Definition of feather key in machinery. : a sunk key without taper that is permanently fixed in one of the connected pieces and that is a sliding fit in a keyway in the other so as to permit relative longitudinal motion. called also spline.
What is the purpose of feather key?
Feather Keys are drive keys that transmit torque from a shaft to a driven component. They are square keys but with radiused ends. The mating slot in the shaft is machined with an end mill that matches the radius of the shaft key design. Once installed the key is contained in the machined pocket and cannot move axially.
What is the difference between a feather key and parallel key?
The Feather key is a parallel key and very similar to square and rectangular keys except that it has a radius on both ends and machined to tight length tolerances. The mating keyslot in the shaft is machined with an end mill cutting tool and ma- chined to the same length as the Feather Key.
How do I get rid of the feather key?
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 the purpose of key in shaft?
In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft. The key prevents relative rotation between the two parts and may enable torque transmission.
What is the disadvantage of keyed joint?
Too much securely fixed keyed joint might become difficult to dismantle. Causes shaft imbalance. They introduce stress points due to the notch effect and reduce shaft strength. Possible axial displacement of hub unless locked by an extra component such as circlip or set screw.
What is Kennedy key?
The Kennedy key consists of two square keys. The hub is bored off the centre and the two keys force the hub and the shaft to a concentric position. Kennedy key is used for heavy duty applications.
Are Woodruff keys hardened?
Keys are non- hardened and are easy to machine. Use for general purpose applications. Half-moon shaped keys lock pulleys and gears to transmission shafts. Woodruff keys go deep into the keyway shaft and become embeddedbut can still rock and adjust to an angular spine.
How much torque can a keyway handle?
The limiting pressure point of a keyed shaft is the keyway side of the male shaft, provided the proper key material is selected. Thus, 270 Nm is the maximum torque that can be transmitted before the 19 mm diameter keyed shaft plastically deforms.
How tight should a Woodruff key be?
It is important for key to be somewhat snug and stable in the key seat. If key is not snug/stable then key can easily slide out of key seat due to the curved profile on the bottom. This is very inconvenient in cases where it is difficult to see as the pulley is installed.
What is saddle key?
Definition of saddle key
: a key for securing a member to a machine shaft that fits into a keyway in the secured member and is concave to grip the shaft by friction compare flat key, sunk key.
Which key does not require a groove in the shaft?
Compared to sunk keys, saddle keys are not sunk into the shaft and hub instead they are only sunk into the hub. They either sit on a flat or circumference of the shaft.
Which key does not require keyway on the shaft?
Hollow and flat keys
They are only used for transmitting little rotary forces. For these no keyway must be made: – The bottom of hollow keys is concave in longitudinal direction. The edges of these keys resemble cutting edges which contact the shaft.
How will you justify that when the key is inserted in the keyways of shaft and the hub and pressed by means of hammer it becomes tight due to wedge action?
(1) When the key is inserted in the keyways of shaft and the hub and pressed by means of hammer, it becomes tight due to wedge action. This insures tightness of joint in operating conditions and prevents loosening of the parts.
What is sunk key?
Definition of sunk key
: a key that fits into keyways in both the shaft and the secured member in machinery compare saddle key.
What is the main advantage of sunk key?
6. The main advantage of sunk key is that it is a _____ drive. Explanation: Sunk key is a positive drive and no slip occurs. 7.
Why is it called a Woodruff key?
ETYMOLOGY OF THE WORD WOODRUFF KEY
Named after the Woodruff Manufacturing Co, in Hartford, Connecticut, who first manufactured it in 1892.
What does the key of A flat look like?
A-flat major (or the key of A-flat) is a major scale based on A?, with the pitches A?, B?, C, D?, E?, F, and G.
A-flat major.
| Relative key | F minor |
| Parallel key | A-flat minor enharmonic G-sharp minor |
| Dominant key | E-flat major |
| Subdominant | D-flat major |
| Component pitches |
|---|
How do you remove a Woodruff key?
Remove the Woodruff key.
- Try tapping down on one end of the key with a hammer and nail.
- Rapidly heating the key with a blowtorch and letting it cool can help loosen it.
- Remember that these keys are cheap and readily available online or at hardware and auto part stores, so causing damage to it may be necessary.
How do I attach a feather to a keychain?
Stick the eye pin through the top of the feather patch, and then loop the eye pin around itself to hold. Then attach that to the larger jump ring. Attach a small ring on wooden key and locket button. Attach another small ring around the locket button, and attach that jump ring to the larger jump ring.
What is sunk key What are the types of sunk keys?
Sunk keys are of following types:
- Feather key.
- Parallel sunk key.
- Rectangular sunk key.
- Square sunk key.
- Woodruff key.
- Gib-head key 1. Feather Key Feather key is attach to one member of pair with which permit relative axial movement is identified as feather key.
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