3" x 84" Glass Fabrication Sanding Belt, 12 PACK
3" x 84" Glass Fabrication Sanding Belt, 12 PACK
Available in stock (50000)
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Long, narrow wet belt sanders in glass and stone shops run a 3 x 84 belt around a vertical or horizontal platen, with water flooding the contact zone. These silicon carbide belts are converted for that job: seaming, bevelling and flat-finishing glass edges under water at production pace without the grain dulling or the backing coming apart. Eleven grits from 50 through 800 mean the same belt size carries an edge from raw cut to polish-ready.
Each pack holds 12 belts of one grit. We convert them in Anaheim, California on a wet-capable cloth backing, and because 3 x 84 is a machine-specific length we also make custom lengths to order if your sander calls for something slightly different.
- Silicon carbide grain, the standard abrasive for glass, stone, tile and plastics
- Cloth backing built for flood-coolant wet belt sanders; runs dry as well
- Eleven grits from 50 through 800 for seaming through pre-polish
- 84 inch length puts more grain in the water per pass, so the belt runs cooler
- 12 belts of one grit per pack; case pricing for production shops
- Converted in Anaheim, California; custom lengths in about 3 days
Which grit should you load on a 3 x 84 wet belt sander?
All variants are silicon carbide; the choice is grit. Most shops dedicate a machine or a belt change to each stage rather than swapping constantly, so think in stations.
- 50 and 60 grit: the seaming station. Removes score-break, chips and shells on fresh-cut float, mirror and laminated glass, and shapes stone or solid-surface edges.
- 80 and 100 grit: the general edging grit. Clears the coarse scratch and leaves a clean hidden-edge seam or a flat edge ready for refinement.
- 120 grit: the intermediate step on exposed edges. This size skips 150, so go from 120 to 180 rather than stretching 120 straight to 220 on polished work.
- 180 and 220 grit: satin or seamed finish on shelves, table tops and shower glass that will stay matte.
- 320 and 400 grit: smooth matte, and the minimum before a cork belt.
- 600 and 800 grit: pre-polish for edges that will be taken to clear with cerium oxide.
On quartz and granite, 60 to 80 to shape and 220 to 400 before polishing pads. On acrylic, 120, 220, 400 then flame or buff. On fiberglass, 50 to 80 to fair and 120 to 220 to finish.
Grit guide for wet edging glass on a 3 x 84 belt
| Grit | Use it for | Notes |
|---|---|---|
| 50–60 | Seaming, chip removal, shaping | Full water flow, light feed |
| 80–100 | Hidden-edge seam, truing | Removes the coarse scratch |
| 120 | Intermediate refinement | Next step is 180 in this size |
| 180–220 | Satin edge finish | Stopping point for matte edges |
| 320–400 | Smooth matte, pre-polish | Minimum before cork |
| 600–800 | Fine pre-polish | Fastest route to clear polish |
Which machines take a 3 x 84 belt?
- Vertical wet belt sanders used for seaming and flat edging in glass shops, where the operator holds the lite against a vertical platen with water running down the belt.
- Horizontal wet belt sanders and edging benches that take a 3 inch wide, 84 inch long belt.
- Long-bed belt sanders in stone, solid-surface and plastics shops built for this size.
We do not list a specific model for this size; confirm the belt length in your machine manual, and if the manual says 84 inches with a 3 inch width, this belt fits. Check the inside of the belt for a direction arrow before mounting and run it that way. Release tension fully, seat the belt centred on both wheels, re-tension, and jog the machine to set tracking before opening the water valve. On a belt this long, tracking drifts as the belt warms and stretches slightly, so re-check after the first few pieces.
How to get the most out of it
- Open the water before the glass touches the belt and keep a steady flow across the full belt width. Water keeps the edge below the temperature where micro-checks form, floats swarf off the belt, and controls silica dust. Dry running is possible but needs extraction and a fitted respirator.
- Feed light and keep the glass moving. Pressure chips glass and glazes silicon carbide; the belt speed and the grain do the work.
- Use the full belt width. Sweep the edge across the three inches of belt so a groove does not wear in one track.
