Gear Definition and 402 Threads

Hello, I want to design two stage 200 kilowatt helical gear. Ratio that I want is 1:8. Input rpm 1250 with medium shock. Can anyone help me. Or suggest me any free software where I can get gear design.

Hello,I have been trying to wrap my mind around this question for a long time.So I thought it is best the way to share it with you. For a given car speed,the greatest acceleration comes when we are at peak horsepower RPM.This is true for any gear except the first gear.Because in any other...

I am an American author, working on a revision for my Theory of Machines textbook. In the past, I used only US Customary units, but now see a need to introduce SI units. This is particularly a problem with regard to gear standards. An internet search shows that there are dozens of SI-based gear...

Homework Statement Homework EquationsThe Attempt at a Solution for this class, we were not taught with contact ratio equations, nor the pressure angle is given, so for this type of problems, do we just assume that minimum number of teeth on a pinion will be 12? 3 integer factors of 180 can...

Homework Statement Homework EquationsThe Attempt at a Solution if you do 38*25/pi , you would get 302.394 for the exact pitch circle diameter, similarly, exact d2 should be 907.183 mm, is it a typo? or did I miss something?

1.Why does the angular speed of small gear depend only on larger gear only? 2.Why does the length of linkage connecting two gears does not have any influence on the angular speed of smaller gear? The first question can be answered by looking at slack and tightening of chain caused by rotation...

Trying to calculate how to produce a 1:12 ratio gear train with epicyclical gears. Can anyone send some equations or links to help explain how to do this? I have looked in textbooks and online and found many examples of achieving this with a simple compound spur gear train with 3 or less stages...

Homework Statement Okay, so this isn't so much a problem as a design issue while following an example given in a book. (Relevant material is here: http://www.aero.us.es/adesign/Slides/Extra/Stability/Design_Control_Surface/Chapter%2012.%20Desig%20of%20Control%20Surfaces%20(Elevator).pdf ) Now...

Hello, I need a quick clarification on how the differential works. I understand its purpose and how it operates but I am not sure how, when a car is turning, the spider gear starts spinning to provide the outer wheel with a higher angular velocity? Is it simply because the outer wheel starts to...

Hi guys badly needed your help, i need to rotate the engine assy. with a mass of 500 kg using a steering wheel so i need to define what is the right gearbox, please be noted that it will be manually rotated by a person see attached drawing for your reference I'm hoping for your quick...

So I've found the following formula for calculating the gear ratio of a planetary gear. Tr Turns of the ring gear Ts Turns of the sun gear Ty Turns of the planetary gear carrier R Ring gear teeth S Sun gear teeth P Planet gear teeth ( R + S ) ×Ty = R × Tr + Ts × S The example I saw on the same...

SO, here is the case guys. I have a mechanism to turn plate by a motor. Both motor and plate was connected through 2 spur gears. But here is the problem, when wind strike the plate, the plate start to rotate even without the power of the motor. What is the best way so i can prevent the plate...

Dear Forum, Please see the attached file below. I have trouble understanding what happens at the light green gear which drives the big brown one. I read somewhere that the force that the belt applies on the surfaces of the two pulley's is the same, so 353, 68 Nm. The torque and rpm on both...

I'd like to know if there's a power transfer loss depending on how gears are connected and placed relative to each other. For the two distinct image down below, imagine ALL GEARS HAVE EXACTLY THE SAME DIAMETERS and the setup is such that the viewers are seeing the top (aerial view) and the gears...

How can I determine if a single worm gear reducer will backdrive? The gearbox has a 15:1 ratio which has around 90 percent efficiency. The gearboxes output shaft also turns a pair of sprockets that creates a 3:1 ratio. This in turns 8" inch diameter steel wheel on a 28000lb trolley, that rides...

Hey guys I do apologize in advance for any errors or misunderstandings in my question, been that english is not my native language. I was wondering how to calculate the RPM of a gear (or a wheel) applied with a known force. I'm guessing I'm not using the correct terminologies using Google...

