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Questions tagged [gears]

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0
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1answer
32 views

Control Four Robotics Gripper

I have designed 4 parallel jaw gripper with multiple designs ( 1. Rack and Pinion design , 2. Cam and follower design ) and as there could be 16 combinations possible with 4 gripper (ON,Off) and i ...
0
votes
1answer
50 views

The torque I need to lift the device and correct gear ratio for the device to be as fast as possible

The device have to climb a pipe vertically. I have a DC motor with power rating 21.2 w, output speed 13360 rpm and maximum output torque 154.4 gcm. My device is 1 kg and I have wheel with 0.012 m ...
0
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0answers
36 views

Need help picking motor to wind a spool

The application is a motor attached to a spool to wind/unwind window blinds. I would like to operate the motor at $v=0.2\text{ m/s}$, with a max load of 1.5 kg. I need to know the ideal diameter ...
0
votes
1answer
38 views

How can you calculate the torque and speed of a single output gear being driven by two different input gears?

I am building a gearbox that needs to lift around 50lbs very rapidly. I already have a single planetary gearbox that does the job in around 7-10 seconds, but I would like to cut this time down ...
0
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0answers
12 views

What is the tolerance on gear pitch?

I'm trying to make a gear to mesh with a motor shaft that I bought online, but it doesn't give any information about the pitch or diameter. When I measured the diameter and pitch of the motor shaft, ...
0
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0answers
14 views

Planetary Gearset for Power steering

I am trying to create a power steering system for a go-kart project. In order to switch off between remote control and human control, I plan on implementing a power steering system with a planetary ...
0
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1answer
32 views

How to get precision with a small gear?

I want to be able to precisely rotate a item. For this I have positioned the item on top of a very large gear. It is driven by a smaller gear. When the item is in the correct position, I will lock the ...
0
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1answer
43 views

Calculating Minimum Gear Ratio To Lift Weight

I have a 337 watt motor, and want to lift ten pounds. What kind of gear ratio will I need for a gearbox I attach to this in order to lift the ten pounds at a constant speed?
2
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1answer
44 views

How to increase maximum rotational speed limit of a reduction gearbox?

Reduction gearboxes made of machine steel gear have a maximum limit to prevent changing their physical properties (softening). They change their properties as a result of the temperature increase ...
1
vote
1answer
39 views

Understanding the torque of a motor/gearbox combo

Imagine a typical DC motor / planetary gear combos. Is my thinking correct: Say you have a 100 kg mass on a frictionless surface. The gearbox output shaft has a 0.10m arm with which you push the ...
1
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0answers
27 views

What are the some of the best (dis)engagement mechanism for small gears?

I’m planing to build a robot out of gears. I was wondering what kind of (dis) engagement mechanism would be suitable for gears that are about 2.5cm (1 inch) in diameter. PS: preferably, (dis)...
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2answers
58 views

How to fix this gear

This is a gear that transfers force from a motorcycle kickstarter to the transmission. What method should I use to repair the missing teeth.
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2answers
42 views

Reacting Propeller Torque?

A motor is used to drive a shaft that is geared through 1:1 bevel gears to a propeller. The shafts are mounted on bearings in a hard casing that is attached to a 2nd ground. I want to know if the 2nd ...
2
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0answers
48 views

Performance of RC car under different gear ratio, measured data vs hypothesis

Assuming the driveshaft of the rear wheeled drive RC car follows the linear DC motor theory for stall torque and no-load RPM, also voltage supplied is constant and no inductance as well. Note: the ...
1
vote
1answer
38 views

Intuitive understanding of the common normal at the point of contact of 2 gear teeth

Consider 2 oddly shaped surfaces and pick a point on each of the surfaces. At the point considered we can always draw a normal to the surface. Now if the two surfaces are in contact at this same point ...
2
votes
3answers
158 views

Functionally Matching Gears (teeth count) in Planetary Gearbox

I wonder, whether an equation $$R = 2P + S$$ should give a geometrically sound design, where $R$ is the tooth count for the ring; $P$, for the planets; and $S$, for the sun. I have tried to model a ...
0
votes
1answer
36 views

