The best 36 grit sanding belt depends on your sander size and material: choose the IVY Classic 3 x 21-inch belt for general-purpose sanding, the 3M Cubitron II 1/2 x 18-inch belt for metalwork, or the Demissle 8 x 19-inch belt for floor refinishing. HARFINGTON offers a 10-pack in the common 3 x 21-inch size, while Red Label Abrasives supplies a 20-pack of narrow air-file belts. Confirm belt dimensions and machine requirements before ordering.
| Product | Size | Best for |
|---|---|---|
| IVY Classic Flex-Abrasive | 3 x 21 inches | General-purpose sanding |
| 3M Cubitron II File Belt | 1/2 x 18 inches | Fast metal removal |
| HARFINGTON Sanding Belts | 3 x 21 inches | Multi-belt woodworking supply |
| Demissle Floor Sanding Belt | 8 x 19 inches | Drum-sander floor refinishing |
| Red Label Abrasives Air File Belts | 1/2 x 18 inches | Weld removal and narrow work |
IVY Classic 3 x 21-Inch 36 Grit Belt
The IVY Classic 43060 is a 10-pack of 3 x 21-inch belts with extra-coarse 36 grit aluminum oxide on resin cloth. Its listed applications include sanding and finishing wood, metal, plastic, and fiberglass, as well as blending welds. The diagonal lap splice is designed to reduce the raised feel of a belt joint while sanding.
Best for: Buyers who need a versatile belt for a compatible 3 x 21-inch sander and expect to work across several material types. It stands out for its stated multi-material use and pack of 10.
Keep in mind: The belt must be run in the direction indicated by its arrow. Check your sander’s required belt dimensions and direction before use; the listed size will not fit machines designed for other dimensions.
3M Cubitron II 1/2 x 18-Inch File Belt
This 3M Cubitron II 786F package contains 10 resin-bonded file belts measuring 1/2 x 18 inches. The product is listed as 36+ grade and intended for spot-weld removal. Its features describe fast cutting for hard metal, along with cleaning, stripping, and deburring applications. The manufacturer also states that this abrasive cuts faster and lasts longer than other premium abrasives.
Best for: Metalworkers who need a narrow belt for a compatible file-belt tool and prioritize fast material removal. The small width is useful for focused work where a standard wide belt may be impractical.
Keep in mind: This is a specialized 1/2 x 18-inch belt, not a replacement for a 3 x 21-inch bench or handheld sander belt. Verify that your tool accepts this exact size and belt type.
HARFINGTON 3 x 21-Inch 36 Grit Belts
HARFINGTON’s package contains 10 aluminum oxide belts in 3 x 21-inch dimensions and 36 grit. The product description cites woodworking, metal polishing, and knife sharpening among its uses. It also describes an electrostatic coating process intended to help keep abrasive particles in place and a diagonal overlapping joint designed to reduce a bump at the seam.
Best for: Buyers seeking a multi-belt supply in a 3 x 21-inch format for a compatible sander. The stated dimensions, 10-piece quantity, and aluminum oxide abrasive make it a direct option to compare with the IVY Classic pack.
Keep in mind: Its suitability depends on your tool accepting 3 x 21-inch belts. The listed uses cover several tasks, but the product details do not specify performance on every material or in every machine.
Demissle 8 x 19-Inch Floor Sanding Belts
Demissle supplies 10 heavy-duty 8 x 19-inch belts made with open-coat aluminum oxide and rated at 36 grit. The product is designed for drum floor sanders and described for commercial and residential floor sanding. Its stated uses include removing old finish, glue, and coatings. The listed material properties include wear resistance, anti-static performance, and resistance to moisture and heat.
Best for: Floor-refinishing buyers whose drum sander calls for an 8 x 19-inch belt. Its larger dimensions and floor-sanding purpose distinguish it from the narrow file belts and smaller general-purpose belts in this comparison.
Keep in mind: The listing says the belts fit most commercial and residential sanding machines, but machine dimensions vary. Check your drum sander’s manual and confirm the required belt size rather than relying on the broad fit description.
