GATES

PowerGrip GT3 and GT4 are both synchronous timing belts with a modified curvilinear tooth profile. GT3 belts are available in pitches of 2 mm, 3 mm, 5 mm, 8 mm, and 14 mm, with top widths from 6 mm to 115 mm. GT4 belts offer higher power ratings and are available in 8 mm and 14 mm pitches. GT4 belts are often used in high-torque applications where space is limited. Both series are constructed with a rubber compound and tensile cords for dimensional stability. Selection depends on the required power, speed, and pulley dimensions.

Gates 4L section V-belts have a top width of 1/2 inch and a thickness of 5/16 inch. They are available in outside lengths from 10 inches to 100 inches or more. The belts are made of polyester or aramid tensile cords with a rubber body. They are used in light-duty power transmission applications, such as HVAC equipment, appliances, and small industrial machinery. The 4L section corresponds to the classical A section but with different length designations. These belts are identified by an industry number, such as 4L328, where the number indicates the outside length in inches.

Gates Polychain GT Carbon timing belts are available in pitches of 5 mm, 8 mm, 14 mm, and 20 mm. The belts feature a curvilinear tooth profile and are constructed with carbon tensile cords, which provide high strength and resistance to elongation. They are used in high-load synchronous drives, such as those found in industrial machinery, conveyors, and packaging equipment. The carbon cord also allows for operation at higher temperatures than standard belts. Top widths range from 9 mm to 115 mm, depending on the pitch and number of teeth.

Yes, Gates offers dual-sided timing belts in the PowerGrip GT2 Twin Power series. These belts have teeth on both sides, allowing for synchronous engagement on multiple pulleys. They are available in pitches of 8 mm and 14 mm, with top widths from 21 mm to 85 mm. Dual-sided belts are used in applications where reversing rotation or multiple driven pulleys are required, such as in printing presses, textile machinery, and agricultural equipment. The belts are identified by a part number that includes the pitch and width.

Gates timing belts are typically constructed with a rubber compound, such as neoprene or hydrogenated nitrile butadiene rubber (HNBR), and tensile cords made of fiberglass, polyester, or carbon. The tooth facing may include a nylon fabric to reduce friction and wear. The backing is often rubber or a fabric-reinforced rubber. These materials provide resistance to oil, heat, and ozone. The specific construction varies by series; for example, Polychain GT Carbon belts use carbon cords for high strength, while PowerGrip GT3 belts use fiberglass cords for general industrial use.

To identify the correct Gates timing belt, you need the pitch (distance between teeth), the top width, the number of teeth, and the belt series. The part number typically encodes these details. For example, 8MGT-544-21 indicates an 8 mm pitch, 544 mm pitch length, and 21 mm top width. The series (e.g., PowerGrip GT3, Polychain GT Carbon) determines the tooth profile and construction. You also need to consider the pulley type and the required power and speed. 3G Electric can provide cross-reference data and technical support to match the belt to your drive system.