3" x 90" Sanding Belts, 4 PACK

Ninety inches of 3" belt is an edge sander length: the long loop on small oscillating edge sanders and compact stroke sanders that spend most of each revolution cooling off, which is why a 3" x 90" belt runs cooler and lasts longer than a bench belt doing the same job. We stock this size for the shops that run those machines on metal as much as wood, so the options are Ceramic, Zirconia, Zirconia+ (Grinding Aid) and Cloth A/O.

Fabricators use the zirconia and ceramic belts for deburring plate, tube and extrusion edges; cabinet and millwork shops use the aluminum oxide belts for door and panel edges. Converted in Anaheim, California, four belts to a pack, 24 through 600 grit, all on cloth that runs wet or dry.

• Edge sander length: a 90" loop runs cooler and lasts longer than a short belt
• Ceramic and zirconia for steel and stainless edges; Cloth A/O for wood and fine grits
• Zirconia+ grinding-aid belt keeps stainless and aluminum edges from heat-tinting or loading
• 24 through 600 grit, from weld and saw-mark removal to a pre-finish graining
• Four belts per pack; poly-cotton and Y-weight polyester backings, wet or dry
• Converted in Anaheim, California; free shipping on orders over $200

Which 3" x 90" belt should you choose for your edge sander?

The right grain depends on what rides against the platen most of the day.

• Cloth A/O: the woodworking belt and the finishing belt. Aluminum oxide cuts hardwood, plywood, MDF and plastics cleanly at edge-sander pressure without tearing the grain, and it is the only option we carry above 120 grit, so every 150 through 600 belt in this size is aluminum oxide. Poly-cotton cloth, wet or dry.
• Zirconia: for steel plate, tube and bar edges and for heavy hardwood removal. The grain self-sharpens under moderate-to-heavy pressure and runs cooler than aluminum oxide on metal. Stocked 24 through 120 on a Y-weight polyester-cotton backing.
• Zirconia+ (Grinding Aid): zirconia with a topical grinding aid over the one already in the resin. The extra lubricant lowers heat at the contact line, which keeps stainless edges from bluing and stops aluminum extrusions packing the belt. Y-weight polyester, wet or dry.
• Ceramic (Shredder): the orange-red belt for stainless, hardened steel and high-alloy edges on an edge sander with enough rigidity and power to load it. Its grain renews its cutting edges continuously, so it removes stock faster and cooler than zirconia for most of its life.

Grits differ by grain and the selector shows what is in stock. A shop that runs both wood and metal on one edge sander should keep separate belts for each and never let steel swarf reach the wood belt.

Grit guide for edge sanding wood and metal

What machines take a 3" x 90" belt?

We have not verified individual models for the 3" x 90" size, so match the width and length in your manual before ordering. This length is found on:

• Small oscillating edge sanders built around a 3" wide belt, the benchtop and compact floor machines used for door edges, face frames and small metal parts.
• Compact stroke sanders where a 3" belt runs between two drums and the operator presses a pad onto the belt.
• Shop-built long-bed belt grinders whose drum spacing gives a 90" loop.

Mounting: release tension, slide the belt over both drums with the grain out, check the inside of the belt for a direction arrow before mounting and point it the way the belt runs, re-tension, then rotate by hand and adjust tracking until the belt sits centered on the platen. Long belts wander more than short ones, so re-check tracking after the first minute under load. Other 3" lengths are made to order in about 3 days.

How to get the most out of it

1. Keep the table square to the platen and check it after each belt change; on a long belt a small error shows as a taper along the whole edge.
2. Feed against the belt direction with steady, moderate pressure and keep the part moving. Stopping to fix a spot dishes the edge on wood and blues stainless.
3. Use the oscillation if the machine has it; it spreads wear across the belt height and stops a groove forming at the table line.
4. Match pressure to grain. Lean on zirconia and ceramic so they fracture and stay sharp; ease off with aluminum oxide on wood so it cuts rather than burns.
5. Lubricate aluminum with a grease stick on the running belt, or run wet where the machine allows it, and use the Zirconia+ belt in the coarse grits.
6. Clean loaded belts with a crepe rubber belt eraser and keep dust extraction on; loading is why a long belt seems to wear out early.
7. Separate wood and metal dust. Sparks and fine wood dust in one collector is a fire risk.
8. Store belts hanging in their coil, away from humidity, and let a cold belt warm up before running it.

Use it for / don't use it for

Use it for

• Truing and squaring cabinet door, drawer front and panel edges (Cloth A/O)
• Deburring and chamfering steel plate, tube and laser-cut parts (zirconia, ceramic)
• Edge finishing aluminum extrusions and sheet without loading (Zirconia+, A/O)
• Directional graining on stainless trim and brackets
• Edge work on MDF, plastics and solid surface

Don't use it for

• Zirconia or ceramic on wood edges; they tear and burn, use Cloth A/O
• Ceramic on a light-duty edge sander that cannot load it
• Grits finer than 220 on wood before stain; the edge burnishes
• Sanding panel faces; the platen is for edges
• Running against the direction arrow or with a lifted joint

Specifications

Frequently asked questions

Related products and guides

• All sanding belts
• 3" x 118" Sanding Belts, 4 pack for longer edge sanders
• 3" x 132" Sanding Belts, 4 pack
• Grease stick for sanding aluminum and non-ferrous metals
• Custom sanding belts made to order in about 3 days