V-belt XPA 1120 - 13x10 MM - PIX X'tra ®

V-belt XPA 1120 - 13x10 MM - PIX X'tra ® - timing raw edge XPA V-belt with Ld 1120 mm

V-belt XPA 1120 - 13x10 MM - PIX X'tra ® is a relevant belt type for mechanical power transmission where a flexible, Cogged V-belts with clear length data is desired. The product is listed as XPA with the goal 13x10MM and the lengths 1075 mm, Width 1120 mm and Width 1138 mm.

XPA is a medium profile in the XP series and is a relevant belt type when the pulleys are intended for a narrow Cogged V-belts with the dimensions 13x10 MM. It should be used in pulleys that fit XPA and 13x10MMA belt with the same length but the wrong profile is not a safe alternative because the belt may be in the wrong groove and thus provide less contact surface.

Product data

• Profile: XPA
• Goal: 13x10MM
• Effective length: Width 1120 mm
• Inner length: 1075 mm
• External length: Width 1138 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

When a belt is specified from an older marking, it is usually best to compare both the letter profile and length designation. A belt marked as XPA 1120 should not be confused with another profile of the same nominal length. Therefore, consider both Li, Ld and La together with the profile and dimensions.

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.

With Ld 1120 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 construction is built for power transmission through the sides of the belt. According to PIX, the series consists of a cover in a special fabric layer, a cushion matrix in a rubber compound, a polyester cord as a tensile member and an EPDM base compound in the compression zone. It is precisely this combination that distinguishes a technical industrial belt from a random standard belt that is just about the same length.

When comparing to various V-belts, PIX X'tra® is relevant because the series combines raw edge grip with timing flexibility. According to the manufacturer's data, the series can provide higher power transmission than wrapped belts, better heat dissipation and operation at higher belt speeds, provided the belt is used in a correctly constructed belt drive. This makes the series suitable for many industrial operating tasks.

For the XPA profile, the PIX data sheet states the length range 550–5000 mm. This belt with Ld 1120 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

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.

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.

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, Width 1120 mm, 1075 mm, Width 1138 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

After start-up, it is wise to listen for abnormal noise and feel for abnormal heat when it is safe to do so. Slippage, whining, vibrations or black belt dust may indicate incorrect tension, incorrect profile, worn pulleys or excessive load. The fault should be found before the machine continues to run for a long time.

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.

If the belt drive uses multiple belts side by side, the belts should usually be replaced as a set. Belts of different ages or degrees of wear may have different lengths and stiffness, which can distribute the load unevenly. A uniform set provides better opportunity for smooth operation and less risk of one belt pulling more than the others.

In practice, the combination of XPA profile, 13x10 MM and Ld 1120 mm means that the belt works as part of the overall geometry of the belt drive. The rough-edged side surface transfers the force to the pulley, while the teeth on the inside support the flexibility around the pulleys. With correct tension, the belt can work smoothly with a lower risk of heat build-up, slippage and unnecessary wear. The specified Li, Ld and La dimensions also make it clear which measurement line is being described.

The specified profile angle and the belt cross-section affect how the side surfaces lie in the groove. When the pulleys are aligned correctly, the force can be transmitted more evenly and the timing underside of the belt has better working conditions around the pulleys.

Technical questions about XPA V-belts

What does XPA 1120 mean on this belt?

XPA is the profile designation and 1120 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 1075 mm, Ld 1120 mm and La 1138 mm.

Is PIX X'tra® a regular wrapped V-belt?

No. The PIX X'tra® in this series is a moulded raw edge cogged belt. It differs from classic wrapped belts in construction, flexibility and working surface.

When should the belt be replaced?

The belt should be replaced if there are ctiming bars, obvious side surface wear, frayed edges, glazing, squealing, vibrations or repeated retensioning. The pulleys should also be in good condition, as a new belt will wear quickly in damaged grooves.

Do all belts need to be replaced if there are several next to each other?

Yes, in parallel belt drives it is usually best to replace the entire set. Mixing belts of different ages or levels of wear can cause the load to be unevenly distributed, causing one belt to work harder than the others.

Can the belt be used in hot or oily environments?

PIX lists the series as heat and oil resistant, but this does not mean that the belt should run in constant oil contamination or without control of the operating environment. Cleaning, shielding and correct sizing are still important.

What does antistatic performance mean?

Antistatic design means that the belt is designed to reduce static charge under suitable conditions. In specific environments, the final suitability depends on the requirements of the entire plant and relevant approvals.

Belt operation depends on the profile, length, tension and pulley groove matching. Worn or damaged grooves can shorten belt life, while correct alignment and a clean contact surface provide more stable power transmission.

The essence: The key data for this XPA V-belt is: PIX X'tra® series, 13x10 MM, Ld 1120 mm, Li 1075 mm, La 1138 mm, timing underside and raw edge construction. It is relevant after overall match between belt, pulley and drive.