4" x 84" Glass Fabrication Sanding Belt, 9 PACK
4" x 84" Glass Fabrication Sanding Belt, 9 PACK
Available in stock (50000)
Check return eligibility and fees
Floor-standing upright wet belt sanders, the tall machines a glass shop stands a full lite against, run a 4 x 84 belt with water sheeting down the platen. These silicon carbide belts are converted for that class of machine: a four inch face for flat edging and bevels on large shower doors, table tops and storefront lites, in eleven grits from 50 through 800, on a cloth backing that shrugs off continuous water.
An 84 inch belt carries a lot of grain, so each grain does less work per revolution and the belt stays cooler and lasts longer than a short belt at the same feed. Packs hold 9 belts of one grit, which suits a machine that keeps a coarse and a fine belt in rotation. We convert these in Anaheim, California and make other lengths to order.
- Silicon carbide grain for glass, mirror, stone, tile and plastics
- Cloth backing built for continuous water on upright wet belt sanders
- Eleven grits, 50 through 800, from seaming to pre-polish
- Four inch face keeps long edges on large lites flat and bevels straight
- 9 belts of one grit per pack; case pricing available
- Converted in Anaheim, California; custom lengths in about 3 days
Which grit should you run for large-lite edging on a 4 x 84 belt?
All variants are silicon carbide, so the choice is grit. On an upright sander handling big pieces, most shops keep a coarse belt for seaming and a medium or fine belt for finish and change between them by job.
- 50 and 60 grit: seaming raw cut edges on thick lites, removing chips and shells, roughing a bevel, shaping stone and solid surface.
- 80 and 100 grit: the general edging grit; clears the coarse scratch and gives a clean hidden-edge seam on shower door and storefront glass.
- 120 grit: refining exposed edges. There is no 150 in this size, so the next step is 180.
- 180 and 220 grit: satin or seamed finish on table tops, shelves and mirrors that stay matte.
- 320 and 400 grit: smooth matte and the minimum before a cork belt.
- 600 and 800 grit: pre-polish for edges going to cerium oxide.
On granite and quartz, 60 to 80 to shape and 220 to 400 before polishing pads. On acrylic sheet, 120, 220 and 400 then flame or buff. On fiberglass panels, 50 to 80 to fair and 120 to 220 to finish.
Grit guide for glass on a 4 x 84 upright wet belt sander
| Grit | Use it for | Notes |
|---|---|---|
| 50–60 | Seaming thick lites, chips, rough bevel | Full water flow, light feed |
| 80–100 | Hidden-edge seam, truing | Removes the coarse scratch |
| 120 | Exposed edge refinement | Next step is 180 in this size |
| 180–220 | Satin 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 4 x 84 belt?
- Upright (vertical) wet belt sanders for glass, the floor-standing machines with a tall platen, water feed and a slotted table or rest for large lites.
- Horizontal wet belt sanders and long-bed edging machines built for a 4 inch by 84 inch belt.
- Stone, solid-surface and plastics belt grinders of the same size.
We do not list a specific model for this length; confirm the size in the machine manual or measure an old belt along its inside. Check the inside of the new belt for a direction arrow before mounting and run it that way. Release tension fully, seat the belt centred on both wheels, re-tension, then jog the machine and set tracking before opening the water. Long belts drift a little as they warm and wet through, so re-check tracking after the first few pieces.
How to get the most out of it
- Water on before glass on. Open the flow across the full belt width first. Water keeps the edge below the temperature where micro-checks form, floats swarf off the belt and controls silica dust. If you must run dry, use extraction and a fitted respirator.
- Support the lite properly. Rest large pieces on the table or rollers so their weight is not bearing on the belt; the belt should only see light, even hand pressure. Pressure chips glass and glazes silicon carbide.
- Move the glass, not the pressure. Steady overlapping passes along the edge with no dwell at corners. Use the full four inch face so the belt wears evenly.
- Bevels: set the angle against the rest and hold it for the whole pass; any rock shows as a wavy bevel line on a long edge.
- Step one grit at a time and rinse the lite between belts so coarse grit never rides onto a fine belt.
- Flush the machine at shift end, change cloudy water, and store spare belts hanging or loosely coiled, out of sunlight and away from damp.
Use it for / don't use it for
Use it for
- Seaming and flat edging large float, mirror, laminated and pre-temper lites
- Shower door, storefront, partition and table top edges
- Bevel grinding on thick decorative glass
- Granite, marble, quartz and solid-surface edge shaping
- Acrylic, polycarbonate and fiberglass sheet
- 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 extraction and a respirator
- Polishing to clear; use the 4 x 84 cork belt with cerium oxide
- Machines built for other lengths; 84 inches must match the manual
Silicon carbide or cork: which 4 x 84 belt do you need?
Both belts are sold in this size and they do different jobs. The silicon carbide belt on this page grinds: it seams, shapes, bevels and takes the edge to a fine matte. The 4 x 84 cork belt polishes: it carries no grain of its own, is charged with cerium oxide slurry and run wet at moderate speed with light pressure to bring a 400 to 800 grit edge to clear. Cork will not remove a scratch coarser than about 400 grit, and it should never run dry against glass with compound caking on it. A polished-edge station needs both.
Specifications
| Size | 4 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 | 9 belts, one grit per pack |
| Wet or dry | Both; wet recommended on glass and stone |
| Fits | Upright and horizontal wet belt sanders that take a 4 x 84 belt |
| Polishing companion | 4 x 84 cork belt, 6 pack |
| Converted in | Anaheim, California |
| Custom sizes | Made to order in about 3 days |
Frequently asked questions
Is this a cork belt or an abrasive belt?
This is the silicon carbide abrasive belt, the one that grinds and finishes the edge. The 4 x 84 cork belt is a separate product used after it, charged with cerium oxide, to polish a 400 to 800 grit edge to clear. Both are listed under glass fabrication abrasives and both fit the same upright wet belt sander.
Can I run these belts under continuous water on an upright sander?
Yes. The silicon carbide grain is bonded to a cloth backing, not paper, so continuous water on an upright or horizontal 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 controls silica dust.
Which grit should I use to seam a large shower door lite?
Seam at 80 or 100 grit for an edge that will sit in a channel or hinge; it removes the sharp arris and chips in one or two passes on a 4 x 84 belt. For an exposed edge, follow with 120 and then 180 or 220 for an even satin finish. Support the lite on the table and keep it moving with light pressure.
Why does a longer belt last longer?
An 84 inch belt has far more grain around its loop than a short belt, so each grain contacts the glass less often per minute, sheds heat between contacts and wears more slowly. Combined with water, that is why upright wet sanders with long belts hold their cut and finish longer than short-belt machines at the same feed.
Why is 150 grit missing from the 4 x 84 range?
This size is stocked in eleven grits from 50 to 800 without 150. Stepping 120 to 180 is a single grade and keeps within the rule of never skipping more than one grit, so the finish is unaffected. If your written process specifies 150, we can convert it as a custom order in about 3 days.
How many belts come in a pack and can I get case pricing?
Each pack holds 9 belts of one grit. Orders over $200 ship free, and unused belts in original packaging can be returned within 30 days. For case quantities, mixed-grit orders or a standing order for a production shop, call 714-646-3299 or email sales@maverickabrasives.com.
Related products and guides
Couldn't load pickup availability
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
