Rank: Forum user 
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???? Ref: Codes on Wheels/ Disc's ??? Currently looking at a abrasive wheel presentation that I recieved from a Major Company, but slightly confused by the idenification markings that are given 27 A 30 R 5 RF 41.and the breakdown.....
I believe it should breaks down like this (I got my breakdown from CITB GE700 module 19) ??
27 = type of Abrasive
A = Nature of Abrasive
30 = Grain size
R = Grade
5 = Structure
RF = Nature of bond
41 = Type of bond, etc .......
Is this correct??
Which part of the above indicates the type of wheel as the presentation I recieved stated it was the first or last numbers..
Hsg 17 states there are a few diffferent wheels that's why I have chosen the number 27 & 41 in the breakdown as they clearly don't mean the same
Would also like guidance on where to find info on speed rating band found on large discs l
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On very large discs, say 20" and above the speed rating (rpm) is usually stenciled onto the side face of the wheel rather then on the blotter or label.
C
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Rank: Super forum user 
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118ncg wrote:???? Ref: Codes on Wheels/ Disc's ??? Currently looking at a abrasive wheel presentation that I recieved from a Major Company, but slightly confused by the idenification markings that are given 27 A 30 R 5 RF 41.and the breakdown.....
I believe it should breaks down like this (I got my breakdown from CITB GE700 module 19) ??
27 = type of Abrasive
A = Nature of Abrasive
30 = Grain size
R = Grade
5 = Structure
RF = Nature of bond
41 = Type of bond, etc .......
Is this correct??
Which part of the above indicates the type of wheel as the presentation I recieved stated it was the first or last numbers..
Hsg 17 states there are a few diffferent wheels that's why I have chosen the number 27 & 41 in the breakdown as they clearly don't mean the same
Would also like guidance on where to find info on speed rating band found on large discs l
Sorry but I always thought that under the 'Abrasive Wheels Regulations' that training needed to be facilitated by a competent person!
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Rank: Forum user 
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118NCG get a qualified trainer in to run a course (not overly expensive)
check they include all you need sit in on the course take notes hand outs etc. then you will have all the Knowledge you need to do your presentation and recieve a cert in the process.
(PM me if need more assistance)
Regards
Frank
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jericho wrote:On very large discs, say 20" and above the speed rating (rpm) is usually stenciled onto the side face of the wheel rather then on the blotter or label.
C
I understand the RPM However I believe you are misreading the question.
Which part of the break down give the type of wheel
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Rank: Forum user
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farrell wrote:118ncg wrote:???? Ref: Codes on Wheels/ Disc's ??? Currently looking at a abrasive wheel presentation that I recieved from a Major Company, but slightly confused by the idenification markings that are given 27 A 30 R 5 RF 41.and the breakdown.....
I believe it should breaks down like this (I got my breakdown from CITB GE700 module 19) ??
27 = type of Abrasive
A = Nature of Abrasive
30 = Grain size
R = Grade
5 = Structure
RF = Nature of bond
41 = Type of bond, etc .......
Is this correct??
Which part of the above indicates the type of wheel as the presentation I recieved stated it was the first or last numbers..
Hsg 17 states there are a few diffferent wheels that's why I have chosen the number 27 & 41 in the breakdown as they clearly don't mean the same
Would also like guidance on where to find info on speed rating band found on large discs l
Sorry but I always thought that under the 'Abrasive Wheels Regulations' that training needed to be facilitated by a competent person!
Would that be a person with Knowledge and experianace of said items. That know about the product as well as the hazards assocaited with the item in my case Disc Cutter. Then is able to utilise this said knowledge and experiance to explain/ teach others in a correct and safe manner. Thus passing on there knowledge and experiance.??? I still need to know what bit indicates the type of wheel..
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The numbers 27 and 41 on the markings show on the wheel show the make up of the abrasive wheel and not what the wheel is designed for.
Abrasive wheel types you can find in HSG17 Safe Use of Abrasive Wheels are;
Type 27 is depressed centre for grinding and is used on angle grinders.
Type 41 is flat for cutting and is used on cross cut saws.
You can down load HSG17 Safe Use of Abrasive Wheels free from the HSE web site, this shows the different types of abrasive wheels.
Regards,
Jim
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Rank: Super forum user
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118ncg wrote:farrell wrote:118ncg wrote:???? Ref: Codes on Wheels/ Disc's ??? Currently looking at a abrasive wheel presentation that I recieved from a Major Company, but slightly confused by the idenification markings that are given 27 A 30 R 5 RF 41.and the breakdown.....
