Cylindrical Gears

THC brand cylindrical gears include European / American standard spur gears / pinion shafts / internal gears / external ring gears / helical gears / double helical gears / crossed helical gears for industrial and special applications. Products are available in steel, hardened steel, alloy steel, cast iron, stainless steel, aluminum, bronze, brass, powder metal, plastic, delrin or nylon. Besides stock cylindrical gears, THC also offers custom made cylindrical gears as per specifications, drawing or sample.

Metric Gears

Spur Gears
1. Steel Hubless Spur Gears: M1-5
2. Steel Spur Gears: M1-10
3. Steel Hardened and Ground Teeth Spur Gears: M1-4
4. Cast Iron Spur Gears: M1.5-8
5. Stainless Steel Spur Gears: M1-4
6. Aluminum Spur Gears: M0.2-0.6
7. Brass Spur Gears: M0.5-0.8
8. Powdered Metal Spur Gears: M0.5-0.8
9. Plastic Spur Gears: M1-3
Pinion Shafts
1. Steel Pinion Shafts: M0.25-4
2. Steel Hardened and Ground Teeth Pinion Shafts: M1.5-3
3. Stainless Steel Pinion Shafts: M0.25-2
4. Aluminum Pinion Shafts: M0.4-2
5. Brass Pinion Shafts: M0.4-2
6. Delrin Pinion Shafts: M0.4-2
Internal Gears
1. Steel Internal Gears: M0.4-1.5
2. Delrin Internal Gears: M0.4-1.5
3. Phenolic Resin Internal Gears: M0.4-1.5
External Ring Gears
1. Steel External Ring Gears: M2-3
2. Stainless Steel External Ring Gears: M0.4-1
3. Aluminum External Ring Gears: M0.4-1
4. Brass External Ring Gears: M0.4-1
Helical Gears
1. Steel Helical Gears: M1.5-12
2. Alloy Steel Hardened and Ground Teeth Helical Gears with Keyway: M1.5-10
3. Delrin Helical Gears: M0.5-3
Double-Helical Gears
1. Steel Double-Helical Gears: M1-4
Crossed Helical Gears
1. Steel Crossed Helical Gears: M1-4
2. Stainless Steel Crossed Helical Gears: M1-3
3. Plastic Crossed Helical Gears: M1.5-3

Imperial Gears

Spur Gears
1. Steel Spur Gears: DP3-24
2. Brass Spur Gears: DP16-48
Pinion Shafts
1. Steel Pinion Shafts: DP6-20
Internal Gears
1. Steel Internal Gears: DP16-48
Crossed Helical Gears
1. Steel Hardened and Ground Teeth Hubless Crossed Helical Gears with Keyway: DP6-24
2. Steel Hardened and Ground Teeth Crossed Helical Gears with Keyway: DP6-16

Classification of Gears

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

Definitions by the shaft arrangement: gear pair with parallel axes, gear pair with intersecting axes, gear pair with non-intersecting axes.
Definitions by gear outlines: cylindrical gears, bevel gears, worm and worm gears, racks, non-circular gears, lantern gears, harmonic gears;
Definitions by material: steel gears, hardened steel gears, alloy steel gears, cast iron gears, stainless steel gears, aluminum gears, bronze gears, brass gears, powder metal gears, plastic gears, POM gears, nylon gears, delrin gears, acetal gears;
Definitions by tooth traces: straight tooth gears, helical tooth gears, double helical tooth gears, curved tooth gears;
Definitions by profile forms: involute gears, cycloid gears, circular-arc gears, double circular-arc gears, pin-tooth profile gears, straight tooth profile gears, spherical involute profile gears, octoid tooth profile gears;
Definitions by processing methods of tooth: cutting gears, rolling gears, milling gears, grinding gears, casting gear, sintered gears, forged gears, injection molding gears;
Definitions by hardness of tooth flank: hardened teeth gears, soft teeth gears;
Definitions by peripheral velocity: low velocity gears(less than 3 m/s), medium velocity gears(equals 3 to 15 m/s), high velocity gears(above 15 m/s);
Definitions by gear tooth system: module gears, diametral pitch gears, circular pitch gears, metric gears, imperial gears;
Definitions by sizes of module: coarse pitch gears, medium pitch gears, fine pitch gears;