Hi. I have a question about output torque and efficiency of a simple gear pair as shown on the picture. So, I have a pinion and a gear. I give an input torque Tp in the clockwise direction. Therefore, the pinion will rotate with ωp angular velocity in clockwise and the gear ωg in...

Hello, I am very new to gears I am fairly confused about planetary gears. I want to know the load on the gears contact point between the sun and the planets and the planets and the ring, assuming the ring not moving. Given I have the solid works file ,the pressure angle, and the gear ratios, I...

Homework Statement A constant torque is applied to a pinion which has a moment of inertia of I_m. The pinion(A) drives two gears, one (B) which is connected to a mass which has a moment of inertia = I_m and the other(C) is connected to a mass which has a moment of inertia = 2I_m. The gear...

Homework Statement A shaft is being used as a cantilever and is held in the housing by its fit. It is to remain static whilst a gear is attached to the free end, how to you retain the gear on the free end of the shaft? Sketch a suitable method Homework Equations n/a The Attempt at a Solution...

hello. I'm tring to find a compatible sprocket for my chain. I need to know what these abbreviations mean here: http://www.ebay.com/sch/i.html?_odkw=sprocket+40&_sop=15&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xsprocket+40+3%2F4.TRS0&_nkw=sprocket+40+3%2F4&_sacat=0 For...

I would like to calculate the gear ratio of this moonphase watch, however i cannot calculate the exact day of its mentioned. What's wrong with my calculation? https://www.ochsundjunior.swiss/watches/moon-phase/tech-specs/ my calculation is 1/(2/12*14/18*14/109)/2=30.03 which is different from...

Hi guys, How would I go about calculating gear speed in rpm? If I know the input shaft speed, output shaft speed, gear ratios and tyre size. Thanks.

I'm trying to calculate the required gear sizes for the system shown below: The driven wheel is connected to a 600mm diameter bicycle wheel and the driver wheel connected to a 580 mm long lever arm which has a forward driving force of 40 N. I want to calculate the most efficient sizing of...

Hi there, I am modelling a four degree of freedom system which is the dynamics of two spur gears in mesh, having two rotational and two translation degrees of freedom, respectively, a diagram exhibiting the system can be seen below. I have derived the equations of motion (EOM) and...

I am planning to design a reciprocating rack and pinion, as shown in this figure I plan to attach a cutter to this setup to cut anything.I need to know how to calculate the motor specifications for the given mass of the gear, cutter and cutter velocity I plan to make it with a plywood

I want to find how far a gear from a rack and pinion will rotate from the displacement of the rack and the angle that it will have turned using: s=r*angular displacement. So what is the radius in this case?

Homework Statement why we need to consider 2 moment caused by the 85Nm in this question ? The question ask for the determine the angle of twist of gear A relative to D . Homework EquationsThe Attempt at a Solution Why shouldn't the angle of twist = (85)(0.4) / ( (0.5pi)( 0.015^4-...

I'm finding it a bit too confusing to imagine how it actually would look like. But once I understand that, I'd easily be able to solve the problem! link: http://i.imgur.com/DApJzGx.jpg The attempt at a solution: I'm thinking that the dotted line might be the place where the gears mesh...

Homework Statement : [/B] Qstn no. 3.10 in the attached image. [ Moderator note: Copy of relevant portion of attachment inserted to make it visible here] Homework Equations : For power calculation, [/B] Power = torque * angular velocity... Also, reduction gear is used to deliver lower outout...

Hello. I need to calculate spur gear transmissions. I need a bit of guidance for the first steps. The data is the next: n= 1000 rev/min Mt torque= 28.65 Nm i transmission ratio= 4 P load in the shaft= 3kW I am a bit lost to star selecting the material (depending the load and work...

I am calculating the amount of torque required to give mobility to a 7000 lbs oilfield service vehicle. The vehicle has a rectangular frame with fairly even weight distribution. The radius, from wheel center to edge of tire is 11.5 inches. These tires are treaded with various half-inch tall...

