Understanding Imperial Trapezoidal Tooth ProfilesImperial timing belts feature classic trapezoidal tooth geometry defined by standardized pitch distances measured in fractional inches. They provide a cost-effective, zero-slip drive solution across traditional American and international mechanical designs:
MXL Profile (Mini Extra Light): Pitch = 0.080" (2.032mm). Designed for high-precision, low-torque miniature drives, medical equipment, and office automation systems.
XL Profile (Extra Light): Pitch = 0.200" (5.080mm). Ideal for lightweight fractional horsepower drives, 3D printers, labeling machinery, and small conveyors.
L Profile (Light): Pitch = 0.375" (9.525mm). Widely used in general industrial automation, packaging equipment, textile machinery, and motor-driven drives.
H Profile (Heavy): Pitch = 0.500" (12.700mm). Engineered for medium-to-heavy power transmission, machine tools, woodworking lines, and compressors.
XH Profile (Extra Heavy) & XXH Profile (Double Extra Heavy): Pitches = 0.875" (22.225mm) and 1.250" (31.750mm). Heavy-duty industrial profiles built to withstand high torque loads and extreme mechanical stress in mining, oilfield, and heavy industrial machinery.

Depending on operational dynamics and environmental exposures, YONGHANG produces imperial synchronous belts in two high-performance elastomeric materials:
Chloroprene (Neoprene) Rubber Belts: Embedded with continuous helically wound fiberglass tensile cords and covered with a durable nylon tooth canvas. Offers excellent flexibility, high heat resistance, and superior fatigue endurance for closed-loop high-speed drives.
Polyurethane (PU) Belts: Formulated with wear-resistant TPU reinforced with longitudinal steel or Kevlar cords. Excellent for cleanroom environments, chemical/oil resistance, zero backlash, open-ended long rolls, or welded custom-length conveyor drives.
Custom Configurations & ProcessingDouble-Sided Imperial Belts: Available in D-XL, D-L, and D-H configurations with dual tooth surfaces for multi-axis reverse rotation systems.
Precision Slitting Widths: Custom cut to any specific width in inches or millimeters (e.g., 025/0.25", 037/0.375", 050/0.50", 075/0.75", 100/1.00", 150/1.50", 200/2.00", or wider).
Specialized Backing & Cleats: Custom back-coatings (rubber, Linatex, APL) or thermal-welded cleats added to PU XL/L/H belts for precise material handling.