PIV Chains
PIV chains are also called Positively Infinitely Variable chains and are designed specifically for gearboxes. The chain has a variable pitch due to the chain's structure consisting of multiple individual plates that can move independently. This adaptability allows the chain to engage with grooves that have varying diameters from the edge to the center of the gearbox wheel. Please give us a call or submit a form online if you need any assistance identifying your PIV chain.
Dixie Industrial Sales is a trusted distributor and supplier of positively infinitely variable chains. Contact us to request a quote today!

Overview & Materials Of PIV Chains
PIV chains consist of multiple individual plates that move independently. The plates create a uniform pitch that maintains consistent contact with the gear system’s sprockets. The chain usually operates on pulleys or grooved wheels with varying diameters from the edge to the center of the gearbox wheel, allowing precise, uninterrupted speed and torque changes.
Manufacturers use durable and wear-resistant materials to make PIV chains, including:
- Hardened steel
- Alloyed steel
The exact choice of material depends on the size of the load and the application’s conditions or environment. Contact us to speak with one of our experts and find the exact PIV chain you need today!

Industries & Applications That Use PIV Gear Systems
PIV chains are commonly used in textile production lines, printing press machines, packaging line equipment, and other machinery. Since their introduction in 1928, PIV drives have significantly grown in popularity for industrial power transmission. The unique characteristics of PIV chain drives make them highly adaptable for nearly any industrial application, and their reliability has ensured their continued use in various industrial settings.
PIV gear systems are necessary for industry applications that need precise control over speed and torque, which include:
- Water and Wastewater Treatment: Filtration and treatment process pumps
- Agriculture: Automated seed planting equipment
- Food: Dough mixing machines
- Lumber: Wood-cutting CNC machines
PIV chains can satisfy a wide range of applications, from metalworking machines to printing presses to large-scale material handling systems. Contact us to find the right PIV chain for your application today!
Trusted Supplier of PIV Chains
Our top-quality PIV Chains and their in stock availability has quickly made Dixie Industrial Sales a key supplier for replacement PIV chains. We maintain a comprehensive inventory of PIV chains, including the LB series: 1LB, 2LB, 3LB, 4LB, 5LB, and 6LB.
Additionally, we offer interchanges for other types of PIV chains, such as cylinder roller PIV chains. We also provide replacement PIV wheels and couplings for these units. For more information or to request a quote on our replacement PIV chains, please contact our customer service team, who are eager to assist you!
Certifications and Standards That Apply to PIV Chains
The following certifications and standards ensure you’re getting top-quality components:
- ISO 9001: Certifies quality management systems
- ANSI B29.1: Governs roller chain specifications in power transmissions
- ISO 606: Outlines roller chain dimensions, designations, and tolerances
These standards also oversee product compatibility and safety regulations. When you choose PIV chains from Dixie Industrial, you can trust they meet the highest industry standards. Contact us today to find the right certified components for your application.
