If you are wondering what type of broach you should use, you have come to the right place. The article below will provide you with an overview of the types of broaches. From the basic to the more advanced, this information will help you select the right tool for the job. Read on to discover what hex broaches are and how they work. You will also learn how to use hexagonal broaches and how to maintain your tool’s quality.


There are several different types of hex broaching. Conventional broaching involves pushing polygon forms through a hole. The rotary broaching, on the other hand, cuts a complete polygon form in one pass. Both types require a tool holder and a broach. Standard broaches are made of M-2 HSS, but you can also find special ones made of PM-4. This makes them convenient for smaller machine shops and hobbyists.

Before hex broach, you must drill a pilot hole that is larger than the hole to be broached. The pilot hole should have space at the bottom to collect the broaching chips. Then, use a flat-bottom drill to break them off cleanly. Remember to set the drill pilot hole slightly larger than the form’s major diameter. It is possible to broach parts without a countersink, but this will reduce the size of the broach hole.

Hexagonal Broaches

A fundamental aspect of rotary broaching is the chamfer. This feature is necessary for a flat surface to be broached properly and is a critical element of success. Ideally, a pilot hole is at least three percent larger than the flat area to be drilled. However, the diameter of the hole can be reduced or increased depending on the material’s machinability. In general, the ASME standard allows for a hole diameter of up to three percent smaller than the material’s OD.

Hexagon broaches are generally available in metric sizes from four to twenty-five millimeters. They are often custom-made to meet the specifications of a particular customer and can be coated with TiN or TiAlN. Whether they are used for manufacturing or for repair, they are the perfect tool to use when repairing holes of any shape. Hexagon broaches are available with or without a diamond coating, depending on their purpose.

Hexagon Broaches

Hexagon broaches are available in a variety of sizes, shapes, and configurations, and are ideal for enlarging irregular shapes in a work piece. This tool is also useful for creating squares, splines, hexagons, and six-lobe shapes. The following are a few basic examples of how hexagon broaches work. When choosing which tool to purchase, remember to always choose the correct size.

A hexagon broach is an ideal tool for cutting holes with a hexagon shape. You can use it with a hydraulic or arbor press. This tool can be used to cut a hole in a single pass or manually. The hexagonal broach is made up of several hardened and ground bars, each of which has progressively larger teeth on its periphery. Hexagon broaches provide adequate rigidity and cutting range. Because each tooth is progressively larger, the hole can be cut deeper than the previous one.

Before you start a hole, it’s a good idea to drill it up to 33% of the diameter of the work piece. This will allow you to avoid over-boring and reduce the amount of thrust you need to broach the work piece. If the hole is small and does not require a full form, you should use the largest pilot hole you have to start drilling. When using a square or hexagon broach, the formula for the start drill is 1.0198 x A/F.

Hex Broach

The broach is a tool used to make holes in hex shapes. To make a hex hole, the diameter of the hex shape should be 1% larger than the width of the hex. The broach cutting force changes dramatically as the hole diameter decreases. The recommended depth for internal broaching is 1.3 to 1.5 times the hex-profile length. This depth can be reduced slightly if the part is free-cutting. A 1deg offset can be used for high-speed applications between 1500 to 3000 rpm. When broaching at high speeds, the cutting edge will dig into the part surface, reducing the tool life.

The hex broach is a rotary tool with a square or hexagon form. To use it, the hole must be precisely shaped. To do this, the tool must be ground and matched to the desired hole geometry. To do this, a rotary broach has a one-degree offset along the longitudinal axis. This offset creates a “wobble” which allows the tool to cut the desired hole. If you seek most popular Hexagonal Broaches & Hex Broaches consult with Somma Tool for more information.

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