Gear Definition and 402 Threads

1. This is a question that I've asked a few people and have not been able to get a solid explanation to: The crankshaft gear (A) has 14 teeth. It drives gear (B) with 21 teeth which is on a shaft & on the other end of the shaft is gear (C) with 9 teeth. The distributor is driven off gear (C)...

Hi I have to design a gearbox for a drum, the drum should be brought uniformily to a speed of 7rpm in 8 seconds, I have choosed a motor of 715 rpm output, what's the gear ratio I should use in designing the gearbox? Thanks

Sorry if the title is a bit blunt, but it's basically like this. There's this machine I'm working with. It's kinda using Gear + Chain to drive the output. Initially, they were all driven by gears but the gear is spoil every 2 months. So then it was changed to chain instead but now the...

A Quantas airplane flying between Sydney and Melbourne yesterday had to turn around and return because a "faulty landing gear" light came on. Why turn around? You got to land either way.

Hello, I was wondering what kind of reliability tests I could do with landing gears. The one we are working with, is a conventional, trail dragger. Right now, we are building a model and later on the full size. But we are focusing on reliability and I'd like to know good methods so that I...

When searching through a catalog for gear drive reducers, I find that many of them list nominal output torque and nominal input speed. My question is what does the term 'nominal' in that context mean. If it lists nominal output torque of 3186in.lb, and nominal input speed of 2900rpm, does...

So you are offered a certain product that is much cheaper than in the shops, the tax sort of wasnt paid at customs, would you buy any?

The jolt that you feel when you press on the gas when in 1st gear...would you feel that same jolt in 5th gear if there was no air resistance?

Hi all, I am confused of how to find the “TOTAL TOOTH-TO-TOOTH SPACING AND PROFILE ERRORS e”. My Professor want me to determine the ERRORS of a Spur Gear with gear diameter d1 = 420 mm and pinion diameter d2 = 65 mm and a gear module m = 8 and the AGMA Quality is No. 10. When I see the...

Design the shaft assembly of gear 2 with the following information: Gear: The specification of the involute helical gears are as follows Pressure angle: 20 degrees Torque acting on gear 1, T1= 95500Nmm Number of teeth: N1= 55(gear1), N2=135(gear 2) Helix angle= 15 degrees Tooth Width b=...

Hi I am doing a physics coursework presentation, and i need to calculate the stress in the landing gear of an aircraft. It can be any aircraft I just need some figures, for instance the force on the landing gear as it lands, and the cross-sectional area of the landing gear. The formula for...

I am working on a mechanical model for a Snowmobile and trying to figure out what the differential equations becomes when you have a CVT (Continuous Variable Transmission) instead of a Gear Box. Assume that you have two shafts connected with each another through a (lossless) and stiff gear box...

Homework Statement Hai Friends, i want to know the complete the dimension of bevel gear front teeth width and end teeth width. How this dimension are related with emperical formulas please give me complete detailing of bevel gear far straight and spiral also...

Suppose that it was possible to construct gears smaller than ones of modern ten speed bicycles(nano gears) and suppose your chain or belt could turn them and withstand the friction. First gear of course would be the same as a modern ten speed in order to get it moving. If the last gear's radius...

Can someone please brief me what is Gleason and Revacycle profiles and what are the major differences between? Please help me to find some gear profiles, I've some data with me which is actually not matching empirically with Gleason as well as Revacycle profiles. I'm involved into bevel...

I've a gearbox from a 250 cc Honda engine. The pattern in one down and four up. This engine will be integrated into a car, so the changing of gears will be difficult with the foot pedal. wouldn't it ? :) . So i decided to integrate a small motor to the gear shift pedal so that it can change...

I am building a robot for a design class. Part of the design includes a wheel base to drive the robot forward. To accomplish this I was going to attach a spur gear system to a wheel axel and drive the input gear with an electric motor. The gears themselves will be made out of acrylic and cut...

if the diametral pitch of the pinion is x, would the diametral pitch of the gear also be x?

I need to know which gear has a better power transmission efficiency/ 1. Worm gear or the Spur gear and why as well there's a design for a device that must take power from a high speed but low torque source and deliver it to a low speed, high torque shaft. the speed reduction can't be done...

If i am not wrong, there is shimming damper at aircraft nose gear. Anybody have any idea about what's the device for?

I have a 8-1/2 inch drive pulley turning at 340 rpm. I want to have it drive a pulley and want that pulley, the driven pulley, to turn at 200 rpm. What is the formula to figure out what size pulley I need. Please help:smile: :smile:

How to design a spur gear? which material is good? What are the factors to be consider to design good spur gear?

The pinion gear is run by motor and is made of "FD-0205-50 per MPIF 35" material. what could be the reason for pinion breakage. How to overcome that problem and what are the parameters you need to consider. Is it possible for investment casting gear. what could be the possible tolerance...

I am building a small satellite for my project in which I have to release a mechanism to eject the landing gear at a certain altitude before landing vertically. The landing gear will consist of spring-loaded rods, initially at 90 degree angle with respect to the circular base of diameter 2 inch...

