4th Fir. Bfdg. 891 Galicia Sl cor;-esp/ipa Ave. SJrnpalOc (Tel. 742-56-00) 4 TH Fir. Villacatnpa-Capuras Bldg .• Sanciaj1gcxrSt • !" CItY (Tel .J!' If. 25+33-84) ,

" ',"

,SHARI j .. ><.-_ 1-! ""', ""'! DEFINITIONS:! i . , 1 ; Shaft -.. " .is a rotating member that is-used to transmit power. .,

where: P = power, Hp

Torque, -----".,--.. T

:§; T = FxR=FxD/

F = jipplied force

Shaft R = radius

stresses in shaft when subjected to pure torsion(Ss)

where:

A For solid shaft: Ss = Tc _1ST T- 1td 3

Coun1ter Shaft"

1 ; Driven Machine: ; -:s'" I! •

c. For shori shafts:

From Machineries Handbook

Shaft diameter for 0 degrees per foot of length of shaftdefiection. C9J

For English units:

0:::;; 0 ff or D;:; 4.

Where: 0 "" diameter,jn P :::;; horsepower N :: speed, rpm

P "'power, ttl' D:: diameter, in N "'speed, rpm T in-lb.

A. Shafting SUbjected-to nO'bendingadiott of pulleys except its own We'ight-i" L :: 8. 95 .. ') B. 'Shafting subjected to bar of pulleys, etc: L:::;; 5' frl, Where:"'" L ::: shaft length, ft ' D,;::: sha1ldiameter, in

Al(3INEe8INGREVIEW GENTER' Maniia, 4 111 Fir. Anacleta Bldg. 89t Steer. Espana Ave. SampalpcManila:.(fel. 742-56-00). ," " Cebu: ... ,"", Fir. Villacampa-Capuras ' aI99 " .• j St Cebu City"(fet : # 254-33-84) i ,:-/ {: .," ', ' '_',,:, __ ' : Des'igri Problem$.- DAY 2 '-1' ";":,-.- ' j TP PURE TORSION,6Nl. ,.,' .... (ME:8d. Oct 1998)Wha! pqwsr wouldiasp".indle§5 n:m hid. at 480,',rpm stress allowed for short shaft IS 59N/mm 2 ?'CMS, % \LW) 'i!IDL.. ' 2." (ME Bd. Apr. 98) Compute the diameter ot'a solid shaft 75 Hp at 1800 rpm. TI1 nature of theJqad and;the tYpe of servi,ce tliat the, a"owable Ss based on pure tqrsion is 6000 pSi.. :," ,,' . i 3. '(ME Bd. the torsional indegrees •. of a solid steel shaft, 110 mm OD x 1 m I0l19subjecfto 3. t x 106 N-mm ton;:tue. The modulus of elasticity is 80,000 N/mm-mm., • .. ','. ", .• ".' .'. '. '. ' 4. {ME Bd. Apr. linear, shaft diaroeter to tri:msmit 12 HP at 180 rpm with torsional deflection of degrees per length .. j ;"

ALe RCON ENGINEERING REVIE

4th Fir. Anacleta Bldg. 891 Galicia st. cor. Espana Ave. Sampaloc Manila Tel # 742-56- SHAFTING

PROBLEM SeT # 2

INSTRUCTION: Encircle the letter that corresponds to the correct answer of your choice.

M\JL TIPLE CHOICE:.

CENTER

I shaft is used to transmit 200 at 300 rpm by means of a 200 mm diameter sprocket Determine the

" force tangent to the sprocket. @

/." A 60 KN S. 60 KN C. 60 KN O. 63 KN Findthe diameter of a steel shaft which wil! be used persia a 110 KW motor rotating at 5 rps if torsional , stress is 90 Mpa. A. 60 nim. B 58 mm C. 38 mm O. 46 mm shaft has an ultima €I stress of 350 Mpa and has a factor of safety of 5. The torque developed by the shaft. is 3 KN-m and the diameter outsidea2eter is 80 mm. Find the inside diameter of the shaft. A. 83 mm B. 76 mm C, 69 mm D. 66 mm the speed of 63 mmsha nsmitted 75 'rWI/ if stress is not to exceed 26 Mpa, A 550 rpm B. 600 rpm C. 650 rpm D. 700 rpm ' A st shaft at 1400 rpm. If allowable stress is 500 psi, find the shaft diameter. A 3 in. B. . in. C. 1 in. D. 2 in. ' shaft of a motor as a length of 20 times its diameter and has a maximum twist of 1 degrees when twisted at 2 KN-m torque. If the moduius of rigidity of the shaft is 80 Gpa, find the shaft diameter. A 69 mm 8. 73 mm C. 64 mm D. 66 mm 7. A hollow shaft developed a torque of 5 KN and shaft s ressis 40 Mpa. If outside diameter of srlaft. is 100 mm, determine the shaft inner diameter. . A 68 mm S. 63 mm C. 58 mm D. 77 mm 8. A hollow shaft that has 100 mm outside diameter ana 0 mm inside diameter is lIsed to transmit 100 KW at

60t:], Determine the shaft stress..

