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GRINDING WHEELS Typical Grinding Wheel Marking

“38A” ALUMINIUMM OXIDE ABRASIVE

GRADE

VITRIFIED BOND

S TYPE VITRIFIED BOND

GRAIN SIZE STRUCTURE

GRAIN SIZES USED IN GRINDING WHEELS COARSE

MEDIUM

FINE

VERY FINE

10

30

70

220

12

36

80

240

14

46

90

280

16

54

100

320

20

60

120

400

150

500

180

600

24

GRADES OF HARDNESS USED IN GRINDING WHEELS VERY SOFT

SOFT

MEDIUM

HARD

VERY HARD

DEFG

HIJK

LMNO

PQRS

TUVWX

Many Grinding wheels are manufactured for specific applications. These are manufactured in many Saint-Gobain plants around the world. Please contact us for your specialised needs.

( 09 ) 834 7119

Free Fax 0800 40 40 44

sales.nz@saint-gobain.com

INFORMATION

38A46 J8VS

GRINDING WHEELS Handling, Storage and Inspection of Grinding Wheels

(a)

Handle wheels carefully to prevent dropping or bumping.

(b)

Do not roll wheels (hoop fashion)

(c)

Use trucks or suitable conveyors which will provide proper support for all transportation of wheels which cannot be carried by hand.

Exception to (b) and (c): Where it is impractical to comply with (b) and (c) because of large size of wheel, danger when rolling wheel will be minimized if floor is smooth, clean and free from obstructions. The use of a strip of rubber or cork matting will further reduce the danger.

STORAGE: Suitable racks, bins or drawers shall be provided to accommodate the various types of wheels used.

Storage areas should not be subject to extreme temperatures or humidity, and should always be kept dry (this applies particularly to organic bonded wheels.).

INSPECTION: Immediately after unpacking, all wheels shall be closely inspected to make sure that they have not been injured in transit or otherwise. As an added precaution, wheels should be tapped gently (while suspended) with a light implement, such as the handle of a screwdriver for light wheels or a wooden mallet for heavier wheels. If they don’t have a clear ring tone, they should not be used..

Wheels must be dry and free from sawdust when applying the test, otherwise the sound will be deadened. It should also be noted that resin bonded wheels do not emit the same clear, metallic ring as do vitrified grinding sheets.

( 09 ) 834 7119

Free Fax 0800 40 40 44

sales.nz@saint-gobain.com

INFORMATION

HANDLING: All grinding wheels are breakable and some are very fragile. Great care shall be exercised in handling and storage to prevent damage which might cause a wheel to fly apart when brought up to speed.

The following rules, which are based on experience, shall always be observed: