Abrasive Belts

Product Overview

GUSHI Silicon Carbide Abrasive Belts use friable SiC grain bonded resin-over-resin to a waterproof X-weight cloth backing, giving a belt that cuts cooler and finer than aluminium oxide on stone, glass, aluminium and other non-ferrous materials. Grits run from P60 for shaping to P1000 for final finishing, in closed coat as standard with open coat and a stearate anti-clogging top coat available. A precision bi-directional tape joint means there is no thickened section at the splice, so the belt runs smoothly in either direction without seam chatter. Standard sizes include 100 × 915 mm and 100 × 610 mm, with custom belts from 10 mm to 1400 mm wide. They are made by Huzhou Gu’s Imp. & Exp. Co., Ltd., a Zhejiang abrasives and diamond tool manufacturer founded in 2004 that is ISO 9001:2015 certified and exports to more than 20 countries.

The reason to specify silicon carbide is the scratch pattern it leaves. Because the grain fractures rather than dulling, it keeps presenting fresh sharp points instead of rubbing, which produces a finer, more uniform finish at the same grit — the practical reason stone and glass finishers stay with SiC even when cheaper abrasives are available.

These belts run wet or dry. On stone, granite and glass, water controls heat and dust and extends belt life substantially; on wood, plastics and light metal, dry sanding avoids the mess and the swelling that water causes. The same belt does both, which is why many workshops standardise on a single waterproof product across materials.

Full Specifications

Why Silicon Carbide Cuts the Way It Does

Friability is a feature, not a weakness

Silicon carbide grains are extremely hard but brittle. Under load they fracture rather than wear smooth, and each fracture exposes a new sharp edge. The belt therefore keeps cutting at close to its original rate for most of its life, instead of progressively rubbing and generating heat the way a dulling grain does. This is why SiC leaves a finer scratch pattern than a nominally identical grit in a tougher mineral.

Heat is what destroys a belt, not friction alone

A belt that stops cutting starts burning: the resin bond softens above roughly 200 °C, grain sheds prematurely, and the workpiece discolours. Sharp SiC grain, an open or stearate-coated surface, correct pressure and — on stone and glass — a little water all work to keep the cut cool. Most premature belt failure is a heat problem that looks like a wear problem.

Backing and bond determine where it fails

On a coated belt the grain rarely wears out first; the bond lets go or the backing tears. X-weight cloth carries the tension of a portable sander and resists edge fraying; Y-weight adds stiffness for heavy wide-belt work; J-weight flexes around profiles and contours. Matching backing weight to machine tension and belt speed is what converts a specification into belt life.

Why the joint matters more than people expect

Every belt has a splice, and a poorly made splice is a lump that hits the workpiece once per revolution, leaving a repeating mark and a vibration the operator feels through the machine. The bi-directional tape joint used here is made flush, so there is no chatter mark and no correct running direction — which also means a belt cannot be ruined by being fitted backwards.

Key Features Explained

Wear resistance beyond aluminium oxide

On the materials SiC is meant for — stone, glass, porcelain, non-ferrous metals — the grain’s combination of hardness and controlled fracture gives longer working life than an equivalent aluminium oxide belt, because it keeps cutting instead of glazing over. The practical result is fewer belt changes per shift and a more consistent finish between changes.

Anti-clogging options for soft materials

Aluminium, rubber, paint and resin tend to pack between the grains and stop the belt cutting. Open-coat construction increases grain spacing, and a stearate top coat acts as a dry lubricant so swarf releases instead of welding to the surface. Both are available, and both cost far less in wasted belts than they cost in specification.

Bi-directional joint

Beyond removing chatter, a direction-agnostic belt removes an entire class of workshop error. Fitting a single-direction belt backwards destroys it within seconds; these cannot be fitted wrongly, which matters in busy shops and on sites with high staff turnover.

Wet or dry on one product

The waterproof backing and resin system let the same belt run wet on granite or dry on timber. Workshops that handle both materials no longer need two inventories, and buyers can consolidate to a single line with fewer size and grit gaps.

Cut-to-size flexibility

Belts are cut from roll stock, so unusual machines are not an obstacle: widths from 10 mm file belts to 1400 mm wide belts, and lengths from 330 mm to 9000 mm. That makes the range viable for distributors serving woodworking, stone fabrication and metal finishing with one supplier.

Grit, Backing and Size Selection Guide

Choose in three steps: material, then grit sequence, then backing and size.

Applications & Suitable Materials

Applications

Suitable Materials

Silicon Carbide vs. Aluminium Oxide vs. Zirconia vs. Diamond

Four abrasives cover almost every job. The right one depends on the material’s hardness and toughness.

Bottom line: Silicon carbide is the right default whenever the material is hard but not steel — stone, glass, porcelain, aluminium, rubber, plastic and wood. Move to aluminium oxide for general-purpose work, zirconia for heavy steel removal, and diamond for concrete and the hardest ceramics.

How to Use: Step-by-Step Guide

1. Confirm the belt size matches the machine exactly — width and circumference, not just width.
2. Pick the abrasive for the material: SiC for stone, glass, non-ferrous, rubber, plastic and wood.
3. Choose the backing weight: X-weight for portable sanders, Y-weight for wide-belt, J-weight for contours.
4. Select the starting grit from the selection table — coarse enough to cut, fine enough not to waste time.
5. Fit the belt in the direction the machine specifies; these joints also run either way without damage.
6. Set belt tracking and tension before the belt touches the workpiece.
7. Start the machine and bring the work to the belt with light, even pressure — let the grain cut.
8. Keep the belt moving; dwelling in one spot burns the resin bond and the workpiece.
9. Run wet on stone and glass to control heat and dust, or use stearate-coated belts dry on soft metals.
10. Progress through grits one step at a time, cleaning the surface between stages.
11. Stop when the scratch pattern is uniform; a belt that glazes or loads should be replaced, not pressed harder.
12. Store unused belts flat in their packaging at room temperature and moderate humidity.

Build a complete abrasives range: Aluminium Oxide Abrasive Sanding Rolls, Diamond Sanding Sheets, and Diamond Hand Polishing Pads.

Frequently Asked Questions

OEM & Wholesale Information

Huzhou Gu’s Imp. & Exp. Co., Ltd. (brands GUSHI Tools and Roycel) has manufactured abrasives, tile installation tools and diamond tools from Zhejiang since 2004, drawing on a supply chain active in this industry since 1998 and a production capacity of 100,000 sets per month. The company is ISO 9001:2015 certified, exports to more than 20 countries including the USA, Germany, the UK, the Netherlands, Brazil, Chile and Australia, and was one of 23 Chinese firms that won the US anti-dumping case on diamond blades at a 6.2% rate.

Continue through the abrasives range: Aluminium Oxide Abrasive Sanding Rolls, Diamond Sanding Sheets, and Triangle Sanding Discs.

WhatsApp: +86 133 2582 1813