Countryman's Steam - Chain drilling

Edited By JasonB on 04/04/2011 15:15:36

Edited By JasonB on 04/04/2011 15:17:35

Jason

Probably a typo on the chain drilling. Drilling every other hole on 1/8" spacing out to 4 mm will clear the webs between the holes with minimal chance of drill wander. Or maybe drill every other hole 4 mm in the first place by going round twice. The inexperienced worker can do without slightly misplaced holes running into each other on their first efforts at chain drilling. Not to mention the broken drills!

Mixing imperial (1/8") and metric dimensions may be frowned upon but its an excellent way of getting a small clearance / space with limited tools and no need for super accurate measuring gear. Laying divider points onto a good engraved rule is very accurate, especially via a magnifier.

Often thought that a proof reading panel would be good for beginners constructional series articles. Normal ones are hard enough to write when at least you can assume that a bit of reader experience will click in to tide over small errors and "not quite what I meant" phrasing. Beginners stuff is a nightmare for the experienced guy to write, especially as he has his head full of the design and how he made / will make it. Infinite scope for "mentos" (mental equivalent of typos). Hard for experienced workers to spot too as we tend to read what is meant not what is written. Our overworked editor doesn't have time for the detail attention needed.

Clive

Edited By V8Eng on 04/04/2011 16:19:21

Jason 4401 comes after 4400,Sorry Jason i understand now it will be in 4401

Edited By David Costello on 04/04/2011 17:33:27

Edited By V8Eng on 04/04/2011 17:44:19

Oh and no idea what the bits in the bottom right are meant to be, hopefully the next installment will enlighten us

Edited By JasonB on 04/04/2011 18:47:30

Edited By KWIL on 05/04/2011 09:01:13

Edited By David Clark 1 on 08/04/2011 15:53:54

Edited By JasonB on 08/04/2011 17:09:08

Edited By David Clark 1 on 08/04/2011 22:24:09