Gears: Difference between revisions

Latest revision as of 17:14, 4 August 2016

Description

Gears (or 'cogs') are wheels whose perimeter is made up of evenly sized and spaced teeth. The teeth of one gear mesh with those of an adjoining one and transmit rotary motion between the two gears.

A gear will always rotate in an opposite direction to the gear it meshes with.

Uses

If both gears have the same number of teeth, they will rotate at the same speed, however if they have different numbers of teeth then the gear with fewer teeth will rotate more quickly - i.e. the Velocity Ratio (or ‘Gear Ratio’) of a pair of meshing gears is given as the Number of Teeth of the Driver Gear divided by the Number of Teeth of the Driven Gear.

The Mechanical Advantage (or ‘Torque Ratio’) similarly is given as No. of Teeth on Driven divided by No. of Teeth on Driver.

DT Online Buyers' Guide

Gears, whether of the same size or different diameters, will only Mesh together if the size of the teeth are the same.

The size of Gear Teeth is measured along the circumference of an imaginery Pitch Circle but is more easily calculated by dividing the diameter of the Pitch Circle by the number of gear teeth.

The Gear Teeth size is known as the Modulus or Module (m) and it must be the same for any meshing gears.

Always check this before purchase - contact supplier if not stated.

Click top left to enlarge


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More on Gears

Pages in category 'Gears'

The following 8 pages are in this category, out of 8 total.

G

I

Idler Gear

M

R

Rack and Pinion

S

Spur Gear

Media in category 'Gears'

The following 9 files are in this category, out of 9 total.

G.gif 152 × 166; 91 KB
G2.gif 248 × 280; 131 KB
G3.gif 248 × 280; 128 KB
G4.gif 248 × 280; 176 KB
GearNomenclature.png 764 × 565; 34 KB
GearsAbstract.jpg 500 × 354; 21 KB
Magnetic cogwheel1.gif 400 × 234; 57 KB
Magnetic gear 26 o.gif 250 × 250; 170 KB
R.gif 248 × 152; 79 KB

@@ Line 1: / Line 1: @@
-[[File:TractionEngineGears.jpg|200px|right]]
+[[File:GearsAbstract.jpg|400px|right]]
+__TOC__
-[https://en.wikipedia.org/wiki/Gear '''Gears'''] (or cogs) are wheels whose perimeter is made up of evenly sized and spaced teeth. The teeth of one gear mesh with those of an adjoining one and transmit rotary motion between the two gears.
-The '''driven''' gear always rotates in an opposite direction to the '''driver''' gear.
+=====Description=====
+[https://en.wikipedia.org/wiki/Gear '''Gears'''] ''(or 'cogs')'' are wheels whose perimeter is made up of evenly sized and spaced teeth. The teeth of one gear mesh with those of an adjoining one and transmit rotary motion between the two gears.
-If both gears have the same number of teeth, they will rotate at the same speed, however if they have different numbers of teeth then the gear with fewer teeth will rotate more quickly - i.e. the '''[[Velocity Ratio]]''' of a pair of meshing gears is given as the ''Number of Teeth of the Driver Gear divided by the Number of Teeth'' of the Driven Gear. The '''[[Mechanical Advantage]]''' similarly is guven as ''No. of Teeth on Driven divided by No. of Teeth on Driver''.
+A gear will always rotate in an opposite direction to the gear it meshes with.
+=====Uses=====
+If both gears have the same number of teeth, they will rotate at the same speed, however if they have different numbers of teeth then the gear with fewer teeth will rotate more quickly - i.e. the '''[[Velocity Ratio]]''' ''(or [https://en.wikipedia.org/wiki/Gear_ratio ‘Gear Ratio’])'' of a pair of meshing gears is given as the ''Number of Teeth of the Driver Gear divided by the Number of Teeth'' of the Driven Gear.
+The '''[[Mechanical Advantage]]''' ''(or [https://en.wikipedia.org/wiki/Torque ‘Torque Ratio’])'' similarly is given as ''No. of Teeth on Driven divided by No. of Teeth on Driver''.
+----
+{{Gears Buyers Guide}}
+=====More on Gears=====
+----
 [[Category:Primary]]
 [[Category:Secondary]]
 [[Category:Mechanisms]]
+[[Category:Materials and Components]]

Category