Red Label Abrasives 1/2 x 18-Inch Belts
This Red Label Abrasives package contains 20 aluminum oxide air-file belts measuring 1/2 x 18 inches. The product title identifies the belts as 36 grit, while the description highlights weld removal, metal grinding, woodworking, and knife sharpening. It specifies blue-fired, closed-coat aluminum oxide with a grinding aid intended to reduce heat and buildup. Listed metal applications include ferrous and non-ferrous materials.
Best for: Buyers who need a larger pack of narrow belts for a compatible air file or other tool that accepts 1/2 x 18-inch belts. The listed metalworking applications make it a useful comparison for weld and deburring tasks.
Keep in mind: The description also refers to “80 grit” despite the product title identifying 36 grit. Confirm the delivered product’s grit designation with the seller before purchasing if the exact grit is essential to your work.
Buying Guide: How to Choose a 36 Grit Sanding Belt
Which belt size fits your sander?
Match the belt’s length and width to the tool’s specified belt size. These measurements are not interchangeable: 3 x 21-inch belts are intended for tools that accept that format, while 1/2 x 18-inch belts are narrow file belts and 8 x 19-inch belts are intended for certain drum floor sanders. Check the machine label or manual before ordering, and compare both dimensions rather than relying on the product name alone.
Also check whether your machine specifies a belt direction. Some belts have an arrow showing the required direction of travel. The IVY Classic listing specifically instructs users to sand in the direction of its arrow.
Is 36 grit right for the job?
Grit describes how coarse the abrasive is. A 36 grit belt is an extra-coarse option in this group, suited to tasks where quick, aggressive removal is more important than producing a smooth final surface. The listed applications include removing old floor finish, blending welds, and grinding or deburring metal. For finish sanding, a finer grit is generally used after coarse material removal; select it according to the material and the finish you need.
Because coarse abrasives can remove material quickly, use appropriate pressure and check progress often. Test on a small or inconspicuous area when the workpiece allows, especially if preserving a thin surface layer or maintaining a precise shape matters.
Which abrasive material and coating should you compare?
Aluminum oxide appears in the IVY Classic, HARFINGTON, Demissle, and Red Label product descriptions. The 3M listing instead emphasizes its Cubitron II abrasive technology. Product construction also varies: Red Label specifies closed coat and a grinding aid, while Demissle describes open-coat aluminum oxide. Those details can help narrow options, but choose based on the manufacturer’s stated application and your tool rather than assuming one construction is best for every task.
How many belts should you buy?
Pack quantity matters when coarse belts will be used for repeated removal work. The listed packages contain 10 belts for IVY Classic, 3M, HARFINGTON, and Demissle, and 20 for Red Label. A larger pack can reduce the need for frequent reordering, but only if the belt size and intended use match your equipment. Consider the work area and likely replacement frequency before choosing quantity.
What should you check before sanding?
- Confirm the belt dimensions and tool requirements.
- Inspect the belt for damage and follow any directional arrow.
- Use the belt only for a material and task described by the product information.
- Wear suitable eye and respiratory protection, and follow the tool manufacturer’s safety instructions.
- Stop if the belt slips, tracks poorly, or shows damage, and check the machine setup before continuing.
Frequently Asked Questions
What is a 36 grit sanding belt used for?
A 36 grit belt is a coarse abrasive used for aggressive material removal. The products listed here describe uses such as weld blending or removal, metal grinding, and removing old floor finish, glue, or coatings.
Can I use any 36 grit belt on my sander?
No. The belt must match your sander’s required length and width, and some tools require a specific belt type or direction. A 1/2 x 18-inch file belt, for example, is not the same size as a 3 x 21-inch belt.
Are 36 grit belts suitable for finishing?
They can be used for coarse sanding or initial material removal, but they are generally too coarse to leave a smooth final surface. Many projects need one or more finer grits afterward.
Which option is intended for floor sanding?
The Demissle 8 x 19-inch belt is specifically described for drum floor sanders and floor refinishing. Confirm that your machine requires this exact belt size before buying.
What does 36+ grade mean on the 3M belt?
The 3M product is listed as 36+ grade, indicating a grade designation that is not written exactly the same way as a plain 36 grit label. Compare tool fit and the manufacturer’s application details if you need a precise grit match.
Why do sanding belts have a seam?
A belt is joined at a seam to form a continuous loop. Some listed products use a diagonal overlapping splice intended to reduce the bump at the joint, but the seam still needs to be installed and used according to the product instructions.
