1) You have the gear below. If the maximum allowable stress is 20ksi, what is the maximum torque that the gear can transmit at low speed (i.e. you may ignore the velocity factor)? Pressure Angle: 20 Gear Pitch: 20 Number of Teeth: 20 1.100in 1.000in Pitch Diameter MA www -0.500in 0.840in 0.440in 0.940in 0.500in MCMASTER-CARR CAD PART NUMBER http://www.mcmaster.com 2022 McMaster-Carr Supply Company Information in this drawing is provided for reference only. 5172T12 Metal Gear - 20 Degree Pressure Angle 2) You want to make this involute gear. How should you make it? Hobbing or shaping? O 3) Skylab was the first US space station. It was built from the 3rd stage of a Saturn V rocket. It was launched by a special variant of the Saturn V rocket consisting of only the first and second stages. Item Skylab 1st 2nd Dry Mass 76,540 130,000 36,200 What delta V does the rocket impart to Skylab? Propellant N/A 2,150,000 443,000 Isp N/A 263 421 4) You're using a 6003 ball bearing. You want it to last 15 million revolutions. What is the allowable radial load? Ball Bearing Open, Trade Number 6003, for 17 mm Shaft Diameter 2-D PDF 300.000 6011 de 170000 She Trade Number: 6003 MCMASTER-CARR 5972K311 Beng $9.28 Each Delivers tomorrow 10 am-12pm 5972K311 CAD 3-D Solidworks Streamline your design process with our Solidworks Add-In Available for Solidworks 2017 or newer Bearing Trade Number Bearing Type For Load Direction Construction Seal Type Inner Ring Type Ball Bearing Type For Shaft Type For Shaft Diameter ID ID Tolerance For Housing ID OD OD Tolerance Width Width Tolerance Ring Material Ball Material Cage Material Radial Load Capacity, lbs. Dynamic Static Maximum Speed Lubrication Lubricant Shaft Mount Type Temperature Range ABEC Rating Radial Clearance Trade No. Radial Clearance Specifications Met RoHS REACH ADD TO ORDER 6003 Ball Radial Single Row Open Standard Standard Round 17mm 17mm Each -0.008mm to Omm 35mm 35mm -0.011mm to Omm 10mm -0.12mm to Omm Steel Steel Steel 1,300 730 28,000 rpm Lubricated Download Download Add-In X Oil Press Fit -20 to 230 F ABEC-1 C3 0.011mm to 0.025mm DIN 625-1 RoHS 3 (2015/863/EU) Compliant REACH (EC 1907/2006) (07/08/2021, 219 SVHC) Compliant UNIT CONVERSIONS AND USEFUL TABLES: 1 lbm = 0.454 kg 1 in = 25.4 mm (this is an exact value) 1g 9.81 m/s 1 lbf = 4.448 N df 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 For example, the t value for 18 degrees of freedom is 2.101 for 95% confidence interval (2-Tail a=0.05). 90% 80% 0.100 v.20 0.20 95% 90% 0.050 0.10 0.10 Student's t Distribution Table 99% 99.5% 99.95% 98% 99.9% 99% 0.005 0.010 0.0005 0.02 0.01 0.001 3.0777 6.3138 12.7062 31.8205 63.6567 636.6192 1.8856 2.9200 6.9646 9.9248 31.5991 4.3027 3.1824 1.6377 2.3534 4.5407 5.8409 12.9240 1.5332 2.1318 2.7764 3.7469 4.6041 8.6103 3.3649 4.0321 6.8688 2.0150 1.9432 1.4149 1.8946 2.3646 1.4759 1.4398 2.5706 2.4469 3.1427 3.7074 5.9588 2.9980 3.4995 5.4079 1.3968 1.8595 2.3060 2.8965 3.3554 5.0413 2.2622 2.8214 3.2498 4.7809 2.2281 2.7638 3.1693 4.5869 1.3830 1.8331 1.3722 1.8125 1.3634 1.7959 2.2010 2.7181 3.1058 4.4370 3.0545 4.3178 1.3562 1.7823 2.1788 2.6810 1.3502 1.7709 2.1604 2.6503 3.0123 4.2208 1.3450 1.7613 2.1448 2.6245 2.9768 4.1405 1.3406 1.7531 2.1314 2.6025 2.9467 4.0728 1.3368 1.7459 2.1199 2.5835 2.9208 4.0150 3.9651 1.3334 1.7396 2.1098 2.5669 2.8982 2.1009 2.5524 2.8784 3.9216 2.0930 2.5395 2.8609 3.8834 2.0860 2.8453 3.8495 1.3304 1.7341 1.3277 1.7291 1.3253 1.7247 1.3232 1.7207 1.3212 1.7171 1.3195 1.7139 1.3178 1.7109 1.3163 1.7081 1.3150 1.7056 1.3137 1.7033 1.3125 1.7011 1.3114 1.6991 1.3104 1.6973 97.5% 95% 0.025 0.05 0:05 = 0.025 1 2.0796 2.0739 1 2.5280 2.5176 2.5083 2.4999 2.0687 2.0639 2.4922 2.7969 2.0595 2.4851 2.7874 3.7251 2.0555 2.4786 2.7787 3.7066 2.0518 2.4727 2.7707 3.6896 2.0484 2.4671 2.7633 3.6739 2.0452 2.4620 2.7564 3.6594 2.0423 2.4573 2.7500 3.6460 2.8314 2.8188 3.8193 3.7921 2.8073 3.7676 3.7454 = 0.025 tvalue 1-Tail Confidence Level 2-Tail Confidence Level 1-Tail Alpha 2-Tail Alpha 1 LEWIS FACTOR - Y NO. OF TEETH 10 11213141516718192022 24 26 28 30 32 34 ****4**8*R*===:88 36 38 40 45 50 55 60 65 70 75 80 90 100 150 200 300 RACK 14 1/2 20 INVOLUTE INVOLUTE 0.176 0.192 0.210 0.223 0.236 0.245 0.255 0.264 0.270 0.277 0.283 0.292 0.302 0.308 0.314 0.318 0.322 0.325 0.329 0.332 0.336 0.340 0.346 0.352 0.355 0.358 0.360 0.361 0.363 0.366 0.368 0.375 0.378 0.382 0.390 0.201 0.226 0.245 0.264 0.276 0.289 0.295 0.302 0.308 0.314 0.320 0.330 0.337 0.344 0.352 0.358 0.364 0.370 0.377 0.383 0.389 0.399 0.408 0.415 0.421 0.425 0.429 0.433 0.436 0.442 0.446 0.458 0.463 0.471 0.484