Recent content by macmarch

Mm, I thought the fact that being a prime number would be the stopper. I don't have CNC, yes, I have the RV6. I am looking to follow "Chris of Clickspring" and build the Antikythera mechanism. There are actually 3 high tooth count gears and he does them by file. I haven't downloaded the...

I have a need to cut some gears. Trouble is the tooth count. 233 teeth. Can anyone give me a pointer as to how to do it?

Hi All. Haven't posted for a while as I have engaged in other fields. I was doing someone a favour and had just, luckily, finished machining a dovetail when my 20yr old MD30 m/c decided enough was enough. The noise as the, I am assuming, the bottom bearing broke up sent my blood cold. What I...

Hi all, For 'ordinary' steel, ie non hardened then I still have steel devices that I made when an apprentice, (50yrs ago), stillnot gone rusty. " methods were used. 1) Clean and then heat part up to 200/300 degrees then drop into USED engine oil for 24 hrs. Its the old carbon that does the...

Hi Tinkerer, Thanks for that. I have made a plug gauge 21mm dia. I'll bore a test hole and try the bearing in and go from there. I'm not concerned about the surface hardness as the part will only rotate about 100 degrees. The shaft is Silver steel and the bearing will only be sliding along...

To all who have looked the 4 way Stop unit. OOPS Now I have worked out how get a decent looking page I have just noticed a MAJOR error in the narrative. It concerns the fitting of the clamps. CLOSER should be FURTHER. I have highlighted it in red.

Thank you all. Omnimill, I like the slot you added, modified mine yesterday. Offering no 4 is now well underway and I hope to finish it over Christmas. Just having to learn how fit needle roller bearings. Can anyone advise how much undersize the bore should be in order to get the bearing...

Hi all, Thanks for all the visits to my website. When I work it out I'll make it look like it should. Meanwhile offering no 3 is now up. http://fenlandrao.weebly.com

It has taken a while but the second offering is now up for you to peruse. I'll do my best to answer all questions. http://fenlandrao.weebly.com/engineering.html

Thank you everyone. I put it up for anyone to copy and use. The next offering is somewhat more complex and will also be non dimensioned. Taking it to pieces today to photograph it then I'll put it up with the AVS. The one thing I like about engineering, is that you learn something new every...

A little task for after Sunday lunch. Trouble is, where is the line between a gadget and a tool?

lI offer this as a useful tool. I made my first one when an a apprentice and I have never seen one since anywhere else. There are no dimensions, as it depends on your particular vice. It can be used for spotting for cross holes and for jig drilling flat parts as each time you insert the piece...

I'll take some pics of the first one. Its an AVS for repetitive work. Very simple but saves hours of work. I had to make it when an apprentice but I have never seen one since.

Oops! Didn't realise that this was a DIY job. I also make a fair number of 'tools' and if they do the job required then what matters how it looks or how 'accurate' it is. Out of interest is it permitted on this site to put up pics and instructions of how to make a particular tool. Or should...

If it helps then have a look here, http://www.warco.co.uk/128-lathe-collet-chucks