Find Your PIV Chain Part Number
Select Product
Size 1 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. of Blocks |
1LB25 | P125 | 1-22 | P1 or A1 | 25 |
1LB26 | P126 | 1-23 | P1 or A1 | 26 |
1LB27 | P127 | 1-27 | P1 or A1 | 27 |
1LB29 | P129 | 1-29 | P1 or A1 | 29 |
1LB30 | P130 | 1-30 | P1 or A1 | 30 |
1LB31 | P131 | 1-31 | P1 or A1 | 31 |
1LB32 | P132 | 1-32 | P1 or A1 | 32 |
1LB33 | P133 | 1-33 | P1 or A1 | 33 |
1LB34 | P134 | 1-34 | P1 or A1 | 34 |
1LB36 | P136 | 1-36 | P1 or A1 | 36 |
1LB37 | P137 | 1-37 | P1 or A1 | 37 |
Size 2 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. of Blocks |
2LB24 | P224 | 2-24 | P2, A2 or VZ2 | 24 |
2LB25 | P225 | 2-25 | P2, A2 or VZ2 | 25 |
2LB26 | P226 | 2-26 | P2, A2 or VZ2 | 26 |
2LB27 | P227 | 2-27 | P2, A2 or VZ2 | 27 |
2LB28 | P228 | 2-28 | P2, A2 or VZ2 | 28 |
2LB29 | P229 | 2-29 | P2, A2 or VZ2 | 29 |
2LB30 | P230 | 2-30 | P2, A2 or VZ2 | 30 |
2LB31 | P231 | 2-31 | P2, A2 or VZ2 | 31 |
2LB32 | P232 | 2-32 | P2, A2 or VZ2 | 32 |
2LB33 | P233 | 2-33 | P2, A2 or VZ2 | 33 |
2LB34 | P234 | 2-34 | P2, A2 or VZ2 | 34 |
2LB35 | P235 | 2-35 | P2, A2 or VZ2 | 35 |
Size 3 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. Of Blocks |
3LB26 | P326 | 3-26 | P3, A3, or VZ3 | 26 |
3LB27 | P327 | 3-27 | P3, A3, or VZ3 | 27 |
3LB28 | P328 | 3-28 | P3, A3, or VZ3 | 28 |
3LB29 | P329 | 3-29 | P3, A3, or VZ3 | 29 |
3LB31 | P331 | 3-31 | P3, A3, or VZ3 | 31 |
3LB32 | P332 | 3-32 | P3, A3, or VZ3 | 32 |
3LB33 | P333 | 3-33 | P3, A3, or VZ3 | 33 |
3LB34 | P334 | 3-34 | P3, A3, or VZ3 | 34 |
3LB35 | P335 | 3-35 | P3, A3, or VZ3 | 35 |
3LB36 | P336 | 3-36 | P3, A3, or VZ3 | 36 |
3LB38 | P338 | 3-38 | P3, A3, or VZ3 | 38 |
3LB40 | P340 | 3-40 | P3, A3, or VZ3 | 40 |
Size 4 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. Of Blocks |
4LB25 | P425 | 4-25 | P4, A4, or VZ4 | 25 |
4LB26 | P426 | 4-26 | P4, A4, or VZ4 | 26 |
4LB27 | P427 | 4-27 | P4, A4, or VZ4 | 27 |
4LB28 | P428 | 4-28 | P4, A4, or VZ4 | 28 |
4LB29 | P429 | 4-29 | P4, A4, or VZ4 | 29 |
4LB30 | P430 | 4-30 | P4, A4, or VZ4 | 30 |
4LB31 | P431 | 4-31 | P4, A4, or VZ4 | 31 |
4LB32 | P432 | 4-32 | P4, A4, or VZ4 | 32 |
4LB33 | P433 | 4-33 | P4, A4, or VZ4 | 33 |
4LB34 | P434 | 4-34 | P4, A4, or VZ4 | 34 |
Size 5 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. of Blocks |
5LB33 | P533 | 5-28 | P5, A5 or VZ5 | 33 |
5LB36 | P536 | 5-30 | P5, A5 or VZ5 | 36 |
5LB38 | P538 | 5-32 | P5, A5 or VZ5 | 38 |
5LB39 | P539 | 5-33 | P5, A5 or VZ5 | 39 |
5LB41 | P541 | 5-34 | P5, A5 or VZ5 | 41 |
5LB42 | P542 | 5-35 | P5, A5 or VZ5 | 42 |
5LB47 | P547 | 5-39 | P5, A5 or VZ5 | 47 |
Size 6 PIV
Part Number | Interchange 1 | Interchange 2 | Block Type | No. of Blocks |
6LB32 | P632 | 6-28 | P6, A6, or VZ6 | 32 |
6LB33 | P633 | 6-29 | P6, A6, or VZ6 | 33 |
6LB40 | P640 | 6-35 | P6, A6, or VZ6 | 40 |
6LB41 | P641 | 6-36 | P6, A6, or VZ6 | 41 |
6LB43 | P643 | 6-38 | P6, A6, or VZ6 | 43 |
6LB44 | P645 | 6-39 | P6, A6, or VZ6 | 44 |
More Than an Industrial Supplier
At Dixie Industrial, we do more than provide high-quality transmission components; we deliver solutions that keep your operations running smoothly. Our expert technicians can perform on-site gearbox repairs and offer a range of additional services to support your equipment needs. Contact us today for assistance with identifying your PIV chain, exploring our product offerings, or requesting a quote tailored to your application.
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