A 13 Mpa 8.16 MPa C. 19 MPa D. 17 Mpa Wti' , the polar morhent tia of a solid shaft that tlU!::> a torque of 1 .5 KN and a stre, S5 of 25 Mpa? A 2· 6 m 4 8 .. Q2x10-6m 4 C,3-6m 4 0.1· 6 m 0. A force tangent to 1 foot di er pulley is 5 KN and is mounted on a 2 inches shaft.. Determine the '

E

o. 131 deflection if G =: 83 x 106 Kpa. . ,,/ A. 0°/m 8. O°/m C. 0°/m D. O°/m ... ;).1':'.. is the minimum diameter of a steel shaft which will be used to operate a 14 KN torque and will not / twist more than 3" in a length of :: 83 X 106 kPa).. A. 100 mm 8. 96 mm C. 118 mm D. 120 mm. A solid shaft 5 m long is stressed to pa when twisted through 4". Find the shaft diameter if G =6 83 GJ?a. ;// A 95 mm 8. 90 mm C. 101 mm D. 103 mm ........ ···/13. Compute the maximum unit shear in a 2 inches dia er steel shafting that transmits 24, 000 of torque o rpm.. .... /' 'A. 15,279 psi 8. 17,456 psi C. 14,233 psi D. 16,344 psi

//1'4... the of line that 150 't<MJ at 15 rps? I

/,,/ A. 2 In. 8. 3 In. C. 1 In. D. 2 In. /'15. A In shaft has 50 mm diameter is running at 300 rpm. What is the power that could be deliver by the shaft,. /'/ A. 30 hp \§) 28 hp C. 32 hp D. 16 hp ' A 2 inches diameter main shaft running at 600 rpm is mounted by a 12 inches diameter pulley and is Ulen , connected to the shaft of driven machine mounted by a 40 inches diameter pulley by means of a belt. The beit efficiency is 90%. Find the the short shaft.

A. 4 inches 8. 3 inches U inches D. 1 inches

1" diameter Sl]haft is used to transmit 44 hp. Determine the shaft speed. "A/SOO rps 8. 8 C. 400 rpm D. 450 rpm 1 diameter soli ft is desired to replace a hollow shaft having 4" outside diameter. Consider the /' strength to be the same, inside diameter of hollow shaft. A. '2 in. B. 3 in. C. in. D. 4 in. 1 is used to drive a centrifu ump that discharges 3000 Hlmin at a head of 10m. The pump

efficiency is 68% and running at 550 rpm. Find therfl0nal stress of shaft if shaft diameter is 35 mm. . A. 13 MPa B. 11 MPa C. 12 MPa D. 4 Mpa. saw blade has a circular speed of 25 mls nd 500 mm diameter is driven by a belt that has a 7%. Find the required speed of driven shaft if speed ratio is 3.. A. 954 rpm B. 2533 rpm C. 3542 rpm D. 3015 rpm 2',1. 0 mm diameter circular saw blade is driven by a 1800 rpm motor with gear speed ratio of 1. Find speed of the blade. B.140 C.132/sec D.135 machine shaft is supported on bearings 1 m apart is to transmit 190 IWV at 300 rpm while subjected to /' bending load of 500 kg at the stresses 40 Mpa, determine the shaft diameter. A 100mm B C D
mm diameter shaft is subjecte to a torque f 6 KN and bending moment of 2 KN. m. Find the m um bending stress developed. A. 45 MPa B. 60 MPa C. 50 MPa D. 55 Mpa t has a length of 10 ft. Find the diameter of the shaft that could safely deliver. A. t18in B.7 C.2 D. 1,64in shaft is running at 260 rpm. vynat that this s!:l could safely deliver?.. A. .37 hp B. 5 hp C. 4 hp D. 2 hp

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319325474 Mechanical Engineering Reviewer Machine Design pdf

Course: Machine Design 2 (MEEN 3254)

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University: Polytechnic University of the Philippines

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! . ALCORCQN

ENGINEERING

4th

Fir.

Bfdg.

891

Galicia

cor;-esp/ipa Ave.

SJrnpalOc

(Tel.

742-56-00)

Fir. Villacatnpa-Capuras Bldg

.•

Sanciaj1gcxrSt

CItY

(Tel

If.

25+33-84)

•

.J!'

2 . "

',"

,SHARI

.. ><.-

1-!

""',

""'

DEFINITIONS:

! i

. ,

1 ;

Shaft - .

.is

a rotating member that

is-

used

to transmit power .

. "

where:

P =

power,

Torque,

-----".,--

:§;

T =

FxR=FxD/2

F = jipplied force

Shaft

R = radius

3. stresses

shaft when subjected to

pure

torsion(Ss)

where:

A For solid shaft:

_1ST

T-

1td

Coun1ter

Shaft"

; Driven

Machine:2

;

-:s'"

! •

Why is this page out of focus?