Mini freewheel / overrunning clutch for stepper motor

I am looking for a mini freewheel, one that I could mount on a standard NEMA 17 stepper motor (or similar stepper). I want to use it with a pulley, such that it starts the motion of a wheel, which can ...
1
vote
1answer
53 views

Gear pump has backflow and does not stop forced flow

I have a "Micropump GB-P25.JVS.A" gear pump. I pump in the range between 100 and 500 ml/min up to a column about 10 cm above the pump level. The column is filled from the top and has a bottom outlet. ...
1
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0answers
75 views

How to calculate bearing loads in a two stage helical gear box?

Here P, Q, R, S are the bearings and G1, G2, G3, G4 are four helical gears. The gear forces tangential(Kp), Axial(Ka), Radial(Kn) are known. All the distances are known. The forces acting on bearing ...
-2
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1answer
258 views

What are positive drive gears? [closed]

Gears are called positive gears and belt drives are called negative drives. Explain in detail.
2
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0answers
44 views

Gearbox oil/grease leakage

Recently I encountered a problem of oil leakage from different driving systems SERVO gearboxes. The transmitted mechanical power ranges from 2 to 8 kW, while the motor speed (the gearbox input speed) ...
0
votes
1answer
70 views

Why all watches hands are stacked in that specific order ? Can it be changed?

It's just a matter of curiosity, but I find hard to justify why every single watch keep the hour hand below the minute one; from a user perspective, it seems a poorly design decision for those times ...
3
votes
1answer
99 views

4 Gears in a Circular Pattern - Calculating the Proper Distances for Meshing

I have recently been working on a gearbox for a robot. I have this pattern of 4 gears with each gear connected to its 2 neighbors. It looks like this: You will probably notice something though. ...
0
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1answer
40 views

Establish a controlled rotation on gears

I am a 3d designer trying to build a simple device for my project and I have a problem. As you can see in schema below, point G has weight on it and it needs to be a controlled, vertical rotation. I ...
2
votes
2answers
38 views

Rotating Multiple Solar Panels with One Motor

I am designing a system to have solar panels track the sun, but only with one axis of rotation that will tilt the panels from east to west. I want to connect the panels together so that one motor ...
0
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0answers
72 views

Center distance and tolerance for worm gear pair

I'd like to use the following worm gear pair in my design: Gear Module: 1.5 Pitch Diameter: 30.1mm Profile Shift Coefficient: -.018 Worm Pitch Diameter: 25mm I am trying to calculate the center ...
1
vote
1answer
105 views

The name of this cross-sectional shape

What is the cross-sectional shape in blue called? The shape, used on the shafts, is used for torque transfer, gears or similar. The three arcs are same diameter as the ball bearing ID, so bearings ...
1
vote
1answer
104 views

How can I couple two small parallel shafts offset a short distance from each other?

I have two parallel shafts, 3 millimetres in diameter and offset by 8 millimetres, both anchored in surrounding housing by ball bearings. When one shaft is rotated (via gear), I want the other shaft ...
0
votes
2answers
57 views

Will this work for single output twin engine

I’m wondering if anybody can help me by critiquing my project idea of having a failsafe power train 4x4 for remote touring🙂. Instead of having one big engine, I’m toying with the idea of running two ...
2
votes
3answers
142 views

Is a 1:1 Worm Drive possible?

I am working on a project that requires a wing to be rotated and I need the rotation mechanism to be fail-safe -- if power fails, the wing will stay in place and not move around. My thought was to ...
1
vote
0answers
34 views

Does the module of 2 meshing spur gears have to be the exact same value ?

Does the module of 2 meshing spur gears have to be the exact same value ? What is the allowable difference? So basically my module is off by 0 01 and my coworker made a model and it works. So I'm ...
1
vote
1answer
137 views

Trouble with Base circle and meshing with spur gears

I am a novice who is trying to make some gears. I have followed the formula's but sadly something seems to go wrong and the gear's don't come out right. Below is some dimensions and pictures. Gear 1 ...
1
vote
1answer
52 views

Crafting a mirrored shifting drum for motorcycle gearbox

I would like to reverse the gearing of my Husaberg FS 650e motorcycle so that by pressing the shifting pedal the gearbox changes up instead of down to the first gear. There are many solutions on the ...
4
votes
1answer
111 views

Resist rotation with friction or teeth?

