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Double-sided timing belts feature teeth on both the inside and outside surfaces, enabling a single continuous belt to drive multiple pulleys rotating in opposite directions. The tooth arrangement is categorized into two standard mechanical formats:
DA Type (Symmetrical / Directly Opposed Teeth): In a DA configuration, the teeth on the top and bottom surfaces are directly aligned with each other. This layout is designed for applications where exact angular synchronization between shafts on opposite sides of the belt is critical.
DB Type (Staggered / Alternating Teeth): In a DB configuration, the teeth on the top surface are offset or staggered relative to the teeth on the bottom surface. This alternating arrangement enhances overall belt flexibility, reduces bending stress over small pulley diameters, and minimizes operating noise during high-speed serpentine drives.

To suit varying operational temperatures, chemical exposures, and load demands, YONGHANG supplies dual-toothed belts in two continuous material formulations:

Neoprene Rubber Double-Sided Belts: Formulated with high-grade chloroprene rubber, continuous helically wound fiberglass tensile cords, and protective nylon canvas facing on both tooth sides. Excellent for high-speed flex endurance, heat resistance, and long service life.
Polyurethane (PU) Double-Sided Belts: Made from wear-resistant thermoplastic polyurethane (TPU) reinforced with high-tensile steel, stainless steel, or Kevlar (Aramid) cords. Ideal for cleanroom environments, zero-backlash indexing, and chemical/oil resistance.
Comprehensive Pitch ConfigurationsWe manufacture DA and DB double-sided belts across all major international pitch profiles:
Curvilinear Profiles: D-HTD 3M, D-HTD 5M, D-HTD 8M, D-HTD 14M, D-STD S5M, D-STD S8M.
Metric Profile Series: D-T5, D-T10, D-AT5, D-AT10.
Imperial Pitch Series: D-XL (0.200"), D-L (0.375"), D-H (0.500").