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Cutting a D shape advice please
John Bonnett - 12/1/12 at 05:04 PM

I need to make a hole with a flat on it to suit an ignition switch. In the past, I've drilled a round hole undersize and then filed it to shape.

I just wondered if anyone has a demon way of dealing with this.

John


loggyboy - 12/1/12 at 05:05 PM

How bigger a radius/diameter?


John Bonnett - 12/1/12 at 05:21 PM

quote:
Originally posted by loggyboy
How bigger a radius/diameter?


I've not measured it exactly but about 19mm diam

[Edited on 12/1/12 by John Bonnett]


loggyboy - 12/1/12 at 05:30 PM

I would expect your method metioned is the most straight forward.
Its not like its big enough to use a jigsaw on.


LoMoss - 12/1/12 at 05:53 PM

Something like the q-max?

bit pricey d hole cutter

HTH

Moss


John Bonnett - 12/1/12 at 06:26 PM

quote:
Originally posted by LoMoss
Something like the q-max?

bit pricey d hole cutter

HTH

Moss


That'd do it


loggyboy - 12/1/12 at 06:38 PM

at that price i would hope it would do a lot more besides!


contaminated - 12/1/12 at 07:29 PM

quote:
Originally posted by loggyboy
at that price i would hope it would do a lot more besides!


Me too - like wash my pants and bring up my kids!


907 - 12/1/12 at 08:48 PM

Hi John,

For such awkward shaped holes I have been known to make a template for my nibbler.
Cut the circle, chop off the flat, and tack a bit on to the remainder of the circle.
For cutting i/d's the template has to be bigger, and o/d's smaller. The amount will depend
on the size of the nibbler head.

What follows falls into two distinct categories.

1. Next time I need to cut a similar hole I can't find the template,

or

2. I never need to cut this shape hole ever again.



Cheers,
Paul G


John Bonnett - 13/1/12 at 07:24 AM

Thank you Paul. It's only a small hole, too small to be able to use a nibbler I would have thought so I'll do it as before.

Best regards

John

PS I've just started the GT6; first time it's run since 1989. It was music to my ears and I had to take a few seconds of video.

http://www.youtube.com/watch?v=PgKkCJ8ee-k