I prototyped this attractive wooden sit/stand laptop stand but ran into a problem keeping the legs tight enough to hold their position. There are 1/16" thick EPDM washers between the oak legs - the ...
0
votes
1answer
26 views

What is “error in action” in gears?

What is error in action? And why is it called error "in action".
0
votes
1answer
307 views

Worm gear for a lifting device

I am designing a lifting device for practical use which is powered by a dc motor with worm gear. The lifting device should be able to hold the load in place at a certain height.however, i read that ...
0
votes
0answers
230 views

3 stage split planetary gearbox ratio

I am building a high-precision stepper motor with a reduction gearbox at its front. For the gearbox, I intend to use a three stages split planetary gearbox in order to reach a transmission ratio of ...
0
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0answers
112 views

Derivation of motor shaft conversion load inertia

I'm looking for a derivation of this formula. If anyone could show me how to do it I'd be very appreciative.
0
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0answers
66 views

How to connect shaft to gearbox?

I downloaded a 3D model of a planetary gearbox from Rossi website, so the 3D model is reliable. As you can see, there is no keyway on the opening of the gearbox, thus i can't connect my shaft with ...
0
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2answers
463 views

What is meant by “shock load” in gears?

What is meant by shock load in gears? What are steady, light, medium and heavy shock loads?
0
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1answer
22 views

How to find required size of AC gear motor for planetary mixing application? [closed]

I want to find a suitable AC or DC gear motor for concrete paste mixing. The application details are given below Material type - concrete paste RPM - 30-200rpm Qty of material - 30Liters Mixing style ...
2
votes
3answers
116 views

~121:1 speed reduction; are more gears better?

Taking a 1750RPM 110VAC appliance motor down to about 60RPM, maybe a little less. It's a home project on the cheap, so dropping a few hundred dollars on a ready-made gear box is to be avoided, and I'm ...
3
votes
3answers
83 views

reducing rotational speed from gearmotor to below 1rpm

I need to produce a very slow rotational speed for a disk -- 0.25rpm, or 1 rotation in every 4 minutes. The disk is nominally 12" in diameter. It will be driven by a DC gearmotor, through a worm and ...
5
votes
2answers
402 views

How to mount timing pulleys/belts for small DIY project

I'm building a rotating lamp for a small DIY project to learn about motors and timing belts/pulleys. As I am learning, finding parts that are small enough, fit a stepper motor shaft and reasonable ...
0
votes
1answer
39 views

Calculating the angles for gear cutters

I need to design some custom involute gears for a project that I am working on and this is my first dive into gears. I worked out how to calculate the size of gears by the required numbers of teeth ...
2
votes
1answer
35 views

Gear cutting books in metric system

I am learning about gears, hobs and things of this sort. The main book is the machinist handbook which does a pretty good job of explaining things but things are in imperial scale. This causes me a ...
0
votes
1answer
18 views

Does angular velocity of a body rotating on top of another rotating body add up or multiply?

I want to mount a small engine on a shaft of a large engine and rotate them both in the same direction, will the RPMs be a sum of the their RPMs or will the resulting number be a multiplication?
3
votes
1answer
60 views

Gear acceleration and maintaining torque

If trying to achieve a 1:4 gear ratio, will a planetary gear system help reduce the loss of torque? Or is it essentially no different than the loss of torque when using a large drive gear to rotate a ...
1
vote
3answers
857 views

Meaning of O-slash in data sheet about gear diameter?

I have this data sheet for a stepper motor: The pitch diameter of the pinion attached to it is listed as "Ø6". What unit is this? Looking at the wikipedia page for Ø it seems like this is just a ...
2
votes
2answers
76 views

Why do we use bevel gears?

I understand bevel gears are used in situations were a 90 degree change is required, but I can't visually understand why. Why can't we just use standard spur gears at 90 degrees, what do we actually ...