Keyway broaches are used to form starter holes, remove material or shape a workpiece. These and other rotary broaches are used in a one-pass operation and have a bar-shaped design with several teeth that can progressively increase in height or shape from the starting end.
How keyways are cut?
A notch called a keyway is cut on the inside of the gear along with another notch cut, longways, into the shaft. Then and a piece, usually metal, called a key is inserted into the shaft keyway. The gear can then be fitted onto the shaft and the keyway on the gear will fit over the key, inserted in the shaft.
What does broaching mean in English?
: to bring up as a subject for discussion She broached an idea.
How are internal keyways machined?
Keyway cutting with a keyseater machine (or internal keyway slotting machine) removes material through a series of tooth cutting strokes. Some keyseaters only feature a single tooth cutter, while other machines (like the Davis Keyseater) use a multiple tooth cutter to achieve cutting speeds as fast as broaching.
How do keyways work?
A key and the keyways make up a Keyed joint to secure the hub and the shaft to prevent relative movement between a power transmitting shaft and an attached component. For example, Gear drives, Pulleys or Sprockets are connected securely using keys to the power transmitting shaft (Figure 1).
How are keyways made?
A key is usually made from steel and is inserted or mounted between the shaft and the hub of the component in an axial direction to prevent relative movement. Shaft and hub keyways are often cut on key seating machines but can also be made using broaching, milling, shaping, slotting EDM.
Has been broached?
When you broach a subject, especially a sensitive one, you mention it in order to start a discussion on it. Eventually I broached the subject of her early life.
What is keyway cutting with a broaching machine?
Keyway cutting with a broaching machine is similar to keyseating. However, it’s more common for a broaching machine to feature a cutter with multiple teeth. Again, the cutter on the broaching machine is pushed through a hub and removes more material with each tooth the further it advances.
How thick is a 6061 aluminum keyway?
The material is 6061 aluminum, it’s 3/8″ thick with a ø3/8″ hole and I’ll be broaching a 3/32″ keyway. Broach Kit, including a broach, shims (as needed) and the appropriate bushing.
How do you fix a broken broach on a pulley?
With the broach removed, use a chip brush to remove the swarf from the broach. It’s important to clean these chips before broaching another keyway. Failure to do so can result in the broach jamming in the bore. Now, we can take a key and test fit the freshly broached pulley with a shaft.
How do you put a broach in a bushing?
Liberally lube up the broach with your favorite cutting oil and and insert the broach into the slot in the bushing. The first quarter or so should slid in easily before the teeth engage with the part. Align the part with the gap in the press and ensure the broach is straight up and down.
