Blotters on Diamond Grinding Wheels

Blotters on Diamond Grinding Wheels

This topic has 6 replies, 5 voices, and was last updated 22 December 2017 at 20:29 by Brian H.

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22 December 2017 at 15:19 #25713
Brian H
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@brianh50089
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22 December 2017 at 15:19 #333428
Brian H
Participant
@brianh50089
I think the answer to my question is NO, you don't need blotters on diamond wheels, the ones made from aluminium with a diamond coating, but does anyone know differently?

Brian
22 December 2017 at 17:02 #333440
Chris Evans 6
Participant
@chrisevans6
I don't know the official answer but I never use them on aluminium diamond wheels.
22 December 2017 at 19:10 #333448
Neil Wyatt
Moderator
@neilwyatt
No, the blotters are to make sure you don't have any stressed points on a bonded wheel.
22 December 2017 at 20:14 #333463
mechman48
Participant
@mechman48
Posted by Neil Wyatt on 22/12/2017 19:10:34:

No, the blotters are to make sure you don't have any stressed points on a bonded wheel.

+1 , Also provides a means of identifying what type, rpm, abrasive, grain, grade, structure & bond etc. that the wheel consists of.

George.
22 December 2017 at 20:21 #333464
Simon Williams 3
Participant
@simonwilliams3
It's a long time since I did the course, so I've been looking at the HSE Guidelines which have superseded the Abrasive Wheels Reg's under PUWER, and a "plate mounted wheel" is one of the specific exemptions from the use of blotters.

If I've understood the description, a plate mounted wheel is one where the abrasive grains are bonded to a backing plate, and the drive clamping force acts on the plate and not on the abrasive. That seems to describe a bonded diamond wheel pretty much spot on.

Common sense says that a blotter doesn't add anything to the mounting security of this type of wheel, so hopefully I'm reading this right.
22 December 2017 at 20:29 #333466
Brian H
Participant
@brianh50089
Many thanks all, for the answers, I'll ignore the blotters on aluminium backed wheels.

Brian
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