I believe it should breaks down like this (I got my breakdown from CITB GE700 module 19) ??
27 = type of Abrasive
A = Nature of Abrasive
30 = Grain size
R = Grade
5 = Structure
RF = Nature of bond
41 = Type of bond, etc .......
Is this correct??
Which part of the above indicates the type of wheel as the presentation I recieved stated it was the first or last numbers..
Hsg 17 states there are a few diffferent wheels that's why I have chosen the number 27 & 41 in the breakdown as they clearly don't mean the same
Would also like guidance on where to find info on speed rating band found on large discs l
Sorry but I always thought that under the 'Abrasive Wheels Regulations' that training needed to be facilitated by a competent person!
Would that be a person with Knowledge and experianace of said items. That know about the product as well as the hazards assocaited with the item in my case Disc Cutter. Then is able to utilise this said knowledge and experiance to explain/ teach others in a correct and safe manner. Thus passing on there knowledge and experiance.??? I still need to know what bit indicates the type of wheel..
No it would be someone who has been properly trained and appointed by his employer in writing.
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Rank: Super forum user
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farrell wrote:
Sorry but I always thought that under the 'Abrasive Wheels Regulations' that training needed to be facilitated by a competent person!
The Abrasive Wheels Regs were revoked in their entirety by PUWER 1998 so the training requirements of PUWER now apply and the "appointed in writing" provision is no longer explicitly stated for trainers. The trainer still has to be competent to train of course.
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Rank: Forum user
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The speed rating of the wheel is NOT contained in those details. That is why I said that it would be stenciled on the wheel itself. I think that you are confusing the 'attributes' of the wheel with its safe usage. Unless you decide to grind, say magnesium on the wheel which would probably be inappropriate then then really the only applicable information that you need (in terms of safety) is the MOS. The rest is about cut, hardness, bonding etc. The speed doesn't appear as a code. It simply appears as MOS XXXX rpm.
Yes, the regs have been replaced, but the principles of ABR 1970 and accompanying guides still stand as good practice. The law may have changed, but wheels haven't. PUWER does not contain the detail that is required in order to train some one in the use of APs. Quite right that the trainer must be competent. Competent both as a trainer and in the subject matter being given. And I would draw on the old reg for that content.
C
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Rank: Forum user
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If you email me I can send you a BS guide to Abrasive Wheels
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Rank: Forum user
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Jim.Grierson wrote:The numbers 27 and 41 on the markings show on the wheel show the make up of the abrasive wheel and not what the wheel is designed for.
Abrasive wheel types you can find in HSG17 Safe Use of Abrasive Wheels are;
Type 27 is depressed centre for grinding and is used on angle grinders.
Type 41 is flat for cutting and is used on cross cut saws.
You can down load HSG17 Safe Use of Abrasive Wheels free from the HSE web site, this shows the different types of abrasive wheels.
Regards,
Jim
Jim thanks I have already downloaded these prior to my original post.
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Rank: Forum user
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farrell wrote:118ncg wrote:farrell wrote:118ncg wrote:???? Ref: Codes on Wheels/ Disc's ??? Currently looking at a abrasive wheel presentation that I recieved from a Major Company, but slightly confused by the idenification markings that are given 27 A 30 R 5 RF 41.and the breakdown.....
I believe it should breaks down like this (I got my breakdown from CITB GE700 module 19) ??
27 = type of Abrasive
A = Nature of Abrasive
30 = Grain size
R = Grade
5 = Structure
RF = Nature of bond
41 = Type of bond, etc .......
Is this correct??
Which part of the above indicates the type of wheel as the presentation I recieved stated it was the first or last numbers..
Hsg 17 states there are a few diffferent wheels that's why I have chosen the number 27 & 41 in the breakdown as they clearly don't mean the same
Would also like guidance on where to find info on speed rating band found on large discs l
Sorry but I always thought that under the 'Abrasive Wheels Regulations' that training needed to be facilitated by a competent person!
Would that be a person with Knowledge and experianace of said items. That know about the product as well as the hazards assocaited with the item in my case Disc Cutter. Then is able to utilise this said knowledge and experiance to explain/ teach others in a correct and safe manner. Thus passing on there knowledge and experiance.??? I still need to know what bit indicates the type of wheel..
No it would be someone who has been properly trained and appointed by his employer in writing.
The problem here is that the person giving the brief did not understand the breakdown of the code
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