What is the purpose of shaft key?

A Shaft key is a piece of metal used to connect a rotating machine element to the shaft. A shaft key prevents a relative rotation between the two parts and may enable torque transmission to occur.

Which key is integral with shaft?

Feather key: Feather key is a parallel key made as an integral part of the shaft with the help of machining or using set-screws. It permits axial movement and has a sliding fit in the key way of the moving piece.

What is a shaft keyway?

A keyway is a recess in a shaft or hub to receive a key, and these recesses are commonly cut on key-seating machines or by broaching, milling, planning, shaping and slotting.

What is the slot called in a shaft that a key fits into?

Usually the term keyseat is referred as a groove or pocket on a shaft, and a keyway is a slot in a hub in which the key fits into. The complete system is called a keyed joint (Figure 2).

How do I choose a shaft key?

Key dimensions: Parallel keys are most commonly used. The key and key seat cross section are ISO standardized. The key length should be less than about 1.5 times the shaft diameter to ensure a good load distribution over the entire key length when the shaft becomes twisted when loaded in torsion.

How do you get a shaft key out?

The normal way to remove the key is to use a small cold chisel to impact the edge of the key in order to force it from its slot in the shaft. The exposed end of the key can be ground with a die grinder so that a “v” grove is formed in the end of the key.

What is sunk key What are the types of sunk keys?

Types

Sunk key. Types of sunk keys: rectangular, square, parallel sunk, gib-head, feather, and Woodruff.
Saddle keys. These types of keys are generally attached to the driving member (e.g. shafts).
Tangent keys.
Spline key.
Broaching.
Keyseater.
Wire-cut electrical-discharge machining (EDM)
Shaping or slotting.

Which key is used for light load?

a) Flat saddle key A flat saddle key is a taper key which fits in a keyway in the hub and is flat on the shaft. Therefore it is used for comparatively light loads.

How deep do you cut a keyway in a shaft?

Milling of keyway Layered milling is to cut the keyway layer by layer, the depth of each operation is only 0.5-1 mm, then carry out the back and forth milling with a larger feed rate until it reaches the desired depth.

How long should a shaft key be?

The key length should be less than about 1.5 times the shaft diameter to ensure a good load distribution over the entire key length when the shaft becomes twisted when loaded in torsion.

What is sunk key?

: a key that fits into keyways in both the shaft and the secured member in machinery — compare saddle key.

How do you remove a stuck Half Moon key?

Try tapping down on one end of the key with a hammer and nail. Another option is to drill into the center of the key and remove it with a nail. Rapidly heating the key with a blowtorch and letting it cool can help loosen it.

What do you need to know about keyed shafts?

Axial grooves, otherwise known as key ways are cut in the shaft and then in part mounted on it. Then, the key is fitted between the shaft and the attached portion. To ensure the complete functioning of the key, both the shaft and rotating machine must have a keyway and keyseat.

What kind of key do you use to connect gears?

Woodruff Keys. Woodruff keys work well near shaft shoulders and on tapered shafts. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. Use them in light duty applications to connect gears and other components to shafts. Also known as half moon keys.

What kind of key fits in the hub?

A flat saddle key is a taper key that fits into the keyway in the hub and lies flat on the shaft. It is likely to round the shaft under load. Therefore, it is used for comparatively light loads. A hollow saddle key is a taper key that fits into a keyway in the hub and is shaped under the key to fit the curved surface of the shaft.

Where does the key stock go in a pulley?

1,029 products found. Key stock is a small metal block or wedge inserted between a shaft and the hub of a pulley, gear, sprocket, or other rotating power device. It provides driving torque and prevents movement. One part of the key fits into a precut slot in the shaft known as a key seat.