Machine Knife Inc - Precision Edges Grinding, Sharpening and Trimming

J&T Machine Knife Inc. is a manufacturer of Industrial Machine Knives, Slide Ways, Shear Blades, Guillotine Blades, Shear Knives, Guillotine Shear Blades, and Food Processing Knives.

We also make Stainless Steel Circular Slitters, Slitter Knives, Scraper Blades, Circular Knives, Linear Tracks, Cane Knives, Mill Blades, Scrap Blades, Robots, and Robot Guide Ways.

In addition, we make Long Knives, 180"
Scrap Processing Blades, Linear Plates,
Transfer Rails, Paper Guillotine Knives,
Slicers, Linear Guides, Wearing Parts,
and Wear Components.

There is More than You Know To Precision Grinding

Precision grinding is more complicated than you think. It’s a process using a grinding wheel to cut items into shapes.  It’s one of the reasons why machinists are so costly to use. They can split any item to .0001 in./.0025 mm. That is about the size of a cigarette paper split 3 times in thickness. That is very precise. However, they need the right tools to accomplish this feat.

There are several types of grinders that can do any type of grinding you need done. Of course, you can purchase a grinder and do it yourself, but remember, if you take away too much the tool it’s damaged forever. You can find various machines used for grinding such as:


         Hand-cranked  -- grindstones, used for sharpening knives

         Handheld power tools such as angle grinders and die grinders

         Industrial machine tools called grinding machines

         Bench grinders normally found in home garages and basements

It takes a lot of practice to precision grind any type of tool such as knives, garden tools, scissors, or anything with an edge that needs to be sharpened. It can also be used to shape an object such as the flashing on house or a car fender or siding. Most precision grinding is done on the industrial side for products and parts used in other products.

It’s usually called manufacturing and toolmaking of products. They mass produce volumes of products out of rough metal such as drill bits, hammer heads, and other items that can’t be poured metal or molded. They sometimes take a sheet of metal and cut out shapes.

What Is Precision Grinding?

Precision grinding is a subset of cutting.  It is a macroscopic cutting operation using a single point cutting edge such as a fine grinder. It may be very tiny or huge depending on what is being made from it.

It’s commonly used in the industrialized industry such as injection mold makers, tool and die makers, and precision machining professionals. Toolmaking is more than just making tools. They make vast amount of items used in other products such as cars that need a lot of parts to make a “car” a car. Each machine or tools such as drill, alternator for a car, or an airplane require many parts to make it a product. They need precision grinding parts to make other products.

Although most precision grinding is controlled by a computer, there was a time when it was all hand done using a grinder and a machinist. There are still parts that need to be made by hand such as some parts that go into an airplane’s landing gears. You can look around your house and see products that are the result of precision grinding. The word precision is due to the parts that must be extremely accurate to fit into another part. You have, of course, bought a part for a product you have and had to take it back because it didn’t fit, right? That’s because it wasn’t created using precision grinding, mostly likely, it was molded instead.

Types of Precision Grinding Tools Used in Manufacturing

Since precision grinding requires cutting medal much harder than the metal it is cutting, they have to use a harder type of metal or steel to cut other metal. There are two types of grinding wheels used:

         Aluminum oxide – is tougher that carbide wheels, but softer, so it wear out or becomes dull faster 

         Silicon carbide wheels – is very hard but brittle

There are different types of grinding wheels:




         Straight Cup

         Flaring Cup

Each one does a different type of precision grinding, depending on the part they are making and the material. There are also different types of grinder such as jig-grinder, cylindrical grinder, ID/OD grinder, tool and cutter grinder. They all have different capabilities and tolerances. It takes a very experienced machinist to operate all the equipment for precision grinding.

Technology has brought us a long way to create any part that is needed for any product. There is, of course, much more too precision grinding than just the machinery used to do it. It also requires knowledge in speed milling, hard machining, laser machining, and manual surface grinding.  Also, knowing how much of a workload each grinder can take and an accuracy for the finished product.  It won’t do to make part that doesn’t fit or fits badly. Machinists take pride in their work and their reputation.

Shear Blades

Trimmer Knives

Circular Slitter Knives

Guillotine Blades

Precision Grinding

Surface Grinding

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There is More than You Know To Precision Grinding

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