V-belt XPZ 887 - 10x8 MM - PIX X'tra ®

V-belt XPZ 887 - 10x8 MM - PIX X'tra ® for industrial belt drives with XPZ profile

V-belt XPZ 887 - 10x8 MM - PIX X'tra ® is a rough-edged and timing narrow V-belt in XPZ profile for mechanical power transmission in V-belt drives. The belt is specified with profile XPZ, goal 10x8MM, Ld 887mm, Li 850mm and La 900mm.

XPZ is the lightest profile in the XP series and is typically used when the machine requires a narrow, Cogged V-belts with high flexibility. It should be used in pulleys that fit XPZ and 10x8MMA 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: XPZ
• Goal: 10x8MM
• Effective length: Ld 887 mm
• Inner length: 850 mm
• External length: Width 900 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 XPZ 887 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 887 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 XPZ profile, the PIX data sheet states the length range 550–5000 mm. This belt with Ld 887 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 XPZ 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 XPZ 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 XPZ belt is relevant in small and medium-sized belt drives, where correct fit and low overall height are more important than a very wide 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 an incorrect cross-section.

Profile and pulley compatibility

XPZ belongs to the same narrow profile family as SPZ, 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 XPZ, 10x8MM, Ld 887 mm, 850 mm, Width 900 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.

During operation, the belt does not only function as a length indicator, but as a dimensionally stable component in a mechanical belt drive. The XPZ profile, the width/height 10x8 MM and the effective length Ld 887 mm form the basis for the belt's placement in the groove. The timing underside helps the belt around the pulleys, while the rough side surfaces transmit the force. The combination is particularly relevant when smooth running and limited heat generation are important for the service life of the system.

In parallel belt drives, uniform tension and wear are important for load distribution. When multiple belts are working side by side, differences in length, stiffness, or groove placement can cause one belt to work harder than the others.

Technical questions about XPZ V-belts

What does XPZ 887 mean on this belt?

XPZ is the profile designation and 887 refers to the effective length Ld in millimeters. For this item, this means that the belt is specified as XPZ profile with dimensions 10x8 MM, Li 850 mm, Ld 887 mm and La 900 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.

The essence: The key data for this XPZ V-belt is: PIX X'tra® series, 10x8 MM, Ld 887 mm, Li 850 mm, La 900 mm, timing underside and raw edge construction. It is relevant after overall match between belt, pulley and drive.