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Professional PK Belt Manufacturer in China
ZQDrive PK belt is a serpentine belt specially designed for efficient and compact power transmission. It is widely used in auto engine accessory drive systems, such as generators, air conditioning compressors, water pumps, etc. The “P” in its name stands for metric, and the “K” indicates that this belt type was originally developed for the automotive industry and complies with the SAE J1459 standard.
In addition, ZQDrive PK belt offers high transmission power, long service life, and a maximum belt speed of up to 50 m/s. It also effectively reduces vibration to ensure the stable operation of your vehicle’s engine accessory drive system.
PK Belt By Ribs
3PK Belt
4PK Belt
5PK Belt
6PK Belt
7PK Belt
8PK Belt
9PK Belt
10PK Belt
11PK Belt
12PK Belt
PK Belt for Your Water Pump
ZQDrive PK belts are commonly used in cars to drive water pumps, ensuring coolant circulation and helping the engine maintain optimal operating temperatures. If your PK belt breaks or slips, it can cause the water pump to fail, leading to serious problems such as engine overheating. Replace your vehicle’s belt with a high-performance ZQDrive PK belt today and avoid troublesome breakdowns!
PK Belt for Your Alternator
ZQDrive alternator PK belt is connected to the engine crankshaft, driving the alternator to charge your vehicle’s battery and power the electrical system. It is a core component of the modern automotive engine accessory drive system. This PK belt not only provides efficient and stable power to accessories such as alternators, enabling multi-channel distribution and efficient utilisation of engine power, but also has a heat resistance of up to 150°C, making it particularly suitable for power transmission systems with high bending performance requirements.
If you also want an alternator PK belt like this, ZQDrive is the ideal choice for you.
PK Belt for Your Power Steering Pump
Power steering pump PK belt is a serpentine belt used in auto power steering systems. Our ZQDrive power steering pump PK belt efficiently transfers engine power to the power steering pump, driving the pump to provide hydraulic assistance, making it easier and smoother for you to turn the steering wheel, effectively improving driving stability and safety.
PK Belt for Your A/C Compressor
A/C compressor PK belt is a highly efficient, multi-groove power transmission belt commonly used in modern automotive air conditioning compressors. ZQDrive A/C compressor PK belt powers your vehicle’s air conditioning compressor through a pulley system, enabling the compressor to compress and circulate refrigerant to regulate the temperature inside the vehicle. In addition, it is durable and has excellent transmission performance, making it an important component for ensuring a comfortable environment inside your vehicle.
PK mark generally uses “number + letter + number” format, such as “3PK796”. The meaning is as follows:
- The first number indicates the number of ribs on the belt. For example, “3” represents three ribs.
- The letters “PK” indicate rib pitch 3.56 mm, belt height 6 mm, and wedge angle 40°, which is a standard specification for poly V belt.
- The last number indicates the effective length of the PK belt (unit: mm). For example, “796” represents a length of 796 mm.
Here is an example: “3PK796” indicates that this is a poly v serpentine belt with 3 ribs and a length of 796 mm.
PK belt measurement method:
- PK number on the belt: Simply read the PK number on the belt. This is the most direct and accurate method. Learn how to read the PK number on the belt will help you quickly and accurately select the PK belt that is right for your vehicle.
- When there is no PK number or the number is worn:
We recommend that you first consult your vehicle manual or a professional.
(1)Measure the length of the PK belt: Use a cloth tape measure to measure the outer circumference of the PK belt, ensuring that the belt is naturally straight, without stretching or slack. Do not use a straight ruler to measure the length of the PK belt, as this will result in an inaccurate measurement.
(2)Measure the width and number of ribs of the PK belt:- Number of ribs: Count the number of ribs directly on the belt (protruding ribs). This number is the number before the PK number. For example, “6PK” means 6 ribs.
- Width: Method one is to measure the total width of the belt using a caliper or ruler. Method two is to calculate based on the standard pitch. For the PK belt, the standard pitch for each rib is 3.56 mm, and the total width = number of ribs × 3.56 mm. For example, the theoretical width of a 6PK belt is 6 × 3.56 = 21.36 mm. Actual measurement values may vary slightly, so use the theoretical value as a reference.
Common PK belt length range:
3PK Belt: 550–1285 mm
4PK Belt: 560–1520 mm
5PK Belt: 625–2055 mm
6PK Belt: 675–2680 mm
7PK Belt: 870–2355 mm
8PK Belt: 800–2605 mm
9PK Belt: 1200–4145 mm
10PK Belt: 1108–2063 mm
11PK Belt: 1515–2055 mm
12PK Belt: 1165–2500 mm
The length of commonly used PK belts ranges from 550 mm to 4145 mm, which can meet the needs of most automotive applications.
In engine applications, we recommend that you choose EPDM PK belt as your first choice for the following reasons:
NR: Used for engine accessories that require high wear resistance and flexibility, and are not exposed to high temperatures or frequent contact with oil. NR PK belt has good elasticity and wear resistance, but its heat and oil resistance are average.
CR: Used in applications requiring heat resistance, oil resistance, and ageing resistance, it can operate stably within a common temperature range and is suitable for most conventional engine environments. CR PK belt offers balanced performance, good weather resistance, and flame retardancy.
EPDM: Used in high-temperature, strong ultraviolet light, ozone, and chemical corrosion environments, commonly used in modern engine compartments with high temperature and long service life requirements. EPDM PK belts are heat-resistant, age-resistant, ozone-resistant, wear-resistant, and have a long service life.
When you choose a PK belt, it is recommended that you consider the specific conditions of the engine (temperature, service life requirements, etc.) before making your choice. All three materials can meet the basic requirements of your engine PK belt, but each has its strengths.
In heavy truck transportation scenarios, the warranty mileage for the PK belt is as follows:
NR PK belt: 20,000 to 30,000 km
CR PK belt: 50,000 to 80,000 km
EPDM PK belt: 100,000 to 150,000 km
The above data represents the normal service life range for the PK belt, based on heavy truck transportation environments.