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Are you tired of your dull knife? Why not try a belt grinder?

Belt sanders and grinders are available in various sizes for sanding, deburring, shaping, grinding, polishing, cleaning, sharpening, and removing oxidation from metal. Like a belt sander, a belt grinder has abrasive coated belts. It creates a polished surface when the material is passed over. Correctly sized belts and contact wheels are key to contacting the part while making the desired effect.

Whether you are a toolmaker, a home hobbyist, or a full-time manufacturer, we get various brands covered for sale, such as JimBon, ONEVAN, dutoofree, YunlinLi, and so on. All of them can help you from initial grinding to final polishing for perfect belt grinder plans.


What is a belt grinder?
Belt grinder is also known as belt grinder for knife making, multitool grinder, knife belt sander. Abrasive belt grinding is an abrasive process used for metals and other materials. It is commonly used as a finishing process in the industry. A belt coated with abrasive material is run over the surface to be machined to remove the material or produce the desired finish. Most belt grinders come with attachments. Belt grinder parts are available. A 2x72 belt grinder kit is popular.

  • Types
Angle Grinder

Bench Grinder

Belt Grinder

Wet Grinder

Die Grinder

Floor Grinder

How to choose the belt grinder that suits you?
Here are some factors you should consider:

  • Belt size
The 2x72 belt grinder is popular for its high performance.They are widely preferred by professional toolmakers, but other options are more compact, more affordable and equally effective.

Other options include:

1X42 belt grinder

2X42 belt grinder

2X48 belt grinder

4X36 belt grinder

1x30 belt grinder

  • Motor size
Motor size is one of the most important factors when deciding on a belt grinder for tool making. To grind steel efficiently, you need high belt speeds and apply high pressure to the belt. Without a large enough motor, you will not grind well. As the belt length decreases, so does the need for a motor. Therefore, smaller belt lengths require less power.

  • Belt speed
Steel grinding requires higher belt speeds than wood. Therefore, wood-oriented belt grinders cut steel at slower speeds. Belt speeds (in surface feet per minute) need to be in the range of 4,100 to 7,000, depending on the type of metal. You can calculate the belt speed using the following formula.

sfpm = (π x drive pulley diameter) x motor speed

  • Variable speed
Not all belt grinders have a variable speed option, which is not completely necessary for knife making, but it is helpful. A belt grinder with a variable speed option allows you to perform heavy steel grinding at full speed while grinding at a lower speed. Having the ability to control speed will allow you to make knives more accurately and with less effort.

What are the best brands?
  • The best brands:





Grizzly Industrial

Work Sharp

Red Label Abrasives






C.S. Unitec


How to use a belt grinder correctly?
Different tool manufacturers use different techniques to remove and create inserts. However, regardless of your insert creation process, some of the principles of abrasive belt grinding remain the same.

  • Selecting a belt grinder
Belt grinder size:

2x72 belt grinder

1X42 belt grinder

2X42 belt grinder

2X48 belt grinder

4X36 belt grinder (more suitable for woodworking than knife making)

  • Sharpening process of knife-making
1. Grinding the initial blade shape

2. How to sharpen the bevel

3. Finishing the blade

Here is the website for reference.

Why should you buy a belt grinder on LumBuy?
LumBuy is an e-commerce company that focuses on high-quality products. We have the strictest supplier selection criteria and will only select 5-star products with an excellent reputation, where you can shop with confidence and buy the best products.

What is the difference between a belt sander and an abrasive belt sander?
  • Belt sander
A belt sander is designed to perform general material removal, whether it is wood or metal. Make sure you use the correct type of belt and grit for the material to be sanded.

If you are sanding wood, the wood will not burn because of the slower belt speed and the belt sander will not remove a ton of material at once, so you will have time to process the wood and get the finish you're looking for.

If you are sanding metal, you can quickly remove all sharp edges and rounded corners. Plus, you have only one area to sand around the table and platen. The lower pulley, or as we call it in our industry (the drive pulley because it drives the belt), is a hard plastic pulley that is unsuitable for sanding.

  • Belt grinder
If you want to remove a large amount of material, such as removing a riser from casting and removing a large amount of steel quickly, then you will need a belt grinder. The belt grinder belt speed is usually twice the speed of the belt sander.

Belt grinders typically have multiple grinding points, such as a platen, with a second grinding point being the contact wheel.

How to make a 2x72 belt grinder?
  • Homemade Belt Grinder Steps
Step 1: Drawings and Models

Step 2: Fabrication and installation of front panel

Step 3: Making and installing the back panel

Step 4: Making the hinge for the tracking wheel

Step 5:Make the upper arm

Step 6: Making the feet

Step 7: Making the tool holder

Step 8: Making the flat tool arm

Step 9: Installing the gas spring for belt tension

Step 10: Troubleshooting

Step 11: Fully armed and operable belt grinder

Step 12: Updating the design

Here are some websites for reference. They have additional information that can help you to make a DIY 2x72 belt grinder.

Can you use a belt sander to sharpen knives?
A belt sander is a sturdy tool that is most useful for woodworking. Although it is rarely used for metalworking, this does not mean that it is not helpful for any other task. With the same power and efficiency, belt sanders are used to make and sharpen knives.

  • Steps:
1. Load a medium grit belt into the sander.

2. Choose the direction of rotation for your sander.

3. Turn the belt sander on to maximum speed.

4. Sharpen the blade.

5. Allow your knife to cool.

6. Hone the blade.

Here is the website for your reference.