How To: Restore a Morris or keep fit

[Mike K]

I managed to drill out all of the broken M6 bolts and tapped new threads to accept the heli-coils,

This was a long and tricky job.. the Mag drill did the job well.. I bought a cheap Mag drill on Epay but it worked out OK .

The original little M6 bolts have oversized heads .. for 3/16" BSW size spanners . I will buy some 8mm bolts and machine them down to M6 and rethread them. This sounds crazy but the larger heads are needed to seal the gasket .

Morris inherited Metric tooling when they took over the WW1 era Hotchkiss factory , the Morris oversized metric bolt heads were made to suit the common U.K. Whitworth spanners.

[David Herbert]

Re. mismatched heads vs. threads: I had a 1921 German Jung steam locomotive that had whitworth threads but metric heads. I have a Japanese bench grinder made in the '70s with whitworth threads.

David

[Lionelgee]

Hello Mike,

What brand and model is your 'cheap' magnetic drill? Are you happy with its performance so far? What changes would you make to it if you wanted to improve its performance and had the desire to do so?

Kind regards
Lionel

[Mike K]

Originally Posted by Lionelgee

Hello Mike,

What brand and model is your 'cheap' magnetic drill? Are you happy with its performance so far? What changes would you make to it if you wanted to improve its performance and had the desire to do so?

Kind regards
Lionel

Hi Lionel

The model is MD40. It has cast iron V ways for the drill to go up/down. There is another common brand called VEVOR - I looked at a few reviews of the VEVOR and it has a few problems i.e. the twist drill chuck not fitting correctly on it's tapered arbor which means the chuck wobbles.

These mag drills are normally used with annular cutters, the annular cutters cut large diameter holes more easily than normal twist drills. . The twist drill chuck that comes with the MD40 is a accessory that you can change to, it is mainly used for drilling small holes with the normal jobber drills.

I noticed the price of the MD40 has gone up recently, I am glad I bought one before the price jumped up.

These Ebay mag drills are not industrial quality machines, they would not stand up to everyday use by a tradesperson.. but they are OK for hobby use in the back yard shed.

I had to lookup Jung steam locos !