The perimeter listed in the variant name is the outside circumference in millimeters. To convert to inches, divide by 25.4. For example, D2500 = 2500mm ÷ 25.4 ≈ 98.4". The easiest method is to measure your existing belt's outside circumference with a flexible tape, or check your equipment manual for the belt designation. The D-number in each variant corresponds directly to the outside perimeter in mm.

D Section refers to the classical V-belt profile with a cross-section of 32mm wide × 19mm deep (approximately 1-1/4" × 3/4"). It is the largest of the standard classical sections (A, B, C, D) and is designed for heavy-duty, high-torque industrial drive applications. Your pulley must have a D-section groove to use this belt.

D section belts are generally rated for heavy-duty industrial use and can typically transmit more power per belt than A, B, or C section belts due to their larger cross-section. Actual power transmission capacity depends on pulley diameter, belt speed, arc of contact, and drive configuration. Consult your equipment's drive design specifications or an engineer for exact horsepower ratings for your application.

D section V-belts are typically constructed from rubber compounds that offer reasonable resistance to moisture, dust, and moderate temperature ranges — making them generally suitable for outdoor agricultural equipment and industrial environments. Prolonged exposure to oils, fuels, or extreme heat can reduce belt life. Where possible, shield the belt from direct oil contact and inspect regularly in harsh environments.

Yes. This belt follows the standard D section profile (32×19mm), which is compatible with D-groove pulleys and sheaves conforming to ISO 4183 / RMA/MPTA standards. Always verify that your pulley groove profile matches the D section specification before ordering. Using a D section belt in a B or C section groove — or vice versa — will cause premature wear and belt failure.

The section size is determined by your equipment's pulley groove profile. D section is the largest classical section and is used in heavy industrial machinery, large compressors, agricultural equipment, and industrial fans. If your current belt has a stamped designation starting with "D" (e.g., D105, D120, D128), you need a D section replacement. Check the belt's sidewall markings or your equipment manual for the section letter.

The D-number in our variant names (e.g., D2500) is the outside circumference in millimeters. The effective (pitch) length — used in some belt designation systems — is typically shorter by a fixed offset. For D section belts, the pitch length is generally about 79–80mm less than the outside circumference. If you are cross-referencing an inch-based belt code (e.g., D105 = 105" pitch length ≈ 2667mm pitch ≈ 2745–2750mm outside), contact us to confirm the correct variant.

Yes. Multi-belt drives using matched sets of D section belts are common in heavy industrial applications to increase total power transmission. When running belts in parallel, use matched belts from the same production batch where possible to ensure even load sharing and prevent one belt from carrying disproportionate load. Contact us if you need a matched set of multiple pieces.