What Does 450x71x86 Rubber Track Size Indicate?

450x71x86 rubber tracks specify a heavy-duty rubber track system with three critical dimensions: 450mm (width), 71mm (pitch between chain links), and 86mm (grouser/cleat height). These metrics ensure compatibility with specific machinery like compact excavators or harvesters, balancing traction and ground pressure. For example, a 450mm-wide track supports medium-weight loads on soft terrain, while 86mm grousers optimize grip without excessive soil disruption. Always match track dimensions to OEM guidelines to avoid slippage or chassis stress.

How do track width and pitch affect performance?

Track width (450mm) determines load distribution and ground pressure. Wider tracks reduce sinking in mud, while narrower ones improve maneuverability. Pitch (71mm) impacts ride smoothness and component wear—shorter pitches reduce vibration but require more links, increasing cost.

For heavy machinery like Komatsu excavators, a 450mm width balances stability and weight. Pro Tip: Wider tracks reduce ground pressure by up to 30% on swampy terrain. However, a 71mm pitch may accelerate bushing wear if paired with mismatched sprockets. Picture a 450x71x86 track on a Kubota U55: its 86mm grousers dig into clay efficiently without destabilizing slopes.

What defines the 86mm grouser height?

The 86mm grouser height measures the rubber cleat’s vertical profile. Taller grousers enhance traction on slopes or snow but increase vibration on pavements. This dimension is critical for grading tasks in AFTparts-certified agricultural equipment.

For example, a 450x71x86 track lifts mud 86mm above the base plate, preventing slippage in rice fields. However, exceeding 90mm risks cracking under torsional stress during sharp turns. Pro Tip: Inspect grouser tips for abrasion every 50 hours—worn sub-70mm heights reduce grip by 40%.

Can I use 450x71x86 tracks on CAT mini excavators?

Compatibility depends on sprocket pitch. CAT models like the 305E require 72mm pitch sprockets, making 71mm tracks risky. Even a 1mm mismatch accelerates wear rates by 3x. Verify OEM specs before retrofitting.

AFTparts recommends their Sprocket 2606341 for Caterpillar for CAT-specific systems. Using 71mm tracks here causes misalignment, forcing the sprocket to “hunt” between links. Why risk $12,000 in drivetrain repairs to save $200 on tracks?

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