Gears Definition and 174 Threads

Hello, I was wondering if anybody could recommend a simple method to pick gears for a given task. I need to make a rough estimation to see if I'm off by more or less a factor of ten. The only method I have access to is very complex and hard to understand. Cheers

Hi, that's my first post here.First of all – I do not want to ask someone to calculate something for me. I did my best (I hope correctly) – can you briefly check it and answer my additional questions? I am especially interested in these questions – I always have some doubts during calculations...

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...

Hi, this is a question from a previous past paper that I am having trouble with. Am I meant to just use the number of teeth from each gear to find a ratio and use this to find the effective inertia at point C. Then use this to find a torque and take away the torque of the constant load. My exam...

Hi can anyone help me with this question on inertial forces in gears? Cheers Ali :)

I am working on a school project where a motor needs to turn a drum. The motor is mounted to one side of the drum. The motor is much smaller than the one in the picture, and won't be able to attach directly to the axle. Currently, I am thinking that I attach a pinion to the end of the motor...

hello i have two spur gears. i would like to know the backlash that i would be getting. How can i calculate backlash?

Homework Statement A small gear with mass m and radius r rotate around a central axis. A force is applied to an interior hub at a radial distance r/2 from the axis. A. If a force of 4N is applied for 10s, what is the angular velocity of the small gear, assuming it starts at rest? B. Once it...

I am interested in the design of real gears. I know much of the theory as covered in "physics 101." Here is an example of the things I want to learn to compute: Given a gear made of some specific material and a given face width with say Module 1.0 tooth size how much tangential force can...

Homework Statement Homework Equations tangential velocity v = ωr angular velocity ω = 2πf The Attempt at a Solution Not really looking for help to solve the problem. I'm just confused about the speed/angular velocity and frequency If the frequency of the motor is given as 24 Hz, then...

Recently I have been researching torque and horsepower. I know that the lower the car gear, the more the torque. However, whenever I see specifications of a car, it says : X lb-ft of torque at Y rpm. Now, shouldn't they specify the gear that was measured in? Or is this the torque the engine...

I am driving 2 different gears with a belt off of a stepper motor that has a step angle of 0.018 degrees. For the purpose of my project, I need to have high precision between the stepper motor and the gears that it's driving. Is it necessary to have 20,000 teeth (360/0.018) on the gear that's...

Is it possible to disengage two moving gears then engage a moving gear with a non-moving gear? If so approximately how much energy loss will there be in doing so?

I have a system that consists of a shaft and two selected gears. I want the shaft to be rotating at 250 RPM and to deliver an input power to the system of 850W. The input torque at the shaft is 71Nm. How can i use this information to determine how large my driving and driven gears will be...

This system consists of a shaft that is connected to a motor that is rotating at 200rpm. The whole shaft consists of two gears. The input power of the system is 500W. Is there a way i can calculate how exactly i can find the best material for my gears that is able to withstand the input power...

If I had 2 serrated plates like the ones in the attached picture locked in place like seen below. How would I go about calculating the maximum amount of torque needed for failure of the part. Assuming it has 48 teeth and is made from stainless steel?

Is it possible? Could i cut a round piece of aluminum and stick magnets into it to resemble a spur gear? I am trying to make a 4:1 gear ratio but eliminate friction, i was thinking if i could custom fit magnets in the aluminum wheel (since magnets are not atrracted to aluminum). I would have...

Homework Statement Length of action Z(Length of line of action) is Z=\sqrt{(r_{p}+a_{p})^{2}-(r_{p}cos\phi )^{2}}+\sqrt{(r_{g}+a_{g})^{2}-(r_{g}cos\phi )^{2}}-Ccos\phi How can I drive it? Homework EquationsThe Attempt at a Solution

< Mentor Note -- thread moved to HH from the technical Engineering forums, so no HH Template is shown > Okay so I'm a freshman BE student and one of our first projects is designing a windmill that can produce a voltage of 5 for 2 seconds or longer. We are having trouble find the optimal gear...

Hey, so I have a project for an intro engineering course in which we have to build a mousetrap car that both moves quickly and goes long distances. I've scoured the internet for info and I've come up with a few questions. First off, as I understand the physics of the mousetrap car, the...

If you put magnets in a gear (like in an Internal Permanent Magnet motor), what effect would the gear's teeth have on the magnetic fields?

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >[/color] What are the advantages and disadvantages of bevel gears? This is what I've already found: Advantages: possibility to change operation angle Disadvantages: must be precisely...

Homework Statement Homework EquationsThe Attempt at a Solution 1. A gearbox is required to transmit 5.5 kW from a shaft rotating at 2000 rpm. The desired output speed is approximately 350 rpm. The output must rotate in the same direction as the input and along the same axis. Select suitable...

Lets say one gear is rotating with some angular velocity and its angular momentum vector is pointing up. A second gear (not rotating) is then allowed to mesh with the first. The second gear has the same radius and moment of inertia as the first. Is not the angular momentum vector of the second...

Good morning, I have little problem here and I've come here with hopes of a solution! I'm currently messing with a rotary to linear pressure cycling system. The size of the air cylinder has already been decided and I'm simply trying to design around it. Here are the specifics! I've added a...

All About Epicyclic gearing This Video illustrates : - How does Epicyclic gear Work - some Application of Epicyclic gear - How to make Epicyclic gear calculation

Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How...

