Worms and Worm Gears

THC brand worms and worm gears include European / American standard single-star / double-star / multi-start worms and their mating worm gears. Worms and worm gears can be machined with ZA, ZN, ZI, ZK and ZC types. Products are available in steel, hardened steel, alloy steel, cast iron, stainless steel, aluminum, bronze, brass, plastic, POM, delrin, acetal or nylon. Besides stock worms and worm gears, THC also offers custom made worms and worm gears as per specifications, drawing or sample. THC can provide services from design to manufacturing to satisfy the customer's requirement of good products with high precision, low noise and long life time.

Module: 0.5-20mm,
Max. diameter of worms: 280mm
Max. lead angle: ±35˚
Max. grinding slide stroke: 570mm
Max. diameter of worm gears: 890mm
Max.helical angle: ±45˚
Precision grade: DIN 3 or AGMA 11
Surface roughness:Ra 0.4(Max. Ra 0.1)

Metric Worm and Worm gears

Steel Worms: M0.4-4
Bronze Worm Gears: M0.4-4
Steel Hardened and Ground Teeth Worms: M1-6
Bronze Alloy Worm Gears: M1-6
Stainless Steel Worms: M0.4-0.5
Brass Worm Gears: M0.4-0.5
Delrin Worms: M0.4-4
Delrin Worm Gears: M0.4-4
Stainless Steel Worms: M1-3
Nylon Worm Gears: M1-3
Alloy Steel Hardened and Ground Teeth Dual Lead Worms: M2-4
Bronze Alloy Dual Lead Worm Gears: M2-4

Imperial Worms and Worm Gears

Steel Worms: DP3-16
Steel Hardened Teeth Worms: DP6-16
Steel Hardened and Ground Teeth Worms: DP3-16
Cast Iron Worm Gears: DP3-16
Bronze Worm Gears: DP3-16

Special Application Worms and Worm gears

Classification of Worms and Worm Gears

Based upon different factors, worms and worm gears can be classified as follows:

Definitions by the outlines: cylindrical worms and mating worm gears, enveloping worms and mating worm gears, spiroid pinion and spiroid worm gears;
Definitions by material: steel worms, hardened steel worms, alloy steel worms, stainless steel worms, aluminum worms, brass worms, plastic worms, POM worms, nylon worms; steel worm gears, alloy steel worm gears, cast iron worm gears, stainless steel worm gears, aluminum worm gears, bronze worm gears, brass worm gears, plastic worm gears, POM worm gears, nylon worm gears;
Definitions by number of starts: single-star worms, double-star worms, multi-start worms and their mating worm gears;
Definitions by profile forms: straight sided axial worms(ZA-worm), involute helicoid worms(ZI-worm), straight sided normal worms(ZN-worm), milled helicoid worms(ZK-worm), arc-contact worms(ZC-worm) and their mating worm gears；enveloping worm with straight line generatrix(TA-worm), planar double enveloping worms(TP-worm), toroid enveloping worm with cone generatrix(TK-worm), toroid enveloping worm with involute helicoid generatrix(TI-worm)and their mating worm gears;
Definitions by processing methods of tooth: milling worms, grinding worms, injection molding worms; milling worm gears, casting worm gears, forged worm gears;
Definitions by hardness of tooth flank: hardened teeth worms, soft teeth worms;
Definitions by gear tooth system: module worms and worm gears, diametral pitch worms and worm gears, metric worms and worm gears, imperial worms and worm gears;
Definitions by sizes of module: coarse pitch worms and worm gears, medium pitch worms and worm gears, fine pitch worms and worm gears;