1 Inch Chain Sprocket, Heat Treated, 16B2-17

Detailed Product Review

This 1 Inch Chain Sprocket, Heat Treated, 16B2-17 is a critical mechanical component designed for industrial power transmission systems to transmit rotational motion and torque from a driving shaft to a driven shaft via a double-row chain. The primary function of the product is to transfer mechanical energy from a primary drive unit, such as a motor or gearbox, to a secondary system at a specific speed ratio by precisely engaging with the chain sprockets. The 17-tooth profile ensures that the chain sprockets seat into the tooth roots and contact the tooth flanks in accordance with the ISO/R 606 standard, achieving power transmission with minimal friction and maximum efficiency. The double-row (duplex) structure of this sprocket distributes the load across two parallel chain lines compared to its single-row counterparts, providing higher torque capacity and more stable transmission. Furthermore, the applied heat treatment increases the hardness and wear resistance of the tooth surfaces, ensuring the geometric integrity of the tooth profiles even under continuous and dynamic loads, and guaranteeing the system’s long-term operation. This offers a critical engineering advantage, especially in systems operating under sudden load changes, shock loads, and high speeds.

The product is made of high-quality C45 carbon steel, followed by a special heat treatment applied to the tooth profiles and critical surfaces. This heat treatment transforms the material’s microstructure, creating a high-hardness (typically martensitic) layer on the surface while leaving a tougher, impact-resistant structure in the core. This differential hardness profile optimizes the sprocket’s resistance to both wear and fatigue. For system integration, this sprocket is fully compatible with 16B-2 standard double-row chains with a 1-inch (25.4 mm) pitch and features a hub structure suitable for standard shaft diameters (typically with a keyway and setscrew connection points). Precision machining facilitates correct alignment with the shaft via a tight fit or key connection, thereby minimizing premature wear and vibration caused by axial and angular misalignments. Its wide application areas include conveyor systems, agricultural machinery, mining equipment, cement plants, packaging and packing machines, mixers in food processing plants, and industrial automation lines that require high torque and continuous operation. This sprocket is designed to provide reliable and efficient power transmission under heavy-duty conditions. Mermak supplies this product to customers in the United Kingdom, United States, Canada, Australia, Ireland, New Zealand, South Africa, and similar countries/international markets.

Optimized Heat Treatment for Superior Wear and Fatigue Resistance: The professional heat treatment applied to this sprocket significantly increases the surface hardness of the material, maximizing the resistance of the tooth profiles to friction, abrasive wear, and surface fatigue mechanisms such as pitting. This process creates a martensitic microstructure in the tooth surface contact areas, providing a hardness profile that extends operational life and lengthens maintenance intervals. Simultaneously, a tougher structure is maintained in the core of the sprocket, which increases fatigue resistance against sudden impact loads and repetitive stresses, thereby minimizing the risk of tooth fracture. This engineering approach ensures that the sprocket maintains its form and functional precision for a long time, even in harsh industrial environments, which directly reduces the total cost of ownership.

Increased Torque Capacity and Load Distribution with Double-Row (Duplex) Configuration: The double-row design, compliant with the 16B-2 standard, allows for the safe transmission of much higher torque values compared to single-row sprockets by evenly distributing the power transmission load across two parallel chain lines. This structural advantage reduces the unit stress on each chain link and sprocket tooth, which slows down chain elongation and extends the life of both the chain and the sprocket. The wider distribution of load increases the system’s resistance to shock loads while also offering a compact solution for applications requiring high power density. This engineering feature is a critical performance parameter, especially for heavy-duty industrial applications where high-power motors are used and continuous, reliable power transmission is required.

Optimized Kinematics with Precision Tooth Geometry Compliant with ISO/R 606 Standard: This 17-tooth sprocket is manufactured using modern CNC machining centers in full compliance with the ISO/R 606 international standard. This precise manufacturing process keeps the geometric tolerances of the tooth profiles (typically involute or cycloidal), the tooth pitch, and the pitch diameter within extremely narrow limits. As a result, a perfect engagement is achieved between the chain sprockets and the teeth, which minimizes speed fluctuations and vibrations known as the “chordal effect” (polygonal effect). The precise tooth profile increases mechanical efficiency by reducing energy loss during power transmission, lowers noise levels, and optimizes the dynamic loads between the chain and the sprocket. This kinematic optimization directly contributes to smoother, quieter, and longer-lasting system operation, thereby maximizing operational reliability and performance continuity.

Technical Specifications and Capacity

Technical Frequently Asked Questions (FAQ)

What type of heat treatment is applied to this sprocket, and what are its effects on the material’s microstructure?