The rear wheel of a bicycle has a set of sprockets whcih vary in size. The chain hooks onto the sprockets, and when a pulling force is apply to the chain, the sprocket, hence the wheel turns. As any cyclist knows, when going up a hill, to maintain a constant velocity, it is better to use a lower...

Can anyone tell me the forces i may expect to find with this intermitent mutilated gear drive system, it will be driving an almost free wheeling component at i hope up to 6000 rpm the weight of the driven compnent will be ozs, about 2 inches dia by 6 inches long...

hi everyone, suppose i have a system of gears where one shaft contains the initial pinion. a drive torque is applied to the pinion shaft so that the pinion then applies a force to the gear its connected to. how would i calculate the forces on the gear shaft? it is a static system (contant...

I drive an auto. On the transmission gear selector, there is P R N D4 D3 2 1 My friend showed me that you can downshift from D4 to D3, and you can feel the car slow down from the downshift. So now I find myself playing around with it all the time. Do you think this is bad for the...

Does anyone know if it is possible to get a worm gear mechanism to work using a spur gear. I am just trying to make a small model of a worm gear out of acetal plastic for demonstration purposes only. I am thinking it might work as long as the pitch on the lead screw, is the same or a little...

Hi all. How do one design the gear tolerance and the surface roughness of a gear? I know there are some quality numbers in AGMA, but is quotaing the number is enough for specifying the tolerances of a gear? about the surface roughnessm i saw many things like remove mostly 3.2mm etc...How...

the question given is this " Gears can be made of forging especially bevel gears. Through literature survey describe the sequence of manufacturing steps involved in the production of gears." what i thought is that the gear should be manufactured by extrusion, and then cut it into pieces...

How do you calculate the mechanical advantage of a 3 gear train system. The formula I have for gears is only for 2 gears: MA = number of teeth in the driving gear/number of teeth in the other gear.

My son races small cars that are direct drive. An engine, engine gear, chain, and axel gear. Since there is no shifting finding the right gear ratio is critcial to the speed of the car. By examining the dyno reports on the engine and through trial and error you can determine the best gear...

Maybe someone on these forums is associated with the electronic motor industry. My company is looking for a custom 24V dc gear motor assembly to actuate hydraulic ball valves. It would be a component we would offer with our product line. None of us have enough experience these types of devices...

Hi , is anyone studying gear ratios?? i need some help with calculating the final gear drive.. i've calculated it at 94.97:1 is this correct??

Boy, did you see it? I was sure it would just snap.

Hi all! I would like to know how, in workshop practice, one would measure the tooth thickness and pitch of a spur gear?

Hi all! I have a problem about the gears used in a winder as hown in the picture. You can see right in the front view of the picture, there is a counter, which is a pair of worm gear. The engineering drawing of this pair of draw is as shown in another picture. My question is, in the...

I have a scooter with a 5 inch diameter wheel and I want to make it go 25mph with a motor that has this specs. ==== Power 0.35 hp @12v 1.43 hp @24v Torque 0.47 lbf*ft @12v 0.97 lbf*ft @24v Efficiency 70% @12v 76% @24v Speed 1260 RPM / Volt Voltage 12 volts or 24 volts* Weight 11...

http://www.timebomb2000.com/vb/showthread.php?t=158958

What is a gear and what does it do?

Hi, I am looking for some help designing a gear for an invention of mine. I know gear design basics, but this is a little beyond what I know. Any help would be greatly appreciated. The needed gear (to be made from plastic) is part of a toy and will be under very little stress. For my...

Ok here's a fairly simple question (I hope) i know that with different gear ratios you can trade off torque for speed, (ie. big to small = lower torque higher speed, small to big = higher torque lower speed) but what happens to the force applied to the original gear? is it a constant throughout...

Hi, I am doing a project that involves an electric motor that winches an object upward pulling it by a string, over a given distance and I need help to calculate an optimal gear ratio, if that is possible. This is how far I have got... Variables torque/rpm gear ratio Constants distance...

How do you calculate Gear Train Radios? Thanks

Hi, Would more Gearings aligned in a series on a rack mean more Torque? And also,... what gearing should I use on motor: ones that is a lot bigger than the ones on the series, or ones that are a lot smaller? which ones would generate more torque(power) rather than speed? Would the rack's...

Why did the Apollo LEMs have a four leg landing gear instead of a three leg landing gear? I saw some old photos of LEM concepts using a three gear setup and it got me wondering why they went to a heavier 4 gear setup. Thanks, Glenn

I am a kinetic sculptor in need of some gear reduction help. I have a 2250 rpm .5 hp electric motor. i need to reduce the rpms to less than 5. the gear drive will turn a 30" plywood wheel, and it must turn slowly. the electric motor is the only one I have, so i must use it. I have a small...

[http://www.newsday.com/business/ny-bzsell0319,0,4764348.story?coll=ny-business-headlines] Turns out some clothing labeled "Bush/Cheney '04" that is being sold by the Bush Campaign has been made in Burma (Myanmar). Presumably they get larger profit margins from the Burmese cloths, since...

Hi Ive been trying to solve the following problem: There are two gear wheels whose centers are separated by 25 cm. a chain is wrapped around the two wheels such that if one wheel is turned the other turns(much like a cycle chain.) If th radius of the wheels are 11cm & 4 cm respectively, find...