An industrial gears manufacturers directory including spur gears, worm gears, bevel gears, plastic gears, gear manufacturer, planetary gears, differential gears, helical gears, small gears, precision gears and metric gears.  

Information Page Links:

Featured Industrial Gear Manufacturers

About Industrial Gears

Industrial Gear Terms

Industrial Gear Associations

Industrial Gear Resources

Trade Shows

Featured Industrial Gear Articles

More Articles

ISO - International Organization
for Standardization

Back

Industrial Gear Terms

Backlash – The distance the width of a tooth space surpasses the thickness of the engaging tooth on the pitch circles.
 
Bore – The diameter of the hole in a gear.
 
Bull – The larger gear of a set of gears.
 
Center Distance (CD) – The smallest distance between the axes of non-intersecting, mating gears.
 
Coupling Sprockets – Used for connecting two non-continuous shaft ends.
 
Dedendum (DED) – The distance, radial or perpendicular, between the bottom of the gullet and the pitch circle.
 
Gullet – The distance between the teeth of a gear.
 
Hob – A cutting tool used for cutting teeth in gears by using a hobbing machine.
 
Hub – An extension projecting from the side of a gear that creates width to a part so it can be mounted on a shaft.
 
Hub Style – The type of style of the hubs on a gear.  Type ‘A’ indicates there is no hub on the part; type ‘B’ indicates there is a hub on only one side of the part; type ‘C’ indicates there is a hub on both sides of the part.
 
Module (MOD) – The pitch diameter’s ratio to the number of teeth expressed in millimeters.
 
Mounting Distance (MD) – The distance from the crossing point of the axes to the location surface of a gear.
 
Pinion – The smaller gear of a set of gears.
 
Pitch – The size of the teeth of a gear.
 
Rack – A steel bar with teeth on one side where a pinion can be driven across. Also a
spur gear with an unlimited pitch diameter.
 
Ratio – The distance from the center of the gear to the point where the teeth or edges come into contact with one other.  It is directly related to the size of one gear compared to the other.
 
Teeth – Edges or outside of gear that have pits and extrusions to interlock with other gear parts. They prevent slippage between the gears and promote consistency and regularity in the gears.