- Keep the platen clean and flat. Swarf caked behind the belt shows up as a wavy edge.
- Step one grit at a time and rinse the piece between stations; a grain of 60 grit carried onto an 800 belt scratches every piece after it.
- Drain and dry the machine at the end of the shift, and store spare belts hanging or loosely coiled, out of sunlight and damp, so they do not take a set.
Use it for / don't use it for
Use it for
- Seaming, flat edging and bevelling float glass, mirror, laminated and tempered-ready lites
- Shower door, shelf, table top and cabinet glass edges in production
- Granite, marble, quartz and solid-surface edge shaping
- Acrylic, polycarbonate and fiberglass on a long-bed sander
- Ceramic and porcelain tile edges
Don't use it for
- Steel or weld grinding; silicon carbide wears fast on ferrous metal
- Dry glass work without dust extraction and a respirator
- Polishing to clear; use the 3 x 84 cork belt with cerium for that stage
- Machines built for any other belt length; 84 inches must match the manual
When do you switch to the 3 x 84 cork belt?
Silicon carbide takes the edge to a fine matte; the clear polish comes from the 3 x 84 cork belt, which is an ungritted polishing carrier. Finish the silicon carbide sequence at 400 or 800, rinse the glass, mount the cork belt on the same machine, charge it with cerium oxide slurry and run it wet at moderate speed with light pressure. Re-charge when the cut slows. Cork will not remove a scratch coarser than about 400 grit and must never run dry against glass with compound caking on it.
Specifications
| Size | 3 inch x 84 inch |
|---|---|
| Abrasive grain | Silicon carbide |
| Backing | Cloth, wet/dry capable |
| Coat | Closed coat |
| Joint | Check inside of belt for direction arrow before mounting |
| Grits offered | 50, 60, 80, 100, 120, 180, 220, 320, 400, 600, 800 |
| Pack quantity | 12 belts, one grit per pack |
| Wet or dry | Both; wet recommended on glass and stone |
| Fits | Wet belt sanders and long-bed sanders that take a 3 x 84 belt |
| Polishing companion | 3 x 84 cork belt, 8 pack |
| Converted in | Anaheim, California |
| Custom sizes | Made to order in about 3 days |
Frequently asked questions
Can a 3 x 84 silicon carbide belt run under flood coolant all day?
Yes. The grain is bonded to a cloth backing rather than paper, so continuous water on a wet belt sander does not soften it or lift the joint. Wet running is the recommended way to use these belts on glass and stone: it keeps the edge cool, prevents micro-chipping, and keeps silica dust out of the air.
Why is there no 150 grit in the 3 x 84 size?
This size is stocked in eleven grits, 50 through 800, without 150. In practice it makes no difference to the edge: step from 120 to 180, which is a single grade and well within the rule of never skipping more than one grit. If your process specifically needs 150, we can convert it as a custom order.
Which grit gives a satin edge on shower door glass?
A satin or seamed edge is normally finished at 180 or 220 grit. Seam at 60 or 80 to remove the score-break and chips, refine at 120, then finish at 180 or 220 for an even matte edge. If the edge is going to be polished, continue to 400 or 800 before the cork belt.
How do I know when to change the belt?
Change a silicon carbide belt when the cut slows and you find yourself pushing harder, when the edge starts to show heat marks or tiny chips even with water running, or when the scratch pattern becomes uneven. Pushing a dull belt chips glass and costs more in rejected pieces than the belt does.
Will these belts work on granite, quartz or solid surface?
Yes. Silicon carbide is the standard grain for granite, marble, quartz, engineered stone, solid surface and porcelain. Run them wet on the same machine, shape at 60 to 80, refine at 120 to 220, and stop at 320 to 400 before switching to your stone polishing pads. Rinse the machine between stone and glass so grit does not carry over.
Can you make a 3 inch belt in a different length for my sander?
Yes. We convert belts in Anaheim, California and can make a 3 inch wide silicon carbide belt to any length your wet belt sander needs, normally in about 3 days. Send the exact length from the manual or measure an old belt along the inside. Orders over $200 ship free, and unused packs can be returned within 30 days.
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