All about Poly-V Ribbed Belt/PK Belt you need to know.

What is a Poly-V Ribbed Belt?

  • A Poly-V ribbed belt, also known as a multi-rib belt, PK Belt, is a type of power transmission belt used in a variety of industrial and automotive applications. It is designed to transfer power from the engine to various components such as the alternator, air conditioning compressor, and power steering pump. The belt features multiple longitudinal ribs along its inner surface, which make contact with the grooves on the pulleys it drives.

  • One of the key benefits of a Poly-V ribbed belt is its ability to transmit power more efficiently and with less vibration compared to traditional V-belts. The increased surface area of the ribs allows for greater power transmission, while the flexibility of the belt reduces noise and vibration during operation. This makes it an ideal choice for applications where smooth and quiet power transmission is essential.

V Ribbed Belt, PK BELT, PRO-V BELT (EPDM and CR Quality)
  • Poly-V ribbed belts are also known for their durability and resistance to wear and tear. They are typically made from high-quality materials such as EPDM and CR, which enables them to withstand the rigors of constant use in demanding industrial environments. Additionally, their design allows for better heat dissipation, further prolonging their lifespan.

Poly-V Ribbed Belt Structure:

The construction of timing belts involves several key components that work together to ensure precise and reliable performance. It is typically made of rubber and reinforced with nylon cords or other materials to provide strength and durability. It is designed to withstand high temperatures and pressures, as well as the continuous movement and vibration of the engine. The teeth on the belt mesh with the gears on the crankshaft and camshaft(s), ensuring that they rotate in perfect harmony.

1. Upper Fabric: Flexible oil and heat-resistant backing extend belt life.

  • Upper fabric plays a critical role in protecting the belt from oil and heat. By using a flexible and heat-resistant backing material, V Ribbed belts are able to withstand high temperatures and maintain their integrity in challenging operating conditions. This feature not only extends the belt life but also ensures consistent performance over time.

2. Tensile Cord: Strong tensile cords carry high horsepower loads without stretching.

  • Tensile cord which is responsible for carrying high horsepower loads without stretching.
  • The strength of the tensile cords is crucial in maintaining the belt’s ability to transmit power efficiently and effectively.

3. Tensile Cord: Strong tensile cords carry high horsepower loads without stretching.

  • Rubber: compounded from high-strength synthetic rubber, offering superior wear resistance and a longer lifespan.
  • The quality of the rubber used in the construction of V Ribbed belts is crucial in ensuring that the belt can withstand the wear and tear of daily use without experiencing premature failure or damage. The high-strength synthetic rubber ribs provide increased durability and resistance to abrasion, making V Ribbed belts a reliable choice for demanding applications.
V Ribbed Belt, PK BELT, PRO-V BELT, ALTERNATOR POLLY BELT, EPDM BELT, CR PK BELT

Micro Ribbed V Belt Performance Features

— Better grip, less slip resulting in a quieter operation.

 — Precise metric sizing and machine cut ribs for a more exact OE fit.

 — EPDM compounding for longer life span.

— Soft compound backing to reduce noise.

 — Bidirectional cord to eliminate tracking.

 — Operating temperature range from -40℃ to +120℃.

 — Oil, heat, ozone and abrasion resistant.

V Ribbed Belt, PK BELT, PRO-V BELT, ALTERNATOR POLLY BELT, EPDM BELT, CR PK BELT

How to read a PK Number

Most v-ribbed belts, commonly referred to as serpentine belts, contain two different part numbers. The first one is the manufacturer’s part number, like Contitech alsways start with CT. The second, and mostly known one, is a global industry standard number that indicates the size of the belt. This industry standard number, frequently denoted as the “PK” number, is printed next to the manufacturer’s part number on almost every serpentine belt produced, like 6PK1203

The PK number is broken down into three pieces of information:
» Number of ribs on the belt
» Belt application information
» Effective length of the belt expressed in millimeters
EXAMPLE: 6PK1203
» 6 – This indicates the number of ribs on the belt; therefore, this is a 6-rib belt.
» PK – The “P” indicates a metric designation, and the “K” indicates the belt is automotive per SAE J1459.
» 1203 – This is the effective length of the belt expressed in millimeters.

All about Poly-V Ribbed Belt/PK Belt you need to know.

