Rank: Super forum user 
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When is the best time to use a type 27, type 41 or type 42 abrasive wheel and why do some have depressed centres?
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Rank: Super forum user 
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I don't know what you're on about but surely you should have received training before use? That training should cover all such issues.
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Rank: Super forum user
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ChrisBurns wrote:I don't know what you're on about but surely you should have received training before use? That training should cover all such issues.
I don't intend using them. I was just curious and thought i'd ask someone who specialised in Abrasive Wheels. Hopefully the next response will be from someone who knows something about them.
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Rank: Forum user
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That`s a very random question, mabbe if you clarify you will get a better responce
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Rank: Super forum user
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dec1888 wrote:That`s a very random question, mabbe if you clarify you will get a better responce I agree - you could even get some smart alec saying "half past three" :-)
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Rank: Super forum user
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Frank
Ultimately it is about horses for courses. Type 27 wheels are generally used where high cut numbers, or large areas are to ground, are anticipated, their abrasive and construction are more tolerant of higher heat levels.
Types 41 and 42 are good all round performers but the depressed centre for most purposes is an irrelevance and I see arguments both pro and con for each.
Bob
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Rank: Super forum user
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boblewis wrote:Frank
Types 41 and 42 are good all round performers but the depressed centre for most purposes is an irrelevance and I see arguments both pro and con for each.
Bob Cheers for the help, Bob. I was watching someone with an angle grinder and he had 2 cutting discs. One with and one without the depressed centre. Just wondered which one he would use on cutting a section of tubular handrail and why? Had to come away or i would have asked the user.
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Rank: Super forum user
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Frank this site may be useful. It does not seem to include the information on heat resistance that I had from the 3M site som maybe it is specific to their wheels only. I have to admit to preferring them as manufacturers so have not really investigated http://www.lni.wa.gov/wi...l/ht2-ms.htm#Type27WheelBob
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Rank: New forum user
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The abrasive wheels I have worked with, the depressed centre discs are used for grinding not for cutting the depression keeping the locking nut or clip clear of the work
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