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Old November 8th 06, 07:54 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

For a kitchen sink that requires a worktop cut-out size of
980x480 (cr=20) what does "cr=20" mean here?

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Old November 8th 06, 08:07 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

Jeff Allen wrote:
For a kitchen sink that requires a worktop cut-out size of
980x480 (cr=20) what does "cr=20" mean here?


Corner radius ? The cutout is not a full rectangle and a 20mm radius
on the corners sounds about right. You would measure out the enclosing
rectangle, though, and cut a smooth quarter turn from 20mm in, on both
sides.

[I'm guessing, btw.]

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Old November 8th 06, 08:11 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

In an earlier contribution to this discussion,
Jeff Allen wrote:

For a kitchen sink that requires a worktop cut-out size of
980x480 (cr=20) what does "cr=20" mean here?


Corner radius of 20mm?
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Roger
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Old November 8th 06, 08:23 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

In an earlier contribution to this discussion,
John Laird wrote:

Jeff Allen wrote:
For a kitchen sink that requires a worktop cut-out size of
980x480 (cr=20) what does "cr=20" mean here?


Corner radius ? The cutout is not a full rectangle and a 20mm radius
on the corners sounds about right. You would measure out the
enclosing rectangle, though, and cut a smooth quarter turn from 20mm
in, on both sides.

[I'm guessing, btw.]


Great minds think alike - see my other post!

I find that the easist way to mark out corner radii like this is to find a
tin of the correct diameter (in this case, 40mm), place it in each corner in
turn so that it is tangential to the sides of the rectangle, and draw round
the appropriate quarter of it.
--
Cheers,
Roger
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Old November 8th 06, 11:10 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

The message . com
from "John Laird" contains these words:

Corner radius ? The cutout is not a full rectangle and a 20mm radius
on the corners sounds about right. You would measure out the enclosing
rectangle, though, and cut a smooth quarter turn from 20mm in, on both
sides.


I'd use a 40mm holesaw on the corners and join up with straight lines.
Remembering to set the hole centres in by 20mm each way, of course.

--
Skipweasel
Pay no attention to that man behind the curtain.


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Old November 8th 06, 11:48 PM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

Jeff Allen wrote:
For a kitchen sink that requires a worktop cut-out size of
980x480 (cr=20) what does "cr=20" mean here?


It's the 'criticality' rating (known colloquially as the 'Curse Ratio')
- it's simply a measure of how important it is you get the cut right
(first time). ;-)

Mathew

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Old November 9th 06, 04:05 AM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

Roger Mills wrote:

I find that the easist way to mark out corner radii like this is to find a
tin of the correct diameter (in this case, 40mm), place it in each corner in
turn so that it is tangential to the sides of the rectangle, and draw round
the appropriate quarter of it.


Or for a posh version:

http://www.axminster.co.uk/product.a...sfile=1&jump=0


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
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| John Rumm - john(at)internode(dot)co(dot)uk |
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Old November 9th 06, 10:04 AM posted to uk.d-i-y
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Default Cut-out dimensions for kitchen sink

In an earlier contribution to this discussion,
John Rumm wrote:

Roger Mills wrote:

I find that the easist way to mark out corner radii like this is to
find a tin of the correct diameter (in this case, 40mm), place it in
each corner in turn so that it is tangential to the sides of the
rectangle, and draw round the appropriate quarter of it.


Or for a posh version:

http://www.axminster.co.uk/product.a...sfile=1&jump=0


I don't do 'posh'. g
--
Cheers,
Roger
______
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monitored.. Messages sent to it may not be read for several weeks.
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