1 August 15, 2007 1 15. Couplings and Keys Objectives • Recognize different types of keys and their standard sizes. • Size keys for appropriate structural loads. • Recognize many types of

Shafts Keys and Couplings MCQ Question 1 Detailed Solution Concept: So, the factor of safety using Tresca's theory (Maximum shear stress theory of failure) τ τ F. O. S = τ τ m x . (1) Where Tmax = The maximum shear stress, τ = The shear stress developed in the shaft due to maximum torque transmission τ τ = 16 T π d 3

solution the torque that can be transmitted by the shaft is 3 3 8000 ( 6 ) 339,292 in.-lb tr j d t j r 16 16 the horsepower is 339,292 (900 ) 4845 hp 63,025 63,025 tn hp the force transmitted through the key is ( / 2 ) 3 / 3 339,292/3 113,097 lb t f d f f t the shear and bearing areas of the key are 1.5 s a wl l and / 2 / 2

Keys and Coupling 489 Since the service factor is 1, therefore the maximum torque transmitted by the shaft, Tmax = 1 × 159 = 215 N-m = 215 × 10 3 N-mm We know that the torque transmitted by the shaft ( T ), 215 × 10 3 = 16 s dd 331640 ππ×τ × = × × = 7 d 3 ∴ d 3 = 215 × 10 3 / 7 = 27 × 10 3 or d = 30 say 35 mm Ans.

The failure of the R.G. Blower occurs due to the failing of the coupling used in the blower. Presently Grid Coupling is used in the blower.

Press fit keys dowel pins and splines. . Design based on rigidity is to ensure that maximum deflection because of bending and maximum twist 

of saddle keys, friction between the shaft, key and. 3 IS 2048-1983: Specification for Solution. Given kW = 15 n = 720 rpm Su=460 N/mm2. (s)=3 d=25 mm.

View key-and-coupling.pdf from BSME 101 at Polytechnic University of the Philippines. Machine Design 1 MEEN 30314 Problems in Key and Coupling Submitted to: Engr. EDWIN C.

Recitation 7–Key and Coupling Examples - SolutionsKey Example 1A 63.5 mm-diameter shaft is fixed to a gear hub with a16 16 mm key. The shaft material has 

Que material for shaft & key are taken as same. Torque transmitted by key = Torque on shaft. To avoid these problems flange couplings are used.

Crushing failure of flat keys​​ Sc = compressive stress (lb/in2) = Sy t = total height of the key (in.) A ½-inch shaft transmits 5 hp at 1750 rpm.

SECTION 8 – KEYS AND COUPLINGS FLAT AND SQUARE KEYS DESIGN PROBLEMS 521. Solution: For AISI 1137 shaft, Table AT 8, sy = 93 ksi Yield Strength of Shaft 

The. hubs of the coupling are each 111mm in diameter, 92 mm thick. and the flange webs are 19 mm thick. Six 16 mm blots in a. 165mm diameter bolt circle connect the flanges. The keyway

01/07/  · When it comes to vibration, the devil’s in the details. While it’s pretty easy to pinpoint misalignment, propeller issues or a bent shaft, less conspicuous components like shaft couplings, keys and keyways can also cause issues. In mechanical engineering, keys connect rotating elements, in this discussion, couplings to shafts. The key sits in a keyway,

03/10/  · Here are six common mistakes made in assembly and maintenance of flexible couplings. Misalignment— While couplings are designed to allow some misalignment and varying degrees of flex, excessive misalignment between joined shafts is one of the most common reasons for failure. Often, a mechanic will not check the alignment before installing a

ii) the shaft diameter on the basis of torsional rigidity. Compare the results of these two examples and comment on the results. Solution. Given G = 79 300 N/ 

Key is used to transmit torque between shaft and the component mounted on the shaft. Square and flat keys are most common. Other types of keys Key size Actual stresses acting on keys are difficult to determine Simplified mechanical stresses equations for shear and compression Tangential Force at shaft diameter: F= T/(D/2) = 2T/D

Keys, Couplings and Seals Material taken for Mott, 2003, Machine Elements in Mechanical Design Keys zA key is a machinery component that provides a torque transmitting link between two power-transmitting elements. zThe most common types of keys are the square and rectangular parallel keys. With the square being the most common.

Hello Dear Students,. Engineering design is the method that engineers use to identify and solve problems. It has been described and mapped out in many ways, 

Key has lowest yield strength. 4T 4(87.65) L= = = 6.59 in sc tD 71(3 8)(2 ) Use L = 6.59 in (c) Either of the above is not to be discarded since they are designed based on yield strength with

Mechanical Engineering questions and answers; PROBLEM ON TOPIC "KEYS AND COUPLINGS": A coupling with material AISI C1045 as rolled transmits 65.5 HP at 1750 rpm. The material of the 1 .75 inch shaft is also AISI C1045 as rolled and the key is cold drawn AISI C1020. N= 2.5.

Test: Shafts, Keys & Couplings - 1 - Question 8 Save Some of the mechanical properties are 1. sufficiently high strength 2. low sensitivity to stress concentration 3. wear resistant 4. good machinability 5. ability to withstand shock and impact loads The desirable properties for a shaft and axle material are A. 2 and 4 B. 1,2 and 3 C. 1,2 and 5 D.

Key and Coupling Solutions. Mark Hilarion. Keys and Coupling (Design for a Simple Rigid Flanged Coupling) кяatos Insatiabilis. Design of Flexible Coupling. wille333. Tutorial-6 Couplings -

The device provides an ultimate solution by incorporating all the advantages of great difficulty, while if a shaft carries a sleeve or gear with a key 

Couplings and Keys Objectives • Example Problem 15-1: Design of Keys • A ½-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

A square key is to be used in 40 mm diameter shaft and that will developed a 2 KN-m torque. If bearing stress of the key is 400 Mpa, determine the cross sectional dimension of square key to be used if key length is 30 mm. Answer: D A. 324 mm B. 246 mm C. 446 mm D. 277 mm; A 100 KN force is acting on a key that has a length of 4 times its height.