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  5. 19 tooth 40 Pitch Idler Sprocket
19 tooth 40 Pitch Idler Sprocket
19 tooth 40 Pitch Idler Sprocket
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19 tooth 40 Pitch Idler Sprocket

Part Number: 2187-40
Online Price: $19.99
19-Tooth Chain Tensioner Sprocket for #40 Chain – Ball Bearing & Bronze Bushing
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Availability: In Stock.

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Description

19-Tooth Chain Tensioner Sprocket for #40 Chain – With Ball Bearing & Bronze Bushing


The 19-tooth chain tensioner sprocket is engineered for use with #40 roller chains, offering a reliable solution for maintaining chain alignment and reducing slack in your drivetrain system. Whether you're running a go-kart, mini bike, or other chain-driven machinery, this tensioner sprocket helps improve chain stability and performance—especially in setups with longer chains or when the engine is not under constant load.


Key Features:

  • Compatible with #40 chains
  • 19-tooth steel sprocket ensures smooth chain engagement
  • Ball bearing center allows for smooth and low-friction rotation
  • Bronze step-down bushing fits standard 5/8-inch bolts
  • Helps reduce chain slack, deflection, and stretch during acceleration
  • Ideal for custom builds or as a replacement in chain tensioner assemblies


Benefits:

  • Improves chain alignment and reduces premature wear
  • Reduces vibration and chain whip on high-torque applications
  • Increases drivetrain reliability and extends chain life
  • Easy to install on tensioner arms or custom brackets


Whether you're fine-tuning a race setup or upgrading a utility build, the 19-Tooth #40 Chain Tensioner Sprocket offers smooth, reliable chain guidance to keep your system running at peak performance.

FAQ

Q1: What size chain is this tensioner sprocket compatible with?

A: This sprocket is specifically designed for use with #40 roller chains.


Q2: How many teeth does the sprocket have?

A: It features 19 teeth, which offers a smooth and controlled engagement with the chain.


Q3: What size bolt does the bushing fit?

A: The included bronze step-down bushing is sized to fit a 5/8-inch bolt, making installation easy on most tensioner arms or brackets.


Q4: Does the sprocket spin freely?

A: Yes, it includes a ball bearing center that allows for low-friction, smooth rotation, helping reduce chain wear and vibration.


Q5: When should I use a chain tensioner sprocket like this?

A: Use it when you're working with longer chain lengths, custom drivetrains, or need to reduce chain slack and deflection in high-acceleration applications like go-karts, mini bikes, or small utility vehicles.

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