Surface hardening processes such as induction hardening or flame hardening are typically applied to this 16 B2-17 chain sprocket. This thermal treatment involves heating the tooth profiles’ surface layer to high temperatures and then rapidly cooling it. This rapid cooling causes the austenite phase within the steel to transform into a very hard and brittle phase called martensite. As a result, high hardness, typically in the range of 50-60 HRC (Rockwell Hardness C scale), is achieved on the tooth surfaces. This hardened layer dramatically increases the sprocket’s resistance to abrasive wear, pitting, and surface fatigue. Simultaneously, the core of the sprocket remains in a softer (e.g., 25-35 HRC) and tougher pearlitic or bainitic structure. This differential hardness profile ensures that the sprocket has both high surface strength and core toughness capable of absorbing impact loads, thereby optimizing its overall mechanical performance and lifespan.

What does “16 B2” mean in the product code “16 B2-17”, and how does this affect the sprocket’s performance?

The “16 B” part of the product code “16 B2-17” refers to the “B Series” and the “16” pitch size according to the ISO/R 606 international standard for the chain the sprocket is compatible with. The number “16” indicates that the nominal pitch of the chain is 1 inch (25.40 mm). The “B” series indicates that the roller diameter and other sizing parameters of the chain conform to a specific international standard. The number “2” in the code indicates that the sprocket has a “double-row” (duplex) configuration. This double-row design significantly increases the power transmission capacity by distributing the load across two parallel chain lines compared to single-row sprockets. This reduces the stress on each chain link and sprocket tooth, which minimizes chain elongation and extends the overall life of the system. Furthermore, the double-row structure offers the ability to transmit higher torque values more safely and stably, which is a critical performance advantage, especially for heavy-duty and high-power industrial applications. The “17” refers to the number of teeth on the sprocket.

Why is the sprocket’s pitch diameter a critical parameter, and how is this value calculated?

The sprocket’s pitch diameter (d) is the diameter of the theoretical circle passing through the centers of the chain rollers and is a critical parameter in the design and analysis of power transmission systems. This diameter is essential for ensuring that the chain sits properly on the sprocket and transmits power at a constant speed ratio. Correct pitch diameter ensures that the chain rollers engage correctly with the sprocket teeth, minimizing speed fluctuations known as the “chordal effect” (polygonal effect), and consequently reducing vibration, noise, and wear. This value is calculated using the chain pitch (P) and the number of teeth (Z) with the following formula: d = P / sin(180°/Z). This formula guarantees the kinematic compatibility between the sprocket and the chain. Any deviation in the pitch diameter can lead to irregularities in chain tension, premature chain elongation, abnormal wear on the sprocket and chain, and a decrease in power transmission efficiency. Therefore, precise manufacturing and correct calculation are vital for the long-term and efficient operation of the system.

Are there any special mounting or maintenance procedures to consider when using a heat-treated double-row sprocket?

To maximize the performance and lifespan of a heat-treated double-row sprocket, special mounting and maintenance procedures must be meticulously followed. During installation, ensure that the driving and driven sprockets are perfectly aligned axially, angularly, and in parallel offset. In double-row systems, it is critical that both chain lines have the same tension and that the sprockets operate on parallel axes; misalignment will cause uneven load distribution on the chain, premature elongation, and one-sided wear on the sprockets. Chain tension should be set to the manufacturer’s recommended values (usually a specific amount of sag); excessive tension overloads bearings and shafts, while excessive slack can cause the chain to whip, jump, and come off the sprocket. Regular and proper lubrication is vital for double-row chain systems. A lubricant with a viscosity suitable for the operating speed, load conditions, and ambient temperature should be selected and applied using an appropriate lubrication method such as drip, bath, or spray. Lubrication prevents wear by reducing friction between the sprocket teeth and chain rollers, controls heat generation, and provides protection against corrosion. Periodically inspect the sprockets and chains for signs of wear, corrosion, or damage, and perform replacement or adjustment operations as necessary. Adherence to these procedures ensures that the full benefits of durability and high torque capacity provided by the heat-treated sprocket are utilized.

Mermak has 16 years of experience, operating from our factory/warehouse in Ankara Uzay Sanayi. Our website displays up-to-date stock quantities and prices. Stocked products are dispatched directly from our warehouse without production delays. We ensure careful packaging, meticulous invoice and document follow-up, and utilize reliable logistics partners. The Mermak team closely monitors the shipment process. Product videos and factory tours are available upon request via WhatsApp or our contact channels.