Homework Statement Gear 2 in the figure below is driven at a speed of 80 rpm in the CCW direction viewed from the right end. Gear 4 meshes with a fixed ring gear (gear 7) and with gear 5. Find the angular velocity of gear 5. N2= 16 T, N3= 32 T, N4= 30 T, N5= 22 T and N7= 77 T. Homework...

Hi everybody, I'm working on an analysis model of flexible gear in ANSYS workbench. This model has 3 components: flexible gear(FG), wave generator(WG) and rigid gear(RG) Applied force have two case: WG makes FG deforming from circular shape to ellipse shape, the FG contacts and engages to RG...

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...

Hi all. What does the voltage rating in each category I/II/III/IV actually mean? For example, my multimeter is Cat III rated to 300V. Is this RMS? Peak? Peak-peak? Our supply here is 230V RMS AC, but this means the momentary peak is about + and - 330V (relative to neutral/ground) and the...

Homework Statement My professor said that we needed to acquire a program that can solve the equation: I have not had any success. Can anyone point me in the right direction? Homework Equations 73.09 < (N3N5)/(N2N4) < 73.11 The Attempt at a Solution

In general calculations of gear design, addendum is taken as a factor of the module of the gear such as equal to module or 0.8 times the module and dedendum is taken as 1.25 times the module. Why are both these defined in terms of module? How did we reach to this conclusion?

I used to know this back when i worked with Flash animation, but I'm working on a 3D printer now and I've forgotten, when you have a set of teeth, on a linear shaft and a gear, do you base the unrolling of the gear, for the spacing, on the inside of the teeth, the outside of the teeth, or the...

Hello I am using two motor which are coupled with the mechanical coupling. The coupling has moment of inertia. The gear ratio of both motors is same 26:1. I want to know i also need to divide the coupling moment of inertia with the gear ratio? Thany

I am newbie in the area of clutches. I am making a motorized cable reel (DC motor) which I needed to make it easy for anyone to pull the cable reel out manually without much effort. Only pulling the cable out is manual. The retraction of the cord is done automatically via the DC motor. So, based...

Homework Statement Hi there, I am doing a project for my physics class where I am attempting to calculate the amount of force and work required to go up a 10% grade hill in a variety of different gears and I am running into a lot of issues. I have already collected my data and have calculated...

Hello i am having trouble figuring out the proper profile to use for the worm and the gear. I need to model it in solidworks and everything i am finding online is for spur gears. I need to get the worm and gear to mesh correctly so i can do some finite element analysis on it. I have calculated...

I need some math help. I am very good with my hands and building mechanical things, but not-so-good with math calculations. ( I got a D in high school physics but can fix damned near anything...) I would appreciate some help figuring this out. I have attached a diagram showing what I am trying...

This is a servo horn. I'd like to make my own if possible, but I have a hard time figuring out how in the world they make the teeth inside these parts. I'm not really sure what to ask in google.

Homework Statement What is the angle of twist at gear A relative to the motor? (Round to the closest 6th decimal) Homework Equations I know to find the angle its θ = ∑ (TL/JG) but it can also be θ = Lτ/Gr The Attempt at a Solution So i used both these equations, and I got...

So, great site. I have a quick question that I think has a simple answer. On a snowmobile forum I visit there has an ongoing debate. The question is, all other factors being the same, does changing the lug height on a track, change the final drive ratio of the snowmobile? I think I know the...

Hey Guys, So in the attached image I'm trying to determine what the rpm of the 60 tooth gear will be given the 8.4" tire will be rotating at .68 rpm, everything else is just an assumption on my part. I'm assuming the following which is probably wong: The tire being rotated at .68 rpm will...

The gear ratio is the ratio of angular displacement, angular velocity, angular acceleration, torque etc of the input with respect to output. However, I would like to know that which of these variables will be scaled exactly to the gear ratio in reality, as there might be some friction in the...