Gear Definition and 402 Threads

Homework Equations e=(product of number of driving teeth)/(product of number of driven teeth) e=(n_{out}-n_{arm})/(n_{in}-n_{arm}) The Attempt at a Solution e=(N_{p1}/N_{s1})*(N_{s2}/N_{p2}) e=1.25926 e should be 0.7941 however From there out it seems pretty trivial. I just need...

Guys, I've just come across this question regarding planetary gear train. I was asked to find the rpm of a gear within the train. but the solution given doesn't include the carrier speed within the calculations. I was asked to find the rpms to gear 4. The carrier is between 4 and 6. What...

Hi, I want to build a simple clock of gears. How I can build a simple gear at home. Thank you...

I am designing a gear train for my basic mechanisms class that consists of three shafts. The input horsepower is 10 and rpm is 1750. I calculated the torque of the first shaft to be 360 but I am not sure if the horsepower stays the same throughout the whole train or not. The first shaft has a...

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I have studied how gear trains work for a project I am working on, but can't find an analogous situation where the forces in the gear train oppose each other. Can someone help me? I have a 2:1 gear ratio on a dual rack and pinion gear train connected to opposing pistons, and there is equal...

if we keep a spring attached to a trolley on moving vehicle we find the force by f=kx and the potential energy by 1/2kx^2. thus we calculate the friction, the slope of the road and device an system to automatically change gear.we already know the petrol consumed, speed and acceleration and...

I need to lift 75 pounds when only using 4 pounds of force. Is there a gear set or pulley system that can do that? Thanks

Hi all, I always wondered if the combination of gears used to achieve a specific gear ratio mattered. Assuming the desired gear ratio is 3:1, would it matter if the gears used were 10x30 or 9X27? Thanks in advance.

Homework Statement I am having difficulties with finding the acceleration at A. In the picture above are the questions that I need help with.

I have to do optimization of a landing gear of an aircraft but can not find anywhere sketches of the landing gear. Can anyone tell me where I can find these drawings? I must be detailed drawings to build the landing gear in Catia.

Automobiles -- why not to remain in 1st gear? why not to remain in 1st gear ??

Homework Statement A belt conveyor with a 1-foot diameter is driven by an electric motor. The conveyor must travel at 300 linear feet per minute while the motor turns at 1760 RPM. Design a gear train to connect the motor and conveyor and choose gears from McMaster-Carr. Homework Equations...

Homework Statement In a bicycle, the ratio between the size of the wheel sprocket to the size of the crank sprocket is 2.5 which means... An example of one of the answer choices is: The rear wheel turns ___ times for every full rotation of the pedals. Homework Equations The...

Hi guy I try to understand how should I calculate the force on a wheel with known radius which is driven by a motor with a known torque and rational speed, in between three gears with known radiuses. Does the number of gears matter for the torque and so for the force on the wheel? (100%...

Hello please see my problem below, 1. A gear train is to be designed to transmit power from shaft 1 to shaft 2 with the following condition: (i) Shaft 1 (driven by an electric motor) rotates at 100 revs min–1. (ii) Shaft 2 is to rotate at 400 revs min–1 in the opposite direction to shaft 1...

I am still trying to visualize horsepower and torque seen on the racetrack, and its hard. Obviously torque is a component of horsepower. Without enough torque, a car would take forever to reach its power-band. With a lot of torque, but merely no horsepower, a car would have a very steady...

Hello all: I have a quick question concerning a variation of a planetary gear train I am working on. If I want a sun gear and then two planetary gears in between the sun and ring gear (like is shown in the attached picture), how do I find the number of teeth for the ring gear? Would the...

Our lab is looking at designing a new ECAP machine (Equal Channel Angular Pressing). It needs to be driven by an electric motor attached to a gearbox. From their modeling and data collected from their existing ECAP machine they are requesting the output shaft on the gearbox to have a 2,000,000...

Hi, This may not being the right place for this but I'm giving it a shot I'm trying to figure out how to make a gear indicator for our university's formula SAE car. I just finished my freshman year and came in without any credits so I have a very limited knowledge of applying programming to a...

Hello, I'm working on calculating a torque value for an engineering project at a new internship I started. Basically there is a spinning gear wheel similar to the picture I posted below (but thicker/cyclindrical), and I need to calculate the force or torque applied on a locking bolt that...

Hello, I am blanking on the equations I should use to calculate the stress through a section of a gear. I would like to be able to calculate the thickness of trepanned gear. Hopefully the attachment helps show what I am looking for. The area between the arrows needs to be minimized...

Homework Statement in the system of gears the larger gear of radius 1m and mass of 2kg is about to mesh with the smaller stationary gear of radius 0.5m and mass 1kg at the instant of meshing the speed of a point on the circumference of the larger gear is 50m/s both gears are free from the...

I have this conveyor which I am trying to automate i.e. It runs for 5 secs and have a pause of 3 sec, this process is continuous. I am creating a mechanism where I have a gear of dia 200mm which is fixed (i.e. I can't change its dia) and it is attached to a conveyor. Now I am introducing a...

Hey, I am new to this forum hoping that I can get some help with a project. I also hope to be accepted as a new member, hopefully learning from everyone here. I am sorry to ask a simple question that may be easy. I am learning and experimenting as a hobby, I do not have access to super accurate...

Evening all, I am in the middle of trying to understand the physics behind how gear ratios work on a bicycle. I have a typical road bike with a rear 10 speed sprocket and 2 front chain rings. What i am trying to understand is when you switch to a larger cog in the back it becomes easier to...

