Creating a living knife or hobby, an explosive fabric on a belt can have a huge impact on creating an elegant and beautiful edge. There are several machines to choose from, some are more suitable for some manufacturing processes than others. In this blog, we compare some of the most popular knife sizes – highlighting their pros, cons, and recommended uses.

Belt Grinders 2X72

For the production of professional knives, 2 x 72 tires are considered the industry standard. This size is suitable for most cutting belts made specifically for North American knives. The devices are compatible with a wide range of strip materials and are surprisingly compact in terms of performance levels. Other accessories are also available for 2×72 cars, including:

Wheel accessories in sizes from 1/4 “to 16”, such as fillers, hollow grinders, and more.

Polishing equipment for cleaning smooth and flat surfaces.

Convex for grinding rotating plates and relieving the dreaded fear of the “J-weight belt”.

72-inch belt length reduces wear and heat so it can be used in all phases of knife production, from the initial steps through knife grinding to final details such as grinding and polishing. Since the machine has a larger working range and often a variable speed motor, you can produce blades faster with 2×72 than with smaller grinders.

The biggest disadvantage of the 2×72 belt is the price. The knife is worth investing in a professional manufacturer, but if you are a fan or a beginner, it may make sense to buy a smaller grinder, such as a 2×42, first.

Red Label abrasives sell a 2×72 sandstone belt. Choose excellent ceramic powder blocks for longer tire life, Edgecore ceramic grinding for excellent results, fine grinding, and polishing, etc.

What is our favorite 2 x 72-inch sander? Look at Brodbeck Ironworks!

Belt Grinders 1X30

Wallets with a 1×30 belt are an excellent tool for finishing and large investments. It is used for knife sharpening and precise work, but the 1-inch belt is not wide enough for the material to be effectively leveled on larger knives (some mills have a 6-inch plate grinder to help with this step). Because it is only 30 centimeters long, it has a less corrosive surface and therefore does not reduce heat, and the tire can be replaced more often. Limited strength and breathability can also make it difficult to handle thicker materials, such as surface belts.

If you buy 1×30, you need a quality abrasive to achieve maximum machine operation. Abrasives Red Label sells packages with 1 x 30-grain grinding strips in the thickness and ultra-fine range and offers long-term options for grinding, grinding, and smoothing knives.

Belt Grinders 1X42

Washing tape 1×42 has abrasive 1×30. The grinding surface is slightly larger and the machines have lower costs. Many professional wall manufacturers use 2×72 and 1×42 grinders in their workshops.

1×42 belts work well for precise work and sharp knives. You can use a belt sander to sharpen surfaces, make profiles and perform most of the first steps in knife development, but less engine power and a smaller 1×42 grinding surface provide better equipment for 2×72 grinders to make the blades faster.

In many cases, it is best to go with a 2×42 sander for a 1×42 sander. Wide tires provide greater durability, and 2×42 grinders have the same price.

2X42 Belt Grinders

2×42 crushers are usually designed for the wood industry market and have a 6-inch grinder. They still work well in the production of knives and are very popular among hobby knife manufacturers who have just started and need flat grinding. 2×42 belt offers greater durability than 1×30 and 1×42 belts. The 6 ” dial can be very handy for smaller tasks, especially by adjusting the angle of the weight of the front blade.

The main disadvantage of 2×42 grinders is that they have an engine with 1/3 horsepower. The slower motor is lowered by grinding, which can limit the grinding capacity.


2×48 paper shredders can be a great alternative to 2×72 paper shredders. It is used by professionals and fans. Sandals with a 2×48 strap often have a larger car than many other small sandals. Moles can also be quite affordable, starting at around $ 330. Due to their compact size, these machines fit well in a small workshop.


Belt grinders 4×36 are not on this list, not because they are suitable for making knives, but because we want to pay attention to them. 4×36 belt sander is very common as it can be found in most hardware stores.

These grinders are good for woodworking, but not very suitable for most knives. The manufacturing method of most 4×36 grinders avoids the use of belt edges. A weak engine and wide belt sand are also slower than most other machines. You might be tempted to use a 4×36 grinder, especially if you already have it, but it’s not ideal for making knives at all.

Considerations outside of group size

Belt size, while important, is not the only factor to consider when choosing a top-rated knife grinder. There are three factors to consider when purchasing a grinder.


The size of the car is one of the most important factors when choosing a bricklayer. To grind steel efficiently, you need a high tire speed with the ability to push the tire under high pressure. If you don’t have a big car, you can’t drive well. Typically you will need a 1 horsepower motor for every 72-inch width. As the length of the tire decreases, the load on the engine decreases. Thus, a shorter strip length requires less energy.

For example, a 2×72 grinder works best on a car with at least 2 horsepower. On the other hand, the 2×48 grinder can work well with a car that delivers 1.5hp because the tire length is shorter.


When grinding steel, a higher braking speed is required compared to wood. Because of this, wood mills have lower cutting speeds in metal. The braking speed (measured in feet per minute) should be between 4,100 and 7,000 depending on the type of metal. You can calculate the speed of the zone using the following formula:

sfpm = (π x diameter of the moving wheel) x speed of the car


Not all grinders have different speed settings, and you don’t have to make knives, but it’s a practical matter. Variable speed grinders allow you to cut heavy steel at full speed when grinding at slower speeds. With the ability to control the speed, you can make knives more precisely and easily.

By Anurag Rathod

Anurag Rathod is an Editor of, who is passionate for app-based startup solutions and on-demand business ideas. He believes in spreading tech trends. He is an avid reader and loves thinking out of the box to promote new technologies.