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Re: Why did they ban dado's in Europe?? (was Re: [FOG] Felder Dado Set cut quality)

 

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Riving knives should be less than the kerf but greater than the plate in thickness.? The additional weight of the dado also creates issues when using an injection brake as the brake unit must be? manually adjusted to stop the heavier cutter .? That requires either a larger brake unit or greatly reduces the number of times per hour the machine can be shut off.? Dave

From: [email protected] <[email protected]> on behalf of Randy Child via Groups.Io <strongman_one@...>
Sent: Tuesday, January 28, 2020 7:28 AM
To: [email protected] <[email protected]>
Subject: Re: Why did they ban dado's in Europe?? (was Re: [FOG] Felder Dado Set cut quality)
?
Very Very interesting!! thanks for sharing..

On Tuesday, January 28, 2020, 04:02:58 AM PST, jmkserv@... <jmkserv@...> wrote:


Jonathan that appears to be the same 3 pcs Dado they use here. Again I also tested that unit and because of the lack of cutters gave the same sort of cuts. The other issue is the narrowest cut it can achieve is 8mm/5/16". This is sort of a bastard size as far as materials go, at least in NA. Thanx for bringing us up to date on the EU regulations.

On Tue, Jan 28, 2020 at 5:20 AM Jonathan Martens <jonathan@...> wrote:
On 27-1-2020 19:27, Randy Child via Groups.Io wrote:
Why did they ban dado's in Europe??

Safety regulation IIRC:

- a riving knife has to be used at all times, I have not seen a dynamic riving knife matching the kerf off the dado blade. Riving knives are usually a little wider than the saw blade kerf, which is not possible when cutting dados.

- axis in EU are usually braked to prevent long spinning after shutting off the machine, as far as I know this is different to non-EU. The inner blades of the dado stack are often not rigidly fixed to the axis and therefore can not be braked easily.

- shaper is a safer alternative with appropriate hoods (also required) and/or mechanical feeder as the cutter is minimally exposed.


But stuff seems to change here as well. Not sure if that is for the better or according to regulations:

Apparently Felder sells a device that has a striking resemblance with a adjustable groove cutter for the shaper as a saw blade as well. The dutch Felder webshop shows one on a saw with part no. 500-03-021 ()

It still is different to a dado blade though as there is a left, a right part and optional central part, which are rigidly fixed to the axis using the pins on either side of the axis hole.


Regards,


Jonathan



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John Kee
JMK Services
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