V-belt XPA 907 - 13x10 MM - PIX X'tra ®

V-belt XPA 907 - 13x10 MM - PIX X'tra ® – PIX X'tra® narrow V-belt for stable power transmission

V-belt XPA 907 - 13x10 MM - PIX X'tra ® is developed for V-shaped belt drives, where the sides of the belt work against the pulley grooves. The timing PIX X'tra® construction makes the belt flexible around the pulley, and the data given can be compared to a belt's technical specification: profile XPA, goal 13x10MM, Ld 907mm, Li 862mm and La 925mm.

XPA is a medium profile in the XP series and is a relevant belt type when the pulleys are intended for a timing narrow V-belt with the dimensions 13x10 MM. The belt is particularly relevant for medium-sized industrial belt drives, fans, pu , compressors and other machines where more bearing surface is desired than XPZ. ​​The correct cross-section is essential for the sides of the belt to grip the pulley properly and to be able to transfer the torque without unnecessary slip.

Product data

• Profile: XPA
• Goal: 13x10MM
• Effective length: Ld 907 mm
• Inner length: L 862 mm
• External length: Width 925 mm
• Series: PIX X'tra® Molded Raw Edge Cogged Belts
• Construction: raw edge and Cogged V-belts
• Profile angle according to PIX data sheet: 36° ± 1°
• Mark: PIX

Length specifications

The Ld dimension is the effective length and the length specification typically used for narrow V-belts. Li describes the inner length, while La describes the outer length. The three dimensions must be understood together with the profile, cross-section and pulley grooves, because the length designation alone does not describe the full geometry of the belt.

The three length specifications describe the belt's geometry from each measurement position. L 862 mm describes the inner length, Ld 907 mm is the effective length, and Width 925 mm is the outer length. The difference between them is due to the geometry of the belt and the measurement method. Therefore, belts with almost the same outer dimensions can still have different technical specifications.

With Ld 907 mm, the belt is in a common working range for many machines. Here, it is typically not only the length, but also the condition of the pulleys, center distance and correct tension that determine whether the belt drive runs stably over time.

Construction and technical features of PIX X'tra®

The raw edge construction means that the sides of the belt are designed for direct contact with the pulley. The serrated underside makes the belt more compliant around pulleys, especially where the diameter is limited. PIX also specifies polyester cord as a tensile member, which is relevant for longitudinal stability and load capacity in a correctly dimensioned belt drive.

PIX states for the X'tra® series a power transmission capacity of 15–20% over wrapped belts in comparable operating conditions. The data sheet also highlights better flexibility, approximately 20% higher heat dissipation than wrapped belts, possibility of smaller pulleys in compact drives, maximum linear belt speed up to 42 m/s, antistatic design, oil and heat resistance, REACH/RoHS compliance and temperature range from -45°C to +120°C.

For the XPA profile, the PIX data sheet states the length range 550–5000 mm. This belt with Ld 907 mm is in the range 550–3000 mm, where the data sheet states a length tolerance of ±6 mm and a set tolerance of 2 mm. The tolerances are relevant when replacing, especially if several belts are to run in parallel or if the center distance can only be adjusted to a limited extent.

Use for the XPA profile

The operating situation has a great impact on the belt's lifespan: is the belt running constantly, are there many starts/stops, is the load even, and are the pulleys clean and in good condition? This XPA belt is designed for mechanical power transmission, but lifespan and operation still depend on alignment, tension, temperature, pulley quality, and whether the belt is installed without damage.

This XPA belt is relevant in moderate load applications where the belt must provide stable power transmission without taking up as much space as an XPB or XPC profile. In operation, the pulley groove, the belt cross-section and the timing construction are important for the contact between the belt and pulley. Profile and length must match, as correct length does not compensate for incorrect cross-section.

Profile and pulley compatibility

XPA belongs to the same narrow profile family as SPA, but the belt has its own technical specification with a timing, raw-edge construction. The belt works with side contact in the pulley groove, and the correct groove profile is necessary for the contact surface, friction and load to be distributed correctly. Incorrect cross-section or skewed pulleys can cause overheating, noise, slippage and uneven wear.

The technical identification consists of the combination XPA, 13x10MM, Ld 907 mm, L 862 mm, Width 925 mm and PIX X'tra®The combination distinguishes the item from nearby V-belts with other profiles, other length standards or a different construction.

Installation and operation

When installing, the belt should be placed without being twisted or forced over the pulley with a screwdriver or other sharp tool. Instead, adjust the center distance or loosen the relevant tensioning device so that the belt can be installed without damage. After installation, the belt should have the tension that the machine is designed for, because both too loose and too tight a belt can cause problems.

A new belt should be installed in clean, dry and undamaged pulleys. Oil, old belt dust, rust or sharp edges can shorten the life. Alignment between the pulleys is also important. Even a good belt can quickly wear out if the pulleys are misaligned or if the belt is forced to work sideways.

Avoid using belt spray as a permanent solution to slippage. Slippage is often caused by incorrect tension, worn pulleys, oil contamination or incorrect belt specification. A correctly specified XPA belt of the correct length and in a clean, aligned belt drive is a more durable solution than temporary aids.

The XPA profile with the dimensions 13x10 MM is part of the narrow Cogged V-belts, where the fit of the side surfaces in the pulley groove is crucial for the power transmission. Ld 907 mm describes the effective length, while Li 862 mm and La 925 mm describe the inner and outer measurement line of the belt. Together, the dimensions give a more precise picture of the belt geometry than the length alone. The technical structure is therefore relevant in both new and established belt drives.

Li 862 mm, Ld 907 mm and La 925 mm describe three different measurement lines on the same belt. The difference between the measurements is due to the thickness and geometry of the belt, and therefore they should be seen as technical specifications rather than interchangeable length indications.

Technical questions about XPA V-belts

What does XPA 907 mean on this belt?

XPA is the profile designation and 907 refers to the effective length Ld in millimeters. For this item, this means that the belt is specified as an XPA profile with dimensions 13x10 MM, Li 862 mm, Ld 907 mm and La 925 mm.

Why does a new V-belt get hot?

Heat is often caused by incorrect tension, misaligned pulleys, worn grooves, excessive load or incorrect profile. A correctly specified belt can still have a short life if the belt drive is not adjusted correctly.

Is external length the same as effective length?

No. La is the external length, while Ld is the effective length. They must not be mixed up because the difference may be enough to prevent the belt from being tensioned correctly.

What conditions affect the operation of the belt?

Profile, dimensions, Ld, Li, La, pulley groove, number of belts in the drive and machine operation all affect the load on the belt. When these conditions match, the belt works more stably and has a longer service life.

What do Ld, Li and La mean on this V-belt?

Ld is the effective length and is the length stated in the product name. Li is the inside length, and La is the outside length. The three measurements are used to compare belts because manufacturers and older belt markings do not always use the same length designation.

Is the length alone enough to describe the belt?

No. The length is important, but the profile is at least as important. A belt with the correct length but the wrong profile can lie incorrectly in the pulley, causing poor contact, heat, noise and a shorter life.

When making technical comparisons, length, profile, cross-section and the product's Li, Ld and La should be viewed together. This makes the difference between internal, effective and external length clear and reduces the risk of confusion between adjacent belt sizes.

Short conclusion: V-belt XPA 907 - 13x10 MM - PIX X'tra ® is an XPA V-belt from PIX X'tra® with dimensions 13x10 MM, Ld 907 mm, Li 862 mm and La 925 mm. It is a relevant belt type when the belt drive requires this particular profile and a rough-edged, timing construction with the technical properties that PIX specifies for the X'tra® series.