Unformatted text preview: F—T O 3.25 Under normal operating conditions a motor exerts a torque of magnitude T; at
PROBLEM 325 F. The shafts are made of a steel for which the allowable shearing stress is 12 ksi and
have diameters of dew; = 0.900 in. and a'mﬂ = 0.800 in. Knowing that rD = 6.5 in. and
SOLUTION r6 = 4.5 in., determine the largest torque TF which may be exerted at F. rm 1' ‘2 1‘!" 5519+ F‘G: c =éd = 0.400 ‘m ‘ , J’E _, 'IT 5 Eu“ “6:?!  “2‘ C t” T
.—_ 1T(c>.m:o)3(lit\= Moe Lop m. ShacP'l: DE: c=éal= 0.950 in ' 7’77 kt‘P’lVI 1;)”: gig— (1.7177) : Lia'7 kipin AMOWaln/l’e quue 0'? Ti: is +an smdﬁef‘ T5414 :3 LIS? kiP‘I‘n ‘ 3.26 The two solid shafts are connected by gears as shown and are made of a steel
for which the allowable shearing stress is 60 MPa. Knowing that a 600 Nm—torque
TC is applied at C, determine the required diameter of (a) shall BC, (1)) shaft EF. SOLUTION Shelli” 8:7 Tc z 600 Nd" ) 21km: QOX'O‘ PO. ;T_c.__2_:
7') d' hitce  3.. 2:: : (2)5600}
C‘ ' 'IT’C “(Gomoﬁ c  13.53 xio’5m= $.53me Aéc=2c=32 [ mm : 6.3662: 10“ m“ a = gig—(coo): 375' Nm ¢3= % ’ £331.?) = 39737“; "‘3 c : £5,85W0'5 m = 5.83%.") 015;: 2c =3:,7m ...
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 Summer '10
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