Sprockets

What Are Sprockets?

A sprocket is a toothed wheel that engages with a chain (or a track/belt) to transmit rotational motion and power between shafts. Unlike a smooth pulley, the teeth on a sprocket mesh directly with the links of a chain, preventing slippage. Sprockets are widely used in power transmission and conveying systems — bicycles, motorcycles, industrial conveyors, agricultural equipment, timing systems, and automation machinery. They're typically made from steel, stainless steel, or engineering plastics, depending on load, speed, and environmental requirements.

How to Measure a Sprocket

To correctly identify or order a replacement sprocket, you'll generally need the following measurements/specs:

1. Pitch – the distance between the centers of two adjacent chain rollers (or sprocket teeth). This must match the chain pitch exactly (e.g., #40 chain = 1/2" pitch).
2. Number of teeth (N) – count the teeth around the sprocket; this determines gear ratio when paired with another sprocket.
3. Outside diameter (OD) – the diameter across the outer tips of the teeth.
4. Pitch diameter (PD) – the diameter of the theoretical circle passing through the center of the chain rollers when meshed.
5. Bore/hole diameter – the inner mounting hole diameter (for shaft-mount sprockets), plus keyway dimensions if present.
6. Hub diameter and width – if the sprocket has a hub for set screws or keyways.
7. Overall width / number of strands – single, duplex (double), or triplex (triple) strand, which affects tooth width and spacing.
8. Chain type/size compatibility – e.g., ANSI 40, 50, 60, 80, or metric equivalents (08B, 10B, 12B, etc.)

A quick way to verify pitch: measure across several teeth center-to-center and divide by the number of spaces, or match it directly against the mating chain's pitch.

Our Comprehensive Sprocket Product Range

Sprockets for ANSI Roller Chain (Inch)

• Compliant with ANSI B29.1 standard dimensions.
• Available in a complete range of chain sizes and tooth counts.
• Multiple hub configurations (Type A, B, C) for design flexibility.

Sprockets for Metric Roller Chain

• Manufactured to ISO standards for global compatibility.
• Interchangeable with metric-dimension roller chains.
• Ideal for imported machinery and international specifications.

Sprockets for Miniature Roller Chain

• Engineered for compact and precision applications.
• Ensures accurate motion control in confined spaces.
• Serves specialized equipment and sensitive instrumentation.

Idler Sprockets

• Core function: Maintain optimal chain tension and guide path.
• Reduce vibration and slack to protect the entire drive system.
• Extend the service life of both the chain and other components.

Bushing Bore Sprockets

• Versatile bushing system accommodates multiple shaft diameters.
• Simplify inventory and reduce the need for custom bores.
• Cost-effective solution for flexible mounting requirements.

Industries We Serve

Our sprockets are built to perform in the most demanding environments. You'll find them driving productivity across numerous sectors:

• Material Handling & Logistics: Powering the heart of conveyor belts, sorting systems, and automated warehouse equipment.
• Food & Beverage Processing: Featuring corrosion-resistant options that stand up to rigorous washdown environments.
• Agricultural Machinery: Delivering reliable power transmission in tractors, combines, and planting equipment season after season.
• Heavy-Duty Equipment: Engineered to withstand the extreme demands of construction, mining, and automotive manufacturing applications.

Where to Buy Sprockets?

Lily Bearing offers customized sprockets, including small-batch orders, with fast lead times — typically around 20 days. Our sprockets can serve as a reliable alternative to established U.S. brands, at competitive pricing without compromising on quality.
To get a quote, please provide either:

The model number, or Drawings or detailed specifications, including: structure/type, number of teeth, bore diameter, and the corresponding chain to be used.

With this information, we can quickly confirm feasibility and provide pricing and lead time.

Why Partner with Lily-Bearing?

When you choose Lily-Bearing, you're investing in more than just a component—you're gaining a partner dedicated to your success.

• Proven Quality Assurance: Our ISO 9001 certification and rigorous, multi-stage quality control give you peace of mind.
• Technical Expertise & Support: Our engineering team is ready to provide professional guidance on product selection, custom solutions, and maintenance best practices.
• Global Standard Compliance: All products are manufactured to be fully interchangeable with ANSI, ISO, and JIS standards, ensuring global compatibility and easy sourcing.

Contact us today to discuss your specific requirements or to request a quotation.