Crossing company Poly-V Ribbed belt reference number:

3PK5106PK8888PK96010PK24256PK788
3PK6106PK8908PK97016PK7168PK1218
3PK6306PK8948PK97510PK23558PK1255
3PK6686PK9388PK9808PK18158PK1509
3PK7506PK9858PK9956PK21558PK1520
3PK7607PK17598PK10054PK10288PK1538
3PK7637PK19058PK10104PK8788PK1550
3PK8507PK19338PK10205PK9458PK1582
3PK8557PK19358PK10255PK10658PK1985
3PK8907PK20928PK10305PK15888PK1988
4PK10107PK22808PK10506PK20138PK2043
4PK10258PK14208PK10556PK6758PK2120
4PK10268PK24108PK10604PK9938PK2163
4PK10304PK6138PK10754PK11088PK2215
4PK10804PK7208PK10806PK15708PK2575
4PK11004PK7608PK11257PK17308PK900
4PK11104PK7788PK11757PK22558PK1035
4PK11704PK8908PK12007PK22658PK1720
4PK11804PK9458PK12254PK90510PK1447
4PK11855PK13408PK12456PK20009PK1285
4PK12005PK18018PK12505PK91510PK1215
4PK12105PK18118PK12604PK7738PK1688
4PK17105PK18408PK12705PK124012PK1835
4PK17205PK8308PK12805PK16854PK1041
4PK17706PK10208PK12853PK6606PK736
4PK6686PK14958PK12904PK6356PK770
4PK6846PK16258PK13004PK9786PK807
4PK7386PK20108PK13205PK12436PK1098
4PK7506PK25848PK13404PK7638PK1418
4PK8006PK9868PK13424PK9708PK1435
4PK8037PK15168PK13456PK10058PK1485
4PK8057PK22548PK13506PK10138PK1565
4PK8107PK22688PK13556PK20308PK1620
4PK8127PK9908PK13606PK20808PK1665
4PK8153PK5008PK13656PK21258PK1682
4PK8203PK6808PK13706PK24158PK1727
4PK8253PK7108PK13808PK19088PK2256
4PK8303PK9758PK13858PK205510PK1068
4PK8354PK10008PK13889PK23008PK1054
4PK8404PK10508PK13909PK18853PK635
4PK8454PK10608PK13959PK28353PK760
4PK8504PK10658PK140011PK18903PK800
4PK8554PK12158PK142511PK28353PK850
4PK8604PK13108PK143011PK28713PK851
4PK8654PK6008PK14404PK8534PK1003
4PK8704PK7258PK14505PK7884PK1005
4PK8754PK7908PK14605PK8104PK1029
4PK8854PK9958PK14655PK8354PK1065
4PK8955PK10508PK14705PK8624PK1067
4PK9005PK11058PK14755PK8904PK1120
4PK9155PK11378PK14805PK9004PK1168
4PK9205PK11658PK14955PK9074PK1181
4PK9255PK13058PK15005PK9214PK610
4PK9265PK13458PK15105PK10054PK785
4PK9305PK13708PK15155PK11524PK787
4PK9385PK18158PK15255PK18854PK826
4PK9405PK6908PK15265PK20304PK843
4PK9505PK8258PK15376PK10824PK851
4PK9625PK8408PK15406PK11854PK864
4PK9855PK8558PK15606PK15104PK875
4PK9985PK8858PK15906PK15384PK876
5PK10105PK9658PK16006PK15584PK889
5PK10706PK11958PK16096PK16374PK890
5PK10806PK12058PK16126PK16404PK900
5PK10906PK12158PK16156PK16604PK902
5PK11006PK12858PK16306PK16834PK914
5PK11106PK13058PK16406PK17054PK915
5PK11136PK13108PK16506PK17404PK925
5PK11156PK15158PK16706PK18364PK927
5PK11406PK15258PK16756PK18734PK947
5PK13906PK15758PK16806PK20904PK990
5PK13956PK15858PK16907PK16295PK1015
5PK18886PK16158PK17004PK12385PK1016
5PK8656PK16308PK17155PK13005PK1029
5PK8686PK17008PK17255PK14355PK1030
5PK8756PK17258PK17406DPK12005PK1168
5PK9406PK18308PK17456DPK13205PK1207
5PK9506PK18408PK17506PK11205PK1220
5PK9606PK19108PK17606PK11805PK1295
5PK9626PK19158PK17706PK12905PK1600
5PK9706PK19708PK17756PK12935PK1636
5PK9756PK19758PK17806PK12955PK1790
6PK10006PK19958PK17906PK13255PK1791
6PK10186PK20558PK17956PK13405PK2121
6PK10356PK20658PK18006PK13455PK2255
