Custom Internal Gear

Jack Lie CNC machining expert

Specialize in CNC milling , CNC turning, 3D printing, urethane casting, rapid tooling, injection molding, metal casting,


The internal gear, also referred to as a ring gear, is a gear with its teeth cut into the inside diameter and mesh with spur gears. Internal gears are widely used in equipment and applications, especially in light duty applications, because of their large speed reductions and reduced sliding wear action. When it comes to having two parallel shafts rotate in the same direction, internal gears can meet that demand without need for an idle gear.

Application: Rollers, electric screwdrivers, pumps, positioning equipment, automotives, bicycle components

Available material: steel, stainless steel, heat treated steel, sintered steel, tool steel, ductile iron, gray iron, brass, bronze, copper, cast iron, aluminium, plastic & phenolic.

Let Runsom supply you with available solutions to your gear projects! We welcome the challenge!