Hi ! This is Mustafa. I recently did my bachelor's and started working with Honda Motors. So my manager asked me to do a little research regarding the Gear type (SCM415H) used. I have to check how varying the chemical composition of each element will result in the properties of the gear...

Hi everyone! Just joined the fórum after a lot of hours searching the web and Reading some books...I have one question, didn't found na answer to it...but let's give it a try ;) How can you determine the optimal circular pitch and in consequence the optimal diametral pitch of a gear (increasing...

If the selected gear ratio and final drive ratio multiply the torque and reduce the speed then why does the dyno read less torque? e.g a car with 200 Nm (@5000 RPM) of torque with a 2nd gear selected (Ratio = 2) and final drive ratio 3.5 200*2*3.5 = 1400 Nm of torque 5000/2/3.5 = 714.3 RPM...

Hello, I urgently need to be able to draw a set of bevel gears for 3d printing. The gears I am currently drawing intersect that is their teeth are penetrating each other when the gear turns. Currently using http://www.daycounter.com/Calculators/Bevel-Gear-Calculator.phtml to find the numbers...

Homework Statement http://postimg.org/image/sd66qty27/ I am trying to understand the impedance terms for the equivalent system in (b) Homework Equations T1/T2 = N2/N1 The Attempt at a Solution I just don't understand why the impedance before the gears have to be multiplied by (N2/N1)^2...

hey, I am building a fan, but I need the fan blade to move relatively slow, slow enough to see each panel on the blade. I am expecting to use a gear system with a belt. What gears should I use to active this?

Homework Statement I have an assignment which is asking me to calculate the minimum diameter of a shaft. Shaft length is 300 mm. The shaft is held between two bearings with one on the left hand side and one on the right 220 mm away. At 143 mm there is a spur gear and at 300 mm(at the end) is a...

there is a relation between the no of teeth in ring gear,sun gear and plant gears are there(2R=S+P) Like that any relation between no teeth in plant and sun gears?

Hello, I wonder whether I can replace the Metal gears and other parts with Plastic material? If so, what kind of plastic material should I use? There is no heat and the force is also not that great but the speed is. This is not for toy but industrial machinery, with gear diameter of about 10...

Homework Statement I'm on the very last section of a question for the design of a simple gear train. I've managed to design the gear train with all criteria fulfilled and I am confident that it is correct. I just need clarification that my calculations thus far are correct and also a fresh...

Homework Statement I need to find if there is a torque on the support with 3 gears: http://imageshack.com/a/img901/8954/mFzBas.png The Gear1 is forced to turn at 3w by an external device. Gear2 and Gear3 must follow. Homework Equations None The Attempt at a Solution I drawn all forces...

I am looking for a very specific sort of gears. And I know they don't exist in any stock so I am convinced I need them custom made, googling gears really just gives me sloppy results. I'm not finding any professional-looking websites. They look sketchy or boring at best, definitely off-putting...

Homework Statement A gear train is to be designed to transmit power from shaft 1 to shaft 2 with the following condition: Shaft 1 (driven by an electric motor) rotates at 100 revs min–1. Shaft 2 is to rotate at 400 revs min–1 in the opposite direction to shaft 1 against a load of 200 Nm...

Homework Statement The mechanism that operates the load/unload tray for holding the disk in a tabletop Blu-ray player uses nylon spur gears, a rack, and a belt drive. The gear that meshes with the rack has a module of 2.5 mm. The gears have the numbers of teeth indicated, and the two sheaves...

Hello everyone, my question is: Would be ok to use a self locking gear like a worm gear for a solar tracker system on a 2 ton parabolic mirror dish? Would it be necessary some kind of brake system, or the worm gear would be enough? If so, are there any type of self locking gears besides the...

Hi: I'm building a computer simulation for a 3 gear train system. So far the gears rotate with mouse movement horizontally. Now I'm adding a fictitious motor and braking system to start/stop rotation with mouse clicks. I multiplied the rotation angle by [1-e(-t/TC)] to simulate exponential...

Lets say you have two sets of gears with a combined 200:1 ratio. There's a worm and worm gear + two spur gears that rotate a welding table via a hand crank going to the worm. If the torque load from the weldment on the table was, say, 9375 in-lbs... then to calculate the force needed on...

Hi, I am trying to understand the Overlap Ratio (OR) / axial contact ratio of a helical gear pair. Unlike transverse contact ratio, I am unable to understand OR so easily. What does it mean if the OR is exactly 1? What will happen practically when it goes less than one? Thanks.

This question is about push bikes, but could be applied to anything with a versatile engine and a gearing mechanism. My bike is propelled by pushing on the pedals. Whether I use a high or low gear, the force remains the same. If the force and mass remain constant, how come I can accelerate...

Hi, When I was studying some gear drawings, I found the tip relief given for all the gears. I find the reason that it avoids the contact between tip of driving flank and root side of driven flank. What is the intention of avoiding this condition? What if I don't give a tip relief? Thanks.

Okay, I am no math genius here, so this may sound like a stupid question, but I am curious to know, how do I find how many teeth a gear will need and how big or small it should be to rotate a 34mm dial 28.07 degrees? Cheers

Okay, so I am having a problem, I'm not the greatest at math, here is the problem: I need a set of reduction gears, my plan is to have a gear attached to a shaft (base diameter of this first gear is 33mm) with 50 teeth (maybe?) To turn a reduction gear that will be on another shaft that will...