6PK10406PK21608PK18036PK16105PK2256
6PK10546PK21708PK18256PK16235PK876
6PK10706PK22008PK18306PK16356PK1040
6PK10956PK22058PK18406PK16756PK1041
6PK11006PK22108PK18506PK16856PK1090
6PK11056PK22208PK18606PK16906PK1092
6PK11106PK22758PK18906PK17656PK1107
6PK11136PK22858PK18956PK18506PK1143
6PK11156PK23108PK19006PK18636PK1145
6PK11256PK23758PK19256PK18756PK1194
6PK11506PK24508PK19306PK18906PK1207
6PK11906PK24908PK19506PK19006PK1321
6PK12006PK25108PK19606PK22606PK1334
6PK12106PK25658PK19756PK22806PK1345
6PK12306PK25808PK19906PK23736PK1346
6PK12556PK28158PK20006PK24036PK1422
6PK12576PK28258PK20106PK24606PK1537
6PK12686PK28308PK20156PK24806PK1600
6PK12756PK28708PK20206PK24956PK1651
6PK13356PK9408PK20406PK26156PK1676
6PK14136PK9658PK20756PK26506PK1700
6PK15407PK10208PK20806PK26806PK1727
6PK15557PK10808PK20856PK7376PK1740
6PK15807PK10958PK21006PK7456PK1791
6PK15907PK12758PK21256PK7516PK1803
6PK16287PK14758PK21356PK7806PK1816
6PK16957PK15158PK21406PK8606PK1875
6PK17307PK15908PK21456PK8636PK1877
6PK17337PK16058PK21506PK9506PK1892
6PK17357PK16258PK21597PK25356PK1969
6PK17367PK16408PK21606PK11526PK2070
6PK17557PK16608PK21705PK10636PK2096
6PK17637PK17058PK21905PK13306PK2115
6PK18007PK17358PK22005PK10956PK2121
6PK18107PK17408PK22354PK11906PK2134
6PK18157PK17508PK22754PK7086PK2159
6PK18207PK17808PK22856PK17956PK2184
6PK18657PK18358PK22955PK7756PK2195
6PK18707PK19208PK23355PK12906PK2197
6PK18807PK20508PK23503PK7836PK2223
6PK18857PK22758PK23583PK9156PK2225
6PK19307PK23008PK23603PK10006PK2230
6PK19407PK26728PK23756PK10456PK2248
6PK20457PK28758PK24006PK13006PK2250
6PK20957PK29408PK24606PK10256PK2299
6PK21003PK5458PK24653PK10056PK2324
6PK21033PK5608PK24753PK8386PK2344
6PK21203PK5658PK25853PK8536PK2345
6PK21353PK7908PK27004PK9656PK2350
6PK21404PK5958PK27504PK10636PK2388
6PK21954PK6308PK28004PK14206PK2390
6PK22644PK6409PK11546PK7306PK2400
6PK6984PK6759PK14256PK8186PK2413
6PK7384PK6989PK14756PK10336PK2415
6PK8834PK7009PK18004PK7156PK2425
6PK8844PK7409PK18904PK7056PK2426
6PK9004PK8889PK21004PK10356PK2438
6PK9054PK9609PK22506PK7256PK2440
6PK9064PK9809PK22953PK8806PK2459
6PK9254PK10059PK23354PK9136PK2464
6PK9354PK10409PK23385PK9636PK2465
6PK9554PK10709PK23406PK9136PK2489
6PK9954PK10759PK28716PK11756PK2490
7PK10764PK10859PK28906PK14636PK2502
7PK11404PK109010PK11255PK11386PK2515
7PK15504PK109510PK12674PK8136PK2553
7PK19104PK115010PK12707PK12886PK2590
7PK19304PK122510PK12856PK9886PK2591
7PK19404PK132010PK12874PK7886PK2604
7PK19564PK133510PK13403PK7136PK2605
7PK20905PK54010PK13423PK7386PK2619
7PK21205PK69410PK13453PK9636PK2769
7PK21505PK71510PK13605PK8506PK990
7PK22855PK87010PK13653PK8886PK991
8PK12305PK92510PK13706PK7507PK1659
8PK12755PK102510PK13806PK19257PK2245
8PK13975PK104510PK14005PK13257PK2248
8PK15355PK104910PK14486PK11387PK2250
8PK15485PK125310PK14506PK16387PK2470
8PK16255PK126010PK14606PK10637PK2471
8PK19105PK132010PK14656PK10757PK2475
8PK19145PK151210PK14706PK9637PK2477
8PK20965PK152510PK14815PK10887PK2569
8PK21055PK165010PK15126PK14383PK635
