Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque

N = Number of Keys (same size) Keyway application design factor K d. Coupling Design: K d: Fixed (tight fit) while loaded: 1: Sliding Fit - Axial motion along the shaft when unloaded. 3: Sliding along shaft with loading: 9: Application factors K a. Application Factor K a (DIN 3990-1) Driving Component Loading. Driven Component Loading.

Design of Key for shaft in Machine Design

σ c = Crushing stresses for the material of the key. So the total torque transmitted by the shaft ( T) = F × d /2 (Eqn 1) The Tangential force acting on the key at the two places as you can see in the above …

DMM-I UNIT-IV KEYS, COTTERS, KNUCKLE JOINTS AND …

Gib head tapered key, 4. Feather key, 5. Woodruff key, 6. Round key or Pin, and 7.Splines. 1. Saddle keys:-The saddle keys are of the following two types: a).Flat saddle key, and b).Hollow saddle key. A flat saddle key: Bottom of the key is flat and the shaft is flattened to match as shown in fig.

Calculator for designing shaft keys

shear stress key τ = F s / (L) MPa. bearing pressure p = F s / (h/2 ) MPa. Nominal torsional stress τ = T/ ( π/16 k3 ), d k =d-t 1. MPa. 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 ...

Keys MCQ [Free PDF]

Keys are used as temporary fastenings and are subjected to considerable crushing and shearing stresses. A keyway is a slot or recess in a shaft or hub of the pulley to accommodate a key. ... These type of keys are …

UNIT-II Design of Shafts and Couplings

It is fitted over the ends of two shafts by means of a gib head key. The power. transmitted from one shaft two other shafts by means of a key and a sleeve. 1. Design for sleeve. 2. Design for key. The length of coupling key is at least equal to the length of the sleeve. The coupling key is.

Solved A rigid type of coupling is used to connect two

The shaft, keys and bolts are made of C45 steel and the coupling is of cast iron. Design the coupling and draw a neat dimensional sketch specifying its type and imporatnt design parameters. Standard tabulated values of shear stress, crushing stress etc for coupling, key, shaft or bolt can be taken from book/internet/catalog keeping in view the ...

Shaft keys revisited | Machine Design

Then make sure that the key fits properly as follows: • Tight in the shaft keyway. • Sliding (not clearance) fit in the hub keyway. • Clearance fit radially — a small clearance between top ...

Shaft, Keys, Coupling (Solving)

shaft diameter and key length is 1 in. Ans. 45 KN. 11. A 3 inches diameter shaft carrying pulleys close to the bearings transmit how much horsepower if the shaft. makes 580 rpm. Ans. 292.7102804 hp. 12. A flange coupling is t o connect two 50 mm shafts. The hubs of the coupling are each 110 mm in diameter.

Solved Problems: Design of Shafts and Couplings

A 15 kW, 960 r.p.m. motor has a mild steel shaft of 40 mm diameter and the extension being 75 mm. The permissible shear and crushing stresses for the mild steel key are 56 MPa and 112 MPa. Design the keyway in the motor shaft extension. Check the shear strength of the key against the normal strength of the shaft. Solution. Given :

Keys and Couplings: Learn Different Types and Characteristics

Test Series. Keys and Coupling are used to join shafts and transfer power between them. Keys are pieces of metal that fit into slots or recesses in the shaft and hub of a pulley, gear or other rotating elements. Couplings are devices that join two shafts together and allow for some misalignment, flexibility or relative motion between them.

keys in shafts crushing ondawireless ru

Keys are used as temporary fastenings and are subjected to consider-able crushing and shearing stresses. A keyway is a slot or recess in a shaft and hub of the pulley to accommodate a key. 13.2 Types of Keys The following types of keys are important from the subject point of view :

A Textbook of Machine Design Keys and …

It is always inserted parallel to the axis of the shaft. Keys are used as temporary fastenings and are subjected to considerable crushing and shearing stresses. A keyway is a slot or recess in a shaft and hub of the …

Sorting out shaft connections | Machine Design

Crushing failure of flat keys. Shaft and hub keyways can compress and permanently deform the key. Compressive (or crushing) stress equals the applied force divided by the contact area. π = F/(l(H ...

Machine Design: LESSON 15 DESIGN OF KEYS

15.2.4 Round Keys. The round keys have a circular cross-section and fit into holes drilled partly in the shaft and partly in the hub. Slot is drilled after the assembly so the shafts can be properly aligned. These are used for low torque transmission. Round keys are shown in …

CH APTER Keys and Coupling

always inserted parallel to the axis of the shaft. Keys are used as temporary fastenings and are subjected to consider-able crushing and shearing stresses. A keyway is a slot or recess in a shaft and hub of the pulley to accommodate a key. 13.2 Types of Keys The following types of keys are important from the subject point of view : 1. Sunk keys, 2.