Somebody tell me how to calculate gear torque for gears and also for engineering gearbox like worm reduction gearbox and helical gearbox. Any software or hand book is available to find out gear torque and gearbox torque ? Please help me. Thanks Satish Patel

Dear All, Can someone give a specific answer to the question 'What is advantage of using Cast steel over Cast Iron in gear box casings.' Or let me put it like this we have changed our specifcation from CI to CS for Gear Box casing(gear boxes for belt conveyors),now we want revert back due...

I have a gear train system where i have 3 gears meshing with each other (different sizes) gear A, B and C. Gear B is my input/driver and gears A and C are my output/driven. If i know the input RPM and input torque for gear B, what are the gear ratios/the amount of torque transmitted to gear A...

I'm building a simple 20:1 gearbox prototype with 2 compound gears in a row connecting to a third small gear at the end. My goal is to multiply the rotational speed of the small gear. They are all engaged on a straight line. But for some reason they get stuck most of the time. I'm trying to...

hi everyone! i was wondering how gear reduction is done besides connecting a small gear to a larger gear (radius speaking)? In my problem i have a gear - radius:5cm, angular velocity: 1000rpm I have a second gear - radius:5 cm, anguler velocity required: 1 rpm How do i make this...

Homework Statement The problem is that using a human powered bike-like machine we have to climb up a 16 meter long rope. The total weight of the machine + human is 1300N and the theoretical force delivered by the human is 250 Newtons. The crank is 17cm long (that's the length of the arm, the...

I am looking for somewhere to get a gear motor for a very low budget project, specs as follow: Voltage = prefer 110v, could be 12 if the price is right RPM = 15-20 Torque = 100 inlb Quiet as possible Reversible Something else that would be a bonus: Soft start and stop, gradual start...

I have a pinion exposed to 100 oz-in torque and a gear exposed to 300 oz-in of torque (gear ratio of 3). Does the pinion need to have a torque rating above 100 or 300 oz-in?

Hello Everyone. If a planetary gear set has 4 (or more) planets, it is more robust, and is able to handle higher torque loads than a planetary gear set with only 3 (or less) planets. Is there an equation that proves this theory?

Homework Statement Hello fellow Physics Forumers My first post and , hopefully not my last. I've been lurking for a long while and the tempo has increased since I started my 1st year engineering course last semester. So I decided to register today as I have a bit of a puzzle. We have a...

I have a gearbox with a spur and pinion gear which has helical cut teeth. I can get the spur and pinion gears with either a LH or RH helix. I would like to increase the centre distance between the input and output shafts. Can I use a second pinion gear to act as an idler gear between the...

I have an inertia torque source (e.g. a flywheel) which is the input to a simple gear reducer, say with a ratio of 3:1, and the output is coupled to a purely inertial load (e.g. no friction or external torque). Let's say the flywheel has an initial ωfw of 120, so then the output of the gear...

i want the gear so the car is going 100 mph at 6000 rpm 1:1 drive at end of 1/4 mile. have figured out this much for dry run. 32 inch DIAMETER tire x pi 3.14 = circumference. let's call it 100 inches. one mile is 5280 feet. engine will turn at 6000 RPM. RPM is in minutes. MPH is in hours...

while i was typing title i think i just thought of answer. why take out the other gears? other gears would be good for moving car around and maybe try leaving line in 2nd. i'll press on. can i keep top gear ( direct drive 1:1 ) and take out the rest? also keep neutral for safety. Have A...

Homework Statement I wonder if anyone can point me in the right direction as to where to start with this problem. There are 3 gears A sun gear which is in the centre with 45 teeth, pitch 15mm and revolves at 63rpm CW This drives an arm which connects the sun gear to a planet gear, the...

Homework Statement Hi I am doing this gear problem, I have attached the question and how I've started this off I am having problems working it all out as the question said I should try and have the casing rotating at a speed of 15-25 rpm. I have, these gear sizes which were obtained from a...

Hi all, I am new to this forum and hope to get some understanding about the torque capability of gear. Homework Statement 1) Can anyone explain to me about the torque capability? 2) I got some data on torque capability of mod 3.0 spur gear with 50 teeth and 1000rpm, but what i need is to...

Sorry about the less-than articulate title, but I was defeated by the thread-title character limit. The title of this three was to have been: "What's the Advantage of a Sun-and Planet Gear Setup over an Eccentric Rod and Driver Wheel Setup?" The eccentric rod-driver wheel setup seems to...

Hopefully this clip will be available for longer: scUoqzG67-w[/youtube] Original post: About half an hour ago: Edit: clip is no longer visible at Youtube, it can be seen here...

Kudos to the pilot.

Hi, I'm new to this forum but I've read over probably a dozen threads so I figured that someone should probably be able to help me; please forgive me if this is the wrong area to post this question as well. Dilemma: So the problem right now is that I'm trying to use a gear reduction system...

If a 6 speed gear box has a 1st gear ratio of 7:1 and a sixth gear ratio of 1:1 how would you calculate the 2nd,3rd,4th and 5th gear ratio's? If you use the equation for geometric progression which was my first thought - it doesn't work! Any ideas?

Gear Clamp Design--Describe Friction Force I need to know how much frictional force is exerted on both sides of the collet (the piece in the middle of the image) when a force 'p' is applied by the cap nut. (See attachment) This is my first post here. Let me know if I'm being too vague. :)

Good day folks, I hope someone can help me. How do I calculate w(1) without a w(arm)? There is no fixed gear, so no w(gear) = 0 as per normal, which has me baffled. Also - how do I calculate the overall gear ratio? Regards.