What is that?

As with any industry, coated abrasives has its own terminology.

Often our customer service will indicatethat an order is at a certain operation.

These are some of the most commonly used terms and their definition.

Glossary of Abrasive Terms


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Belt Slitter — Belts less than 12” wide are typically made in a 12” matrix then slit to the final desired width. This improves the efficiency on manufacturing narrow belts.

Butt Splice — A joint where the two ends are butted against each other and fastened together by means of a mylar tape across the back of the joint. A splice which is bi-directional and can be run in either direction. Most narrow belts made at PASCO feature a butt splice.

Closed Coat — Abrasive grains cover 100% of the coated surface. The greater number of abrasive grains normally results in a better finish and a higher amount of stock removal during the useful life of the product. Closed Coat products are widely used in metalworking and woodworking applications.

Cut Roll — Belts 12” in width and less are typically made from 12-1/4 wide rolls. This increases our manufacturing efficiency. After making the 12-1/4 wide belt it is slit to its finished width.

Cut to Length Machine — These machines are used to cut the roll to the desired length for an abrasive belt. The material will be cut at the proper splice angle at this operation.

Die Cutting — Various products made at PASCO involve die cutting. Die cutting involves various presses in operation at PASCO particularly presses involved in manufacturing PSA disc.

Disc-On-Roll — 5” and 6” PSA disc which are wound into a roll eliminating the release liner that is used on other PSA disc.

Disc-With-Tab — 5” and 6” PSA disc which have a tab to permit easy removal of the protective liner on the back of the disc.

Jumbo Roll — Rolls of Coated Abrasives as they are shipped from their manufacturer. A typical Jumbo Roll is 54” wide and 100 yards in length. The length of a Jumbo Roll may vary depending on the type of material. Certain rolls are 1,600 Meters in length (1,750 yards) or greater and some products are available up to 65” wide.

Hot Melt Coater — Adhesive is applied to the back of jumbo for Pressure Sensitive Adhesive (PSA) products.

Lap Splice — Top skived joint may be run in only one direction where the two ends of the belt are overlapped by 1/4”. Each end must be specifically prepared so once the joint is made it is no thicker than the rest of the belt.

Narrow Belt Press — Belts 12” wide and less are pressed in 18 to 25 ton presses at the splice area. This action begins the splice curing process. The belt is pressed for 7 seconds at the 18 to 25 tons per inch at 180˚F. Belts must be allowed to cure for 24 hours after this operation.

Open Coat — Abrasive grains cover approximately 50% - 60% of the coated surface. Open Coat products generally offer greater flexibility, faster cutting, coarser finish and provide a greater resistance to loading. Open Coat products are used widely for woodworking applications.

Pasco Lock Splice — A strong sinusoidally cut joint (wave) which can be run in either direction. Most wide belts made at PASCO feature a butt splice with a Pasco Lock splice. This splice is used mainly to improve finish on wide belt applications.

Roll Slitter — A machine which slits abrasive rolls to a desired width and length. Nearly all rolls must at some time be slit to some width.

Roller Press — Wide belts are prepared in a similar manner to Narrow Belts and the splice area is pressed using a Roller Press. This design permits the required tonnage to be applied with more compact machine than a hydraulic press.

Scuffer/Gluer — Machines which prepare the belt for joining the two ends and apply the adhesive which is used in the splicing operation.

Tacking — Tacking involves applying tape to one end of the belt and then matching both ends of the belt together prior to pressing.

Tape-On-Top Splice — This joint is ONLY for applications with either a platen or steel contact wheel. This provides a bi-directional joint that is thinner than the rest of the belt. This is a splice where a channel has been made in the grain side of the belt for the tape to fit into.

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