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bibman  
#1 Posted : 31 August 2012 09:02:20(UTC)
Rank: Forum user
bibman

Can anyone tell me what is the minimum gap to avoid an in-running nip on a conveyor belt?
I seem to recall, from my distant past, that it was 5mm but I cannot find any documentation to verify this
Steve Sedgwick  
#2 Posted : 31 August 2012 09:29:52(UTC)
Rank: Super forum user
Steve Sedgwick

There are a number of in-running nips on c/vs and a variety of different types of guards.

It is not just about the gap. Consideration is also given to the distance from the trap point.

Try some google searchers on c/v guarding, if you do not find what you want come back
Steve
Jake  
#3 Posted : 31 August 2012 09:32:47(UTC)
Rank: Super forum user
Jake

Yes it is 5mm, in accordance with BS EN 620 "Continuous handling equipment and systems. Safety and EMC requirements for fixed belt conveyors for bulk materials".

A useful (freely available via google) guide that I;ve used in the past (although not UK specific) is:

http://www.irsst.qc.ca/m...ents/PubIRSST/RG-490.pdf

Section 2.2.2.3 covers in-running nips.
JJ Prendergast  
#4 Posted : 31 August 2012 10:11:09(UTC)
Rank: Super forum user
JJ Prendergast

Try British Standards book PD5304 as well for general principles of machine guarding*

Other standards are available
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