Transmitting torque with keyed shafts

When the connection rotates, the shaft and hub (mating part) exert opposing forces on the key, attempting to shear the key. The maximum torque that can be transmitted before exceeding the yield strength of the …

UNIT 6 KEYS AND COUPLINGS Keys and Couplings

These are used in large heavy duty shafts. Figure 6.6 : Tangent Keys R w t w Hollow saddle key d . 149 .2.4 Round Keys Keys and Couplings6 The round keys, as shown in Figure 6.7(a), are circular in section and fit into holes ... Considering crushing of the key, the tangential crushing force acting at the ...

or recess in a shaft and hub of the pulley to …

A key is a piece of mild steel inserted between the shaft and hub or boss of the pulley to connect these together in order to prevent relative motion between them. It is always inserted parallel to the axis of the shaft. Keys are used as temporary fastenings and are subjected to consider-able …

keys in shafts crushing

Keys In Shafts Crushing tradegrowthcoin keys in shafts crushing binq mining keys and pins read books online for free sc = safe crushing ober stress lbs per bo in crushing being exerted by the side of shaft material for low crushing strength Keys Couplings and Seals Agricultural and Biological Engineering Determine yield strength of key shaft ...

Lec. 4 Keys and Coupling

It is always inserted parallel to the axis of the shaft. Keys are used as temporary fastenings and are subjected to considerable crushing and shearing stresses. A keyway is a slot or recess in a shaft and hub of the pulley to accommodate a key. TTTyyypppeeesss ooofff KKKeeeyyysss. The following types of keys are important from thesubject point ...

UNIT -II (DESIGN OF SHAFTS, KEYS AND COUPLINGS) …

shear stress for key, shaft, and bolt as 50N/mm2.Take crushing stress of key as 90N/mm 2 and shear stress for C.I as 14N/mm2.Assume maximum torque is 30% higher than mean torque. (16) 10. A knuckle joint is to transmit a force of 140KN.Allowable stresses in tension, shear and compression are 75N/mm 2, 65N/mm 2 and 140N/mm 2 repectively.Design ...

Md-15 Keys and Couplings

Example Problem 15-1: Design of Keys. A 1⁄2-inch shaft transmits 5 hp at 1750 rpm. The shaft is made from cold-drawn 1040 steel; hub is made from hot-rolled 1213 steel; and a cold-drawn 1020 steel key is to be used. If direction is regularly reversed, determine length of square key required for a. SF = 2.5: Material properties: CD 1040. HR 1213.

Solved 1. Design and draw a protective type of cast iron

Assume that the same material is used for shaft and key and that the crushing stress is twice the value of its shear stress. The maximum torque is 25% greater than the full load torque. The shear stress for cast iron is 14 MPa. 2. Design and draw a cast iron protective type flange coupling to transmit 15 kW at 900 r.p.m. from an electric motor ...

Shaft Keys: Types, Materials & Applications- Your Ultimate …

This type of key is mainly using for light loads. It is suitable for shafts whose diameter ranges between 6mm to 60 mm. Saddle keys. All type of keys fits in the shaft and hub. But the saddle key is a little bit different from other keys. It only fixes into the hub. Flat and hollow saddle keys are two different types.

Keyed Shaft Design & Strength Analysis (ANSI B17.1)

Analyzing the key for other failure modes - crushing, fracture, etc. based on distortion energy theory. Optimizing the key dimensions to satisfy strength requirements while minimizing size and cost. Finish dimensions are finalized. Detailing the key-shaft interface for appropriate fit and position tolerances as per standards.

Design of Shafts and Couplings notes

Design and make a neat dimensioned sketch of a muff coupling which is used to connect two steel shafts transmitting 40 kW at 350 r.p. The material for the shafts and key is plain carbon steel for which allowable shear and crushing stresses may be taken as 40 MPa and 80 MPa respectively.

Types Of Mechanical Keys- Design Of Keys, Keyways

1) Sunk Key: used for heavy-duty application. a) Rectangular sunk key: for preventing rotation of gears and pulleys on the shaft. b) Gib headed key: used where the key to be removed frequently. c) feather key: Machine tool. 2) Saddle key: for light-duty or low power transmission. 3) Round key: Used for low Power drive.

Md-15 Keys and Couplings

Table 15.1. 5. Keys. It is a device that mechanically connects a member such as gear to a shaft. Most common type is a flat key. 2. Flat Key. 4. Fig. 15.2 Other types of keys. 6. …

Transmission Shaft with Key Shear Stress Problems …

F = π ω l. T = Fr. Where, F= the shear stress acting on the key, L= effective length of the key, ω= angular velocity of the shaft, r= radius of the …