How do I know what size my keyway is?
In the English system, it is standard practice to dimension keyways. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. Referencing Figure 1, the keyway dimension is W x T1. Unless otherwise specified, the shaft keyway is assumed to be standard.
Are all Woodruff keys the same?
The two most common types are full radius woodruff keys and flat bottom woodruff keys. Both function the same, but may be appropriate for different applications. It is important to note that both radius and flat bottom woodruff keys are standard and either is shipped at the manufacturer’s discretion.
What size is a 304 woodruff key?
Keyseat Dimensions for Woodruff Keys per. ANSI B17. 2
| ANSI Key No. | Nominal Size | Key Above Shaft |
|---|---|---|
| 303 | 3⁄32 × 3⁄8 | 0.0469 |
| 403 | 1⁄8 × 3⁄8 | 0.0625 |
| 204 | 1⁄16 × 1⁄2 | 0.0312 |
| 304 | 3⁄32 × 1⁄2 | 0.0469 |
What size is a #9 woodruff key?
3/16″ x 3/4″ Key No: 9 Woodruff Key
| Type | Woodruff Key |
|---|---|
| Key Number | 9 |
| Width | 3/16″ |
| Length | 3/4″ |
| Grade | 1035 |
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.
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.
What size is a #9 Woodruff key?
How are metric Woodruff keys measured?
Woodruff keys, identifiable by their half-moon shape, are measured two ways depending on if it is an imperial or metric key. Imperial woodruff keys are measured by their width and diameter, whereas metric woodruff keys are measured by their width and height.
Are there metric Woodruff keys?
Stanho metric woodruff keys are supplied to DIN 6888 / ISO 3912 in C45k key steel and are made to minus tolerances (h9 on width and h12 on height). Our carbon keys are normally made from cold drawn SAE-1035 steel and come in a wide range of metric sizes.
How do you replace a Woodruff key?
You can try tapping a nail on one end of the key, drilling into the center of the key and removing it with a nail, or even heating the key up with a blowtorch and letting it cool repeatedly to loosen it. Remember that damaging the key is a far better alternative than damaging the shaft or other part around the key.
Which way does a woodruff key go?
If you look at the end of the crankshaft slot you will see it tapers as it gets closer towards the block and the taper is upwards, so the key goes in with the tapered side facing down and the two tapers fit each other tight so the key doesn’t slide too far back.
What are key dimensions?
1 the dimension of time, which is necessary in addition to three spatial dimensions to specify fully the position and behaviour of a point or particle. 2 the concept in science fiction of a dimension in addition to three spatial dimensions, used to explain supranatural phenomena, events, etc. ♦ fourth-dimensional adj.
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.
Should key be stronger than shaft?
In this case, key stress is about 50% higher than shaft stress. This would appear to require that the key material be 50% stronger than that of the hub; however, because part of the torque is transmitted through friction between the shaft and hub bore, the key material need only be as strong as the shaft material.
Which term best describes the shape of a woodruff key?
A woodruff key is a half-moon-shaped machine key that prevents gears, hubs, or other components from moving independently of a rotating shaft or spindle.
Why is it called a woodruff key?
Named after the Woodruff Manufacturing Co, in Hartford, Connecticut, who first manufactured it in 1892.
What are the dimensions of a woodruff key?
WOODRUFF KEY DIMENSIONS ANSI Key No. 202 to 1012 Height Width Diameter Actual Length Full Radius Flat Bottom Distance Key Below Center No. ANSI Key No. Nominal Key Size W x D Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Dec. Frac. 201 202 1/16 x 1/4 0.0625 0.0635 0.240 0.250 0.238 0.248 0.104 0.109 – – 0.016 1/64
Why are Woodruff keys so hard to install?
This can make woodruff keys difficult to install. To keep a woodruff key in place while installing a mating component, ensure that it is situated tightly in the key seat. Since woodruff keys are made to tight tolerances, they often require a press fit into its seat.
How do you press a woodruff key?
Since woodruff keys are made to tight tolerances, they often require a press fit into its seat. This is done by lightly tapping the flat, protruding face of the key with a hammer or mallet until the key is seated firmly.
What is the nominal size of the key?
Key Identifier Nominal Size W X B 305 3/32 × 5⁄8 405 1⁄8 × 5⁄8 505 5⁄32 × 5⁄8 605 3⁄16 × 5⁄8