/2009 22:09:52
Hi There
The 10H bottom was done exactly the same as the 10V.
Just make sure you remove any flash from inside the casting and it should be fine.
regards David
13/07/2009 21:47:02
Hi There
I have posted some photos of machining Stuart 10V and 10H parts.
regards David
Thread: MEW Just gets better
13/07/2009 21:10:16
Hi There
I rarely get photos I can use as covers.
Usually they are too low a resolution, have a cluttered background, are landscape format or are generally unsuitable.
Open to suggestions.
Model Engineer is far easier to get suitable covers.
regards david
Thread: Diamomd tool holder
13/07/2009 09:14:45
Hi There
I have heard it is very good.
I do have an article to publish on making a tangential turning tool that is very similar.
It will go into Model Engineers' Workshop.
regards David
Thread: BA Threads or Metric Threads?
13/07/2009 09:13:21
Hi There
BA are not obsolete.
The standard has been recently updated.
To standardise on one set of threads seems a bit daft.
Use what is most apropriate.
regards David
Thread: RLE Engine
13/07/2009 09:10:57
Hi There
Construction was in Model Engineer.
Probably by Stan Bray.
regards David
Thread: Machining Castings
12/07/2009 08:51:26
Hi There
You can't take 1/16 of the Stuart bed plate castings or engine base.
There is barely 10 thou on each face.
I will put some photos in a gallery a bit later today.
I have started a Stuart 10H and 10V recently and am photographing it as I go.
It will appear in Model Engineer over the next few months as a beginners series.
regards David

12/07/2009 00:38:07
Hi There
I have just machined one with no problems.
No hard spots at all.
Try putting a small chamfer on the cutting edge.
regards David
Thread: Blued steel plate
10/07/2009 11:41:24
Hi There
Does anyone know of a supplier of blued steel plate for loco frames.
Small quantities prefered.
I believe this is hot rolled sheet.
regards David
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