3/8" Roller Chain Pilot Bore Sprockets – Precision-Cut Sprockets for Industrial Drives

Explore our premium range of 3/8" roller chain pilot bore sprockets, engineered for durability, strength, and reliable power transmission. At Bolton Engineering Products Ltd (BEP Ltd), we supply high-quality sprockets—including stainless steel roller chain sprockets—designed to deliver precise chain engagement, long service life, and exceptional performance in industrial and mechanical applications.

Whether you need a 9 tooth sprocket, a larger diameter sprocket, or custom machining, our collection provides a wide variety of options for every requirement.

What Is a Pilot Bore Sprocket?

A pilot bore sprocket, also known as a rough stock bore sprocket, is supplied with an oversized bore so the buyer can machine it to the exact shaft size required.
This allows flexibility in applications where a standard bore or taper lock sprocket isn’t suitable.

Key Advantages

• Supplied with oversized (pilot) bore for custom machining
• Strong, accurately machined teeth for perfect chain engagement
• Available in steel and stainless steel for corrosion resistance
• Multiple sizes, materials, and tooth counts—including 9 tooth sprockets
• Ideal for low, medium, and heavy-duty power transmission systems

Applications of Pilot Bore Sprockets

Pilot bore sprockets are used widely across industries due to their adaptability and easy customisation.

Common applications include:

• Packaging & processing equipment
• Conveyors & material handling systems
• Agricultural machinery
• Automotive and mechanical drives
• Bicycles, motorcycles & light vehicles
• Industrial machinery & plant equipment
• Robotics & automation systems

Their ability to be machined to any shaft size makes them suitable for almost any chain-drive system.

Available Options: Steel & Stainless Steel Sprockets

We stock sprockets in multiple materials, including:

Standard Steel Sprockets

• Ideal for general industrial use
• Strong and cost-effective
• Excellent wear resistance

Stainless Steel Roller Chain Sprockets 

• Superior corrosion resistance
• Suitable for food processing, chemical plants, marine environments
• Long-lasting even in wash-down or humid conditions

Why Choose Pilot Bore Sprockets from BEP Ltd?

• Wide selection of 3/8" pitch sprockets for all chain drives
• Over 300 sprocket variations available in stock
• Options for 9 tooth sprockets and large-diameter sprockets
• High-quality materials for long-lasting performance
• Competitive pricing with bulk-order discounts
• Fast UK dispatch and reliable customer support

We make selecting the correct sprocket easy with clear sizing, chain pitch options, and expert guidance.

How to Select the Right Pilot Bore Sprocket

Choosing the correct sprocket ensures optimal chain performance and extended component life.

1. Match the Chain Pitch

For this collection:
Chain Pitch = 3/8" (ANSI 35 / 06B)

2. Choose Tooth Count

• Lower tooth counts (e.g., 9 tooth sprocket) provide higher torque
• Higher tooth counts provide smoother operation and reduced wear

3. Select Material

• Steel → general applications
• Stainless steel → corrosive or hygienic environments

4. Machine the Bore to Your Shaft Size

Pilot bore sprockets allow customisation of:

• Bore diameter
• Keyway
• Set screw holes

5. Confirm Hub Configuration

Select from various hub styles depending on shaft support and mounting requirements.

Pilot Bore Sprocket Reference Table

Frequently Asked Questions (FAQs)

1. What is a pilot bore sprocket?

A sprocket supplied with an oversized bore that allows machining to any required shaft size, offering maximum flexibility.

2. Do you supply stainless steel roller chain sprockets?

Yes. We stock stainless steel sprockets ideal for corrosion-prone or hygienic industries.

3. Can I order a 9 tooth sprocket?

Absolutely—BEP Ltd offers 9 tooth sprockets and many additional tooth count variations.

4. Are pilot bore sprockets suitable for high-load applications?

Yes. When correctly machined and installed, they provide excellent durability and chain stability even under heavy loads.