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Head Office
Graha Indah Block C4/12 Pondok Gede, Bekasi 17422 - West Java Indonesia +62 21 847 2918
Branch Office
> Gempol Citra Asri Block I/28 Pasuruan East Java Indonesia +62 819 3848 4837
> Perumahan Griya Argo Kencana 41 Kel, Candirejo - Ungaran Semarang Central Java Indonesia +62 811 541 351
Graha Indah Block C4/12 Pondok Gede, Bekasi 17422 - West Java Indonesia +62 21 847 2918
Branch Office
> Gempol Citra Asri Block I/28 Pasuruan East Java Indonesia +62 819 3848 4837
> Perumahan Griya Argo Kencana 41 Kel, Candirejo - Ungaran Semarang Central Java Indonesia +62 811 541 351
| · | Glue - used on both layers (glue over glue and usually results in the smoothest or finest finishes. |
| · | Glue and Filler - this is a fine filler added to animal hide glue, producing a bond both durable and strong. |
| · | Resin over Glue - Glue is used for the first (bond) coat and a synthetic resin for the second (size) coat. This bond has better heat resistance than glue. |
| · | Resin over Resin - The synthetic resin is used for both coats and thus produces a bond which is the toughest, strongest and has the greatest resistance to heat. |
| · | Waterproof - This bond consists of a synthetic resin used for both coats on a waterproof backing. This permits the use of water or other liquid lubricants with the coated abrasive. |
| · | Closed Coat - refers to coating in which the entire surface of the backing is covered by abrasive grain, with no voids between -pieces. This is by far the most general in use and permits the greatest degree of stock removal. |
| · | Open Coat - refers to coating in which 50% to 70% of the backing is covered by abrasive grain. There are voids between pieces of grain. This is used to prevent the small chips removed by the abrasive from building up on the abrasive and thus "choking'! the effective use of the coated material. Use of an open coat material, if recommended, is generally in the coarse grit applications. |
| · | Mounted Flap Wheels - Gp1 |
| · | Flap Discs - Gp2 |
| · | Flap Wheels Un-mounted - Gp3 |
| · | Grinding/Radial Wheels - Gp4 |
| · | Flexible Discs - Gp5 |
3. COATED ABRASIVES - ADHESIVE BONDS
The third basic raw material used in the manufacture of coated abrasives is the bond. There are two layers of adhesives that anchor and lock the mineral to the backing. The first layer of adhesive is applied to the cloth then the abrasive is applied to that layer and locked on with a top layer of adhesive. There are basically five types of bonds used.
4. COATED ABRASIVES - COATINGS
There are two basic types of coatings: closed coat and open coat.
5. FLEX - COATED ABRASIVES
Coated abrasives are stiff, when manufactured, due to the hardness of the bond. The stiffest combination is Resin over Resin on X weight backing. The most flexible, as manufactured, is Glue over Glue on J weight backing.
Most uses require a controlled flexing of the coated abrasive, base on the contour of the object to be polished and the diameter and size of the contact wheel. The polishing of a flat object with a hard, large diameter contact wheel requires little or no flex. A very irregularly contoured object polished on a small or soft contact wheel will require a very flexible coated abrasive to permit the abrasive to follow the contour. Flexing of the coated abrasive decreases its polishing life; therefore, no more flex should be requested than is required for its specific use.
Considering the vast and diversified range of abrasive applications existing today, as well as many which undoubtedly will be conceived as we approach the year 2007, it would be impossible to engineer a single product or even an entire product line which would satisfy this ever-growing demand for specific abrasive tools.
It is for this reason that, during the past decade, Graha Polisher Abrasive has focused on the development and refinement of products for specific industry needs. Rather than attempting “FULL LINE” market saturation, our commitment has resulted in the compilation of the industry’s finest abrasive cut-off wheels available for use on most portable power tools in today’s market. These abrasive wheels, formulated with hybrid engineered resins and synthetic abrasive, provide the highest performance for a wide range of cutting applications-from power plant construction and aircraft fabrication to the needs of maintenance and job shops, and even to the home hobbyist. Quality and high performance are coupled with cost efficiency. Graha Polisher Abrasive products are competitively priced and deliver superior performance and durability.