8PK21306PK77110PK15134PK5883PK650
9PK21256PK77510PK15254PK6383PK655
10PK15806PK78310PK15355PK13503PK665
10PK16886PK79410PK15374PK11253PK815
10PK21086PK87510PK15607PK24183PK820
10PK2700 6PK99810PK15655PK12383PK830
11PK20176PK108010PK16254PK9754PK710
3PK12006PK110310PK16305PK9384PK735
4PK12406PK119910PK17006PK17504PK745
4PK12456PK122810PK17156PK13384PK755
4PK6506PK126010PK17856PK9754PK765
4PK7756PK128010PK18104PK9884PK770
4PK7806PK132010PK24654PK10384PK785
4PK8416PK138010PK24704PK11884PK795
4PK8806PK139010PK24755PK11634PK910
4PK9356PK140010PK27006PK22384PK955
4PK9466PK141512PK18206PK22884PK1015
4PK9906PK142012PK18255PK10384PK1020
5PK10006PK142312PK18355PK11504PK1045
5PK10136PK142512PK18503PK6884PK1055
5PK10306PK147512PK18543PK8254PK1105
5PK10356PK154514PK17405PK12004PK1115
5PK11256PK16485PJ12704PK9634PK1130
5PK13806PK16658PJ11203PK9134PK1135
5PK13886PK167720PJ7623PK6634PK1140
5PK17506PK171016PJ13203PK7884PK1145
5PK8806PK179065YU133PK8754PK1155
5PK9466PK1822107YU224PK7134PK1160
6DPK11956PK20756PK23645PK6884PK1165
6PK10306PK21306PK23656PK16504PK1175
6PK10506PK21553PK7965PK15504PK1195
6PK10556PK22154PK8625PK16384PK1205
6PK10656PK22344PK13255PK8384PK1220
6PK10856PK22355PK7166PK12384PK1290
6PK11656PK22575PK8004PK8634PK1295
6PK14626PK23255PK8205PK12254PK1300
6PK15506PK24755PK9106PK15634PK1305
6PK19046PK25355PK12695PK12134PK1315
6PK19556PK25456PK10086PK8005PK805
6PK20506PK25956PK13506PK10385PK815
6PK21457PK11276PK20566PK18885PK845
6PK22258PK7906PK27946PK19385PK860
6PK22408PK7956PK21624PK8385PK980
6PK22458PK8008PK8205PK9135PK985
6PK22508PK8308PK11206PK14885PK990
6PK22558PK8458PK8405PK8885PK995
6PK23008PK8908PK18355PK12505PK1060
6PK23808PK9208PK18553PK6255PK1075
6PK23858PK9259PK16905PK8635PK1215
6PK23908PK9309PK24403PK8135PK1265
6PK8208PK94510PK7005PK11885PK1270
6PK8258PK95010PK17405PK12885PK1275
5PK12855PK13156PK18256PK18355PK1280
5PK13106PK11309PK283512PK28359PK2425

How Long A PK Belt Lasts?

The lifespan of a V-ribbed belt can vary depending on several factors including the quality of the belt, driving conditions, and maintenance practices. On average, a V-ribbed belt can last anywhere from 50,000 to 100,000 miles.

One of the key indicators that a V-ribbed belt needs to be replaced is visible cracking, fraying, or glazing on the belt. If the belt appears worn or damaged, it is recommended to have it inspected by a professional mechanic and replaced if necessary. In addition, if you notice any squealing noises coming from the engine, it could be a sign that the belt is slipping and needs to be replaced.

Regular maintenance is essential to prolonging the lifespan of a V-ribbed belt. This includes checking the tension of the belt, ensuring proper alignment, and replacing the belt according to the manufacturer’s recommended schedule. Neglecting to maintain the belt can lead to premature wear and potential damage to other engine components.

Crossing related Automotive Belt as below:

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