ConCar narrow V-belt SPA - 1307 Lw

ConCar narrow V-belt SPA – 1,307 mm effective length – DIN 7753 / ISO 4184

With the ConCar SPA narrow V-belt in 1,307 mm effective length, you receive a wrapped high-performance V-belt according to DIN 7753 Part 1 and ISO 4184. Compared to the classic V-belt according to DIN 2215, the narrow V-belt profile is slimmer and has a higher profile: With a comparable overall height, it carries significantly more power because the tensile member is located further out and the flank contact area is larger in relation to the belt width.

This length in the drive

With an effective length of 1,307 mm, this belt falls within the middle length range of the SPA profile, the range with the most favorable ratio of bending to tensile stress. Two identical pulleys with a 224 mm diameter result in a center-to-center distance of approximately 300 mm. Most standard drives are designed within this range because the wrap, tensioning travel, and belt mass are well-matched.

For ordering and comparing with an existing belt, the three length dimensions are important because different manufacturers use different reference dimensions. The effective length (Lw, sometimes Ld) is 1,307 mm. This is the standard dimension for narrow V-belts and is therefore included in the product description. The inner length (Li) is 1,262 mm, and the outer length (La) is 1,325 mm. For the SPA profile, the fixed distances according to DIN 7753 are Li = Lw − 45 mm and La = Lw + 18 mm.

Dimensions and specifications

• Effective length (Lw / Ld): 1,307 mm

• Internal length (Li): 1,262 mm

• External length (La): 1,325 mm

• Profile: SPA according to DIN 7753 Part 1 / ISO 4184

• Top width: 12.7 mm (nominal size 13 mm)

• Height: 10 mm

• Flank angle: 40°

• Construction: sheathed, rubberized fabric casing

• Mixture: Chloroprene (CR)

• Tensioning material: Polyester cord

• Antistatic: yes, according to ISO 1813

• Temperature range: -30 °C to +80 °C

• Belt speed: up to 40 m/s

• Recommended minimum guide diameter: 90 mm

• Suitable pulleys: Narrow V-belt pulleys according to DIN 2211, profile SPA

• Manufacturer: ConCar

Structure and materials

The belt consists of a chloroprene rubber core with a longitudinally inserted polyester cord as a tensile member, surrounded by a rubberized fabric cover. The polyester cord absorbs the tensile forces and ensures minimal elongation, while the fabric cover carries wear on the groove flank and distributes the force evenly into the core. This construction is the reason why a sheathed belt continues to operate reliably even with dirty or slightly tarnished pulleys.

The flank angle of 40 degrees is the same for all narrow V-belts and corresponds to the groove geometry according to DIN 2211. The difference to the classic V-belt according to DIN 2215 lies in the width-to-height ratio: the SPA profile has a top width of 12.7 mm and a height of 10 mm. This positions the tensile member further from the groove base, the flank area is larger relative to the overall height, and the belt transmits noticeably more power within the same installation space.

Typical areas of application

The SPA profile is the best-selling narrow wedge profile overall and covers classic mechanical engineering applications: fans and blowers in ventilation systems, compressors, pumps, conveyor belts, machine tools, shredders and woodworking machines, as well as numerous drives in agricultural and municipal technology. Depending on the speed and pulley diameter, up to approximately 10 kW per belt can be transmitted; correspondingly more in sets.

Assembly and tension

For installation: Reduce the center distance, place the belt without tension, then tighten it to the required tension. Never pull the belt over the pulley edge or pry it open with a screwdriver. Doing so will cause individual cord threads in the tension member to break, which remains invisible from the outside and will cause the belt to fail after only a few hours of operation.

If several belts are running in parallel, always replace the entire set. A new belt next to worn ones will have less stretch and will essentially carry the entire load while the old ones continue to run. This results in the new belt failing after a short time and leading to the suspicion that the quality was substandard. ConCar manufactures belts with precise length tolerances, so belts from the same batch can be used as a set without pre-sorting.

Similar names for other brands

Narrow V-belts are standardized according to DIN 7753 Part 1 and ISO 4184. A belt with profile SPA and an effective length of 1,307 mm is therefore dimensionally identical regardless of the manufacturer and will run in your existing pulleys without modification. This belt replaces, among others:

• OPTIBELT: SK SPA / SUPER X-POWER SPA

• GATES: Super HC SPA / Delta Narrow Wedge SPA

• CONTITECH: CONTI-V ADVANCE SPA

• MEGADYNE: Oleostatic SPA

• MITSUBOSHI: Wedge SPA

• BANDO: Power Ace SPA

• PIX: X'set SPA

Delivery

The belt is supplied as a single, endless belt. Standard lengths are available from stock, and delivery is available throughout the EU. For multi-belt drives, please specify the required quantity, and we will assemble the order from a single batch.