There are four major categories of abrasive sanding-belt material in common use: Aluminum Oxide, Zirconia (aka Zirconia Alumina), Silicon Carbide and Ceramic. Here’s how to choose the right one for your grinding.
When selecting the best sanding belt for your grinder, it is essential to consider the material type, grit size, and the specific application. Aluminum Oxide is ideal for general-purpose grinding, while Zirconia offers superior durability for heavy-duty tasks. Silicon Carbide is recommended for working with harder materials, and Ceramic belts are suitable for high-performance applications requiring aggressive material removal. By understanding these characteristics, you can effectively determine how-to choose the appropriate sanding belt for your needs.
Belt materials
Aluminum Oxide
Aluminum Oxide is a very common and relatively cheap belt. It works well on hard and soft woods, non-ferrous metals like aluminum, and even most grades of steel.
Zirconia
Zirconia is a man-made material that is very hard and works well where high heat occurs from sanding hard materials, especially in heavy-removal applications. It’s used for rough sanding or shaping of steel and stainless steel.
Silicon Carbide
Silicon Carbide is sharp and brittle. Most commonly found on wet & dry sanding sheets, it’s used for sanding glass, plastic and ceramic, and is popular in the very high grits for fine finishing on metal.
Ceramic
Ceramic belts use a specially heat-treated aluminum-oxide grain that is extremely hard. Ceramic costs more, but it lasts longer than aluminum oxide and works really well to shape and grind hard metals like stainless steel and tool steel. VSM Ceramic Plus belts are made in Canada and are great for knife makers. Most ceramic belts are used in the lower grits, 36 to 120.
Choosing your grit
- 16, 24, 36, 40, 50 & 60 grit — material removal and rough shaping.
- 80, 100 & 120 grit — smoothing surfaces and removing imperfections.
- 150, 180, 220, 240, 320, 400, 600, 800 grit and up — final finishing.
Backing material
There are two categories of backing material for sanding belts: paper and cloth.
- Paper backing — typically about 25% cheaper than cloth. The weight is identified by a letter, usually “E-Weight” or “F-Weight”.
- Cloth backing — the most durable and versatile. The weight is identified by a letter; the further into the alphabet, the heavier the backing.
Cloth-backing weights you’ll see:
- J-Weight — light and flexible; suits sanding over contours.
- X-Weight — medium weight; good for general-purpose use.
- Y-Weight — heavy-duty; the most strength for the pressure of heavy sanding and stock removal.
Wet and dry sandpaper
We also sell wet & dry sandpaper sheets in starter packs. These VSM wet/dry sheets are great for hand-sanding your metal to a finish.
Shop sanding belts
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Wet/Dry Sandpaper Sheets
Price range: $1.00 through $16.00 Select options This product has multiple variants. The options may be chosen on the product page -
VSM Aluminum Oxide Belts
Price range: $5.50 through $6.00 Select options This product has multiple variants. The options may be chosen on the product page -
VSM Ceramic Plus Belts
Price range: $9.75 through $127.00 Select options This product has multiple variants. The options may be chosen on the product page -
Starter Pack – VSM Ceramic Plus Belts
$99.75 Add to cart -
VSM Actirox 2×72 Belts 36 grit
$19.50 Select options This product has multiple variants. The options may be chosen on the product page -
VSM 1×72 Scalloped Edge Belts
$5.25 Select options This product has multiple variants. The options may be chosen on the product page -
VSM 2×72 Scalloped Edge Belts
$6.00 Select options This product has multiple variants. The options may be chosen on the product page -
Belt Cleaning Stick
$12.95 Add to cart
Frequently asked questions
Which sanding belt is best for knife making?
For hardened knife steels, ceramic belts remove material fast and stay cool — most makers reach for them first. Aluminum oxide is a good budget choice for wood and lighter metal work, and wet/dry silicon carbide sheets handle the high-grit hand finishing.
What grit should I start with?
Start coarse for shaping — 36 to 60 grit — then step through 80 to 120 to smooth, and 150 grit and up for finishing. Don’t skip too many grits at once or you’ll spend longer chasing scratches.
What’s the difference between paper and cloth backing?
Paper backing is roughly 25% cheaper and fine for lighter sanding. Cloth backing is far more durable and flexible — J-weight bends over contours, X-weight is general purpose, and Y-weight takes the hardest, heaviest grinding.
Why do ceramic belts cost more than aluminum oxide?
Ceramic grain is specially heat-treated and self-sharpening, so it cuts faster and lasts significantly longer on hard steels. The higher price per belt is usually offset by fewer belts used and quicker grinding.
For more information, please see Nexus Grinders or VSM Abrasives Canada.