Broaching Tool

Broaching tools are used in a variety of manufacturing and industrial applications to create holes or cut surfaces. Broaching tools are also used to cut square keys or splines in mechanical devices such as gears, driveshafts, and pulleys. A keyway broach is used to cut a keyway, a slender slot formed inside the hub. The splined broach is used to cut a spline, a shaft with a series of longitudinal, simple security features that fit into the slots of the mating part. Each type of broach can cut a different amount of material. A steel broaching tool for instance can remove 0.05 mm of material, while a brass broach can remove 0.10 mm. Draggers can be pushed through an existing hole or placed in a horizontal or vertical broaching tool.

Basic Types of Broaching Tools

Most broaches fall into two basic categories: drag and drop. Alternatively, you can also divide the broaches into internal or external broaches. Broaches and pushers use similar strategies to handle materials. The broaching tool must be short enough to withstand extreme pressure without breaking or buckling. The broaching tool can be used horizontally or vertically and makes fine cuts as the workpiece is pulled through the teeth. Internal broaches create keyways or other internal holes for many industries and applications. The internal broaching tool is an excellent way to create simple or complex parts at high speeds. External broaches, also known as internal broaches, are used to create outer contours or specific edges. Create complex designs for inserts, sections, and indexed tooltips with this dynamic drag design.


What kind of broaching tools can I choose from?

Round Broaches

The simplest type of broaching tool is the circular broach. It is a round bar that produces a hole similar to a hole made by a drill. The difference is that the drag cut is faster, cleaner, and produces tighter tolerances. Round broaches can be used to quickly produce accurate holes and are great for large-scale mass production.


Spline Broaches

Spline broaching tools allow operators to cut a sequence of teeth or notches around the perimeter of an already cut hole. This particular shape is of great importance in the automotive industry where the splines play a large role in driveshafts, gearboxes, and other parts. The ridges around the circumference of the spline provide an effective means of transmitting power from one section to the other as the part that fits there will have no room to move. Dragging provides the accuracy required by these high-tech components that can be achieved.


Specialty Broaches

The beauty of broaching tools is that many different types of holes and cuts can be made from them. Regardless of whether you need a specific shape or something more complicated, you can make a special broach tailored to your needs. Colonial Tools is a leader in the production of high-quality special brooches and can provide you with a free quote for your project. Typical examples are concave broaches - used to create seat sectors - turbine discs and blades.


Standard keyway broaches

The creation of keyways is a matter of precision, and stock parts do not always provide enough precision. The keyway broaching tool can take a variety of forms, from a key-shaped opening to a cut around the perimeter of another opening that serves as the point where the key rests in part.


Helical Spline Broaches

These broaching tools produce a helical series of grooves on the inside of the bore due to the configuration of their teeth, which must be highly accurate in their placement to ensure proper cutting. This type of broach is a big player in the production of firearms and automotive gear. Despite the stringent accuracy requirements, a well-made spiral broach with a spine can be used to quickly create a large number of replicated parts.

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