# Mechanical Design

May 12th, 2015
Studypool Tutor
Price: \$10 USD

Tutor description

1. The 18-tooth pinion (#2) (Figure 1) drives a double-reduction gear train. Gears 3 and 4 are on same shaft. All gears have a 200 pressure angle. The pinion rotates CWat 1200 rpm and transmits 30 hp to the gear train. All gears are through hardened, milled from AISI 4140 Q&T at 10000 F, and have a face width of2.50 in

Word Count: 375
Showing Page: 1/11
Test 3 Mech DesignMEE 427: Mechanical DesignSpring Term 2009-10Test III1. The 18-tooth pinion (#2) (Figure 1) drives a double-reduction gear train. Gears 3 and 4 are on same shaft. All gears have a 200 pressure angle. The pinion rotates CWat 1200 rpm and transmits 30 hp to the gear train. All gears are through hardened, milled from AISI 4140 Q&T at 10000 F, and have a face width of2.50 in. Calculate (a) the diametral pitch (Pd) and pitch radii (R) of gears 2,3,4, and 5 (using the number of teeth and shaft center distances) and (b) the lowest factor of safety for the infinite life of the gear train using the bending fatigue and Gerber criteria. Use a Pd of3 irrespective of your answers in part (a).n 2., LOO rrM H p::. ?::C> hP':.).B:t;z.rJ.~F -= 2. ~.J_~+ 2PJ "'")& -1d=-3PtAJ-'1,riTo drivenmachineProblem # 1 cont ...(b)~~:::"-11.- = 20b:!J::(1:2n:sn'L ::- lz.ooq>rrt=: ~"'3HP-= sO krn:1::: 1100 f'f1V\";:: ()f -::2.5I.f0lA ~ 13'bkrs;2. Figure 2 shows the model of a shaft machined from AISI 4140 steel Q&T at 10000 F. An axial load P varying from 250 - 1900 Ib is applied at the disk. For infmite life of the bar, determine the fatigue factor of safety (nr) for the section 'A' using the Gerber theory. Given that (Kr)bending 1.70 and (Kr)axial 1.8. ==(30)1: ~ !qo::; Ib"'I..\l(CZi2-Slb~.~,,J\I,I.' DJIJ -'12.50Figure 2M,,- ~M/YI:::(BZS)(2. \$) ~ 2-a~ oz.)(1~7S)(2.S

## Review from student

Studypool Student
" Only issue was the guy's response time which was a bit long, which made me a bit anxious. Reached out to the help desk and they helped me out, turns out the tutors aren't all from US which meant there was a time difference. No issues on the quality. "

1828 tutors are online

### Other Documents

05/12/2015
05/12/2015
05/12/2015
05/12/2015
05/12/2015
05/12/2015

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors