Metric keyways are dimensioned by width and depth as measured from the radius of the shaft to the center of the keyway.
How do you measure the depth of a keyway?
The distance from the bottom of the shaft keyseat to the opposite side of the shaft is specified by dimension S. The distance from the bottom of the hub keyway to the opposite side of the hub bore is specified by dimension T.
Depth Values for Shaft Keyseats – Hub Keyways:
| RESULTS | ||
|---|---|---|
| Nominal Shaft Diameter [D] | — | inch |
| Dimension S | — | |
| Dimension T | — |
What is the depth of a typical keyway?
Metric (ISO/R773)
| Shaft Diameter | Width | Depth |
|---|---|---|
| D | W | T2 |
| over 110 to 130 | 32 | 7.4 |
| over 130 to 150 | 36 | 8.4 |
| over 150 to 170 | 40 | 9.4 |
What is the standard keyway for a 5’8 shaft?
Key Depth Tolerance is +.
Standard Keyway Dimensions.
| Bore | Width | Depth |
|---|---|---|
| 9/16 | 1/8 | 0.618 |
| 5/8 | 3/16 | 0.704 |
| 11/16 | 3/16 | 0.768 |
| 3/4 | 3/16 | 0.832 |
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 do you pick 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 is the standard keyway for a 1 shaft?
Imperial Rectangular B.S. 46 : PART 1 : 1958
| Nominal Shaft Diam | Key Size | |
|---|---|---|
| Over | To (incl.) | |
| 1 | 1 1/4 | 5/16 x 1/4 |
| 1 1/4 | 1 1/2 | 3/8 x 1/4 |
| 1 1/2 | 1 3/4 | 7/16 x 5/16 |
What is a shaft key?
The shaft Key is a small metallic component that plays a major role in connecting the shaft and hub with another rotational component such as gears, bearings, etc. Shaft keys are always parallel to the axial of the shaft. There are several types of shaft keys.
What does key dimension mean?
n. 1 often pl a measurement of the size of something in a particular direction, such as the length, width, height, or diameter.
What is nominal shaft diameter?
Request Custom or. Steel shafts are round, precision ground bars used to transmit power in machines. Nominal shaft diameters reflect standardized dimensions and tolerances. The steel shafts are made to a negative tolerance to ensure they fit with plus tolerance holes of the same nominal diameter.
What material is key steel?
Key Steel is an unalloyed medium carbon steel. It is supplied bright drawn in square and flat bar, to tolerances as stipulated in BS46. Established in 1975 we supply a wide range of steel specifications.
What is feather key?
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 standard key?
The standard key is a special primary table key in an internal table. Key Fields of the Standard Key.
How do you measure a Woodruff keyway?
Imperial woodruff keys are measured by their width and diameter, whereas metric woodruff keys are measured by their width and height.
What is keyway factor?
A key factor is defined as the factor in the activities of an undertaking which, at a particular point of time or over a period, will limit the volume of output. Other variant terms are limiting factor, Principal Budget Factor & scarce factor. Limiting factors are governed by both internal & external factors.
How do you measure a torque shaft?
Inputs that we need to calculate shaft diameter
- ? = Torsional stress induced at the outer surface of the shaft (Maximum Shear stress).
- r = Radius of the shaft.
- T = Twisting Moment or Torque.
- J = Polar moment of inertia.
- C = Modulus of rigidity for the shaft material.
- l = Length of the shaft.
What is the difference between keys and splines?
The main difference between splines and keys is that splines are integral with the shaft but keys are inserted between shaft and hub. As compared with one or two keys used for load transmission, there are usually four or more splines on a shaft.
How is the thickness of key calculated?
The usual proportions of this key are : Width of key, w = d / 4 ; and thickness of key, t = 2w / 3 = d / 6 where d = Diameter of the shaft or diameter of the hole in the hub. The only difference between a rectangular sunk key and a square sunk key is that its width and thickness are equal, i.e. w = t = d / 4.
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.
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).
What is the ratio of keyway taper?
Standard inch-sized tapered pins have a taper on diameter of 1:48[1] while metric ones have a taper of 1:50.
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