Idler Sprockets – Chain Tensioning and Alignment Solutions

Bolton Engineering Products Ltd supplies a complete range of idler sprockets designed to enhance chain performance, minimize wear, and keep proper tension in roller chain systems. 

Our idler sprockets with bearings are developed to ANSI standards and provide a precise fit and long-term reliability for a variety of industrial, agricultural, and mechanical uses. Whether you require a fixed idler sprocket or a chain idler sprocket on a tensioning arm, BEP Ltd has a solution in stock.

What Is an Idler Sprocket?

An idler sprocket (also known as an idler wheel) is a hubless sprocket fitted with a sealed ball bearing, allowing it to rotate freely around a fixed shaft or tension arm.
Its main function is to guide, tension, and maintain alignment in roller chain systems — particularly when chain length, routing, or load variation causes slack.

Common Uses Include:

• Reducing chain vibration and noise
• Maintaining correct chain engagement with drive and driven sprockets
• Routing chains around obstructions or corners
• Compensating for chain stretch over time

Technical Specifications

Key Features & Benefits

• Sealed Bearings: High-Quality Sealed Ball Bearings are used for every sprocket. 
• Hardened Teeth: Heat actively and precisely machined for extended component life. 
• Flexible Installation: Compatible with Fixed shaft or Tensioned Arm installation.
• Standard Compatibility: Suitable for every ANSI standard roller chain pitch, so it can be easily replaced
• Improved Chain Life: Enhances chain life by reducing chain vibration, wear, and elongation

Why Choose Bolton Engineering Products Ltd?

As a leading UK supplier and idler sprocket stockist, BEP Ltd offers:

• Large UK stock of idler sprockets with bearings in multiple chain pitches
• Same-day dispatch on in-stock items
• Expert technical support for sizing and compatibility
• Competitive pricing and dependable aftersales service
• Options for engineer class idler sprockets and stainless-steel variants

Trust Bolton Engineering Products Ltd to deliver precision, reliability, and long-lasting performance in every idler sprocket you buy.

FAQs

Q1: What is an idler sprocket used for?

An idler sprocket is used to maintain chain tension, alignment, and engagement in a roller chain system. It helps prevent slack, vibration, and uneven wear.

Q2: What’s the distinction between a chain idler sprocket and a drive sprocket?

These sprockets don’t run torque like drive sprockets; the equipment rotates free-flowing on and on a bearing.

Q3: Do idler sprockets come with bearings?

Yes. BEP Ltd’s idler sprockets with bearings feature high-quality, sealed ball bearings that require no maintenance.

Q4: Can I use an idler sprocket for high-speed applications?

Yes, as long as the bearing and chain pitch are rated for the required speed and load. We supply heavy-duty and high-speed compatible models.