A broach cutting tool is a slender cutting tool made from tool steel that produces a pre-determined shape on the inside or outside of a part. The broach tool has cutting teeth along its length that are tapered so the last cutting teeth are larger in diameter or taller in height than the first cutting […]
Most broach cutting tools require sharpening after 0.008 to 0.010 inches of wear is generated on the tops (outside diameter) of the cutting teeth. This is a good starting point for tool life management and often leads to maximum broach tool utilization.
Broach cutting tools are usually used in broaching machines, designed specifically for the broaching process. Most broaching machines use pull type broaches or mounted surface (external) broach tools. Broaching machines come in vertical and horizontal orientations. Push type broaching tools are used in a hydraulic press, where a smooth continuous stroke is required.
Broaches should be shipped in wood, metal, or stiff corrugated cardboard packaging with wooden or thick plastic ends. All surfaces that contact the broach should be covered in a soft and durable material, such as wood, plastic, rubber, or dense cardboard product. The broach tools should be packed tightly to ensure no movement of the […]
Broach cutting tools should be stored in vertical or horizontal racks, keeping each tool separate from one another. A soft padding (such as wood, plastic or rubber) should be used to cover all surfaces touching the broach tools.
Broach cutting tool wear is measured best with a digital microscope with optical measurement capabilities. The microscope can be used to quantify the amount of wear on the tops, corners, and faces of the cutting teeth.
Uncoated broach tools made of a premium high speed steel grade can usually cut parts that have a hardness less than or equal to 32 HRC. It is possible to cut parts that are 38 to 42 HRC in hardness with a combination of premium high speed steel and advanced PVD coatings. Parts that have […]
Yes, most broach tools can be resharpened.
Broach tools often perform best when ran between 10 and 30 feet per minute (sfm) cutting speed. This translates to 3 to 9 meters per minute, in the metric system. The cutting feed (cut per tooth) of a broach tool is fixed, established when the broach is manufactured.
Broach cutting tools are usually made of an molybdenum or tungsten series tool steel: M2, PM-M4, PM-T15, etc…