This is a Premium document. Become Premium to read the whole document.

ALe

RCON

ENGINEERING REVIE

4th

Fir.

Anacleta

Bldg.

891

Galicia

st.

cor.

Espana

Ave.

Sampaloc

Manila

Tel

742-56-00

SHAFTING

PROBLEM SeT # 2

INSTRUCTION: Encircle the letter that corresponds to the correct answer of your choice.

M\JL

TIPLE

CHOICE:

CENTER

I shaft is used to transmit 200 at 300 rpm by means of a 200 mm diameter

sprocket

Determine the

" force tangent to the sprocket. @

/."

A 60.44

60.33 KN

60.88 KN

63.66

Findthe

diameter

a steel shaft which

wil!

be used persia a 110 KW

motor

rotating at 5 rps if torsional

, stress

Mpa.

60.20 nim . B 58.30 mm

38.30

46.20 mm

shaft has

ultima

€I

stress

350

Mpa

and has a factor

safety of

The torque developed by the

shaft.

is 3 KN-m and the diameter

outsidea2eter

is 80

mm.

Find the inside diameter of the shaft.

83.45 mm

76.45 mm

69.62

66.34 mm

the speed

63.42

mmsha

nsmitted

'rWI/

stress

not to exceed

Mpa,

550

rpm

600 rpm

650 rpm

700 rpm '

A st shaft

1400

rpm.

allowable

stress

500

psi, find

the

shaft

diameter.

3.58

in.

..84

in.

1.65

in.

2.54

in.

shaft

a motor as a length

times its diameter and has a maximum twist of 1 degrees when

twisted at 2 KN-m torque.

the moduius

rigidity of the shaft is

Gpa, find

the shaft diameter.

A 69.23 mm 8. 73.23

64.23

66.33 mm

A hollow shaft developed a torque

5 KN and shaft s

ressis

40 Mpa.

outside diameter of

srlaft.

is 100

mm, determine the shaft inner diameter.

. A 68.43 mm

63.28

58.38

77.64

A hollow shaft that has 100 mm outside diameter ana 0

inside diameter is lIsed to transmit 100 KW at

60t:],

Determine the shaft stress. .

A 13.73

Mpa

8.16.82

MPa

19.86 MPa

17.21 Mpa

Wti'

, the polar morhent tia of a solid shaft that

tlU!::>

a torque of 1

and a

stre,

S5 of 25 Mpa?

2.46x10·

6m4 8

Q2x10-6 m4

C,3.46x10-6

0.1.24x1O·

A force tangent to 1 foot di

pulley is 5

and is mounted on a 2 inches

shaft..

Determine the '

o .

131

deflection

G =: 83 x

6 Kpa .

,,/

0.804°/m

O.654°/m

0.786°/m

O.938°/m

...

;).1':'..

is the minimum diameter

a steel shaft which will be used to operate a 14 KN.m torque and will not

/ twist more than 3" in a length

:: 83 X 106 kPa) . .

100.64

8. 96.80

118.45 mm

120.72

A solid shaft 5 m long is stressed to pa when twisted through 4". Find the shaft diameter

GJ?a.

;//

95.46

8. 90.42

101.32 mm

103.54

........

···/13. Compute the maximum unit

shear

in a 2 inches dia er steel shafting that transmits

24,

000

torque

o rpm. .

....

'A.

15,279 psi 8. 17,456 psi

14,233 psi

16,344 psi

//1'4..

. the

line that 150

't<MJ

at 15

rps?

/,,/

2.28

In.

8. 3.54 In.

1.62

In.

2.06

In.

/'15.

shaft has 50 mm

diameter

is running at 300 rpm. What is the power that could be deliver by the

shaft, .

/'/

30.40 hp

\§)

28.60

32.50 hp

16.42 hp

' A 2 inches diameter main shaft running at 600 rpm is mounted by a 12 inches diameter pulley and

Ulen

, connected to the shaft

driven machine mounted

a 40 inches diameter pulley

means of a belt. The

beit efficiency is 90%. Find

the

the short shaft.

4.23 inches 8. 3.23 inches

U.25

inches

1.45 inches

319325474 Mechanical Engineering Reviewer Machine Design pdf

Machine Design 2 (MEEN 3254)

Polytechnic University of the Philippines

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!. ALCORCQN ENGINEERING

ALe RCON ENGINEERING REVIE

CENTER

" force tangent to the sprocket. @

60t:], Determine the shaft stress..

E

//1'4... the of line that 150 't<MJ at 15 rps? I

A. 4 inches 8. 3 inches U inches D. 1 inches

kr

-

It.

1

319325474 Mechanical Engineering Reviewer Machine Design pdf

Course: Machine Design 2 (MEEN 3254)

University: Polytechnic University of the Philippines

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This is a preview

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