Kerry drill model

Hi all,

As stated elsewhere I have begun a new project, copying the Kerry Super 8 pillar drill I use in my workshop.

I thought it would be a nice easy little project until I remembered the backgear mechanism which I will have to replicate to scale if I am to get it to work properly.

I've never cut gears before so there is something for me to learn before starting the head. Do I need a dividing head or some such? I have a horizontal mill and a vertical so hope I can produce spur gears on either one.

The base is together now and took me a couple of weeks to fabricate from scratch, the main base is a lump of cast aluminium from a Hemingway kit that was going spare in the shop.

The tool tray/head support collar is made from steel bar and a lump of old cast iron from a garden sign, you can tell why I used the sign from the attocious spelling error on it.

Just a photo of the items completed so far.

Off to a good start

A rotary table with index plates or a dividing head would be the best bet but depending on the Number of teeth required you may be able to bodge something up with lathe change gears and a simple indent.

J

I have made a little more progress on the model in between renovating my new machinery and sorting out Christmas lol.

The table support was made as a fabrication of cast iron parts machined to shape and then finished on a belt machine to resemble the original castings.

I think it looks about right on the pillar so I will continue to finish the clamp screws etc before painting.

Then its planning the head machining process, not exactly sure how I am going to tackle it but I will sketch out a plan in my head and then see how it goes. I have sourced ready cut gears from HPC Gears to make the back gear train so that I avoid the gear cutting. I will still have to produce a rack and pinion for the quill.

More later I hope.

That's looking quite a smart job coming on.

Oh how I miss my Kerry bench drill.

A little progress on the work table. I can now start on the actual drill head. Can't wait for that lol

.

Great news ... I'm looking forward to it

MichaelG.

Nice!

That's one model we could feature in MEW

Neil

Mick

You have too much time on your hands!

And yes, I am jealous..........

And yes again, I can't wait to see this finished .

nice work there looks great

That is a lovely job. I have a hybrid Kerry Meddings drill as the base casting on a Meddings I bought was found to be cracked when I got it home and cleaned it. I bought a Kerry like this from a well known auction site as it had a nice column and was a floor standing machine unlike the bench Meddings. As I then found that the Kerry had suffered dentistry on the quill rack I made a hybrid from the two. Head and table are Meddings, rest is Kerry.

On the gear cutting question, get yourself a copy of Ivan Law's book on the subject. I bought a job lot of the Brown and Sharp cutters (guess where from) and designed my loco gearbox around the cutters I had in stock. The calculations for the safe power transmission capacity were found in a Machinerys Handbook, but that shouldn't be required for your model. I used a Vertex BS0 dividing head on an old Denbigh miller. The gears came out great for a first time effort.  I'll pop a couple of pictures on shortly.

Edited By Steve Addy on 24/01/2017 16:36:19

Milling gears on the Denbigh H4 Auto of 1930s vintage

Finished gears mounted on their shafts. Small ones are 10DP larger ones are 8DP.