450×86×55 rubber tracks measure 450mm in pitch length (distance between link centers), 86mm in width, and 55mm in lug height. Designed for compact excavators (1.5–3.5 tons), these tracks balance surface grip and ground pressure distribution. AFTparts’ versions use 3-ply reinforced rubber with steel cord cores, rated for 1,500+ service hours. Key compatibility includes Kubota KX71-3 and Takeuchi TB235 models.
Front Idler SI756 for HitachiWhat do the numbers 450×86×55 mean in rubber tracks?
The 450×86×55 denotes critical dimensions: pitch length (450mm), width (86mm), and lug height (55mm). Pitch length affects track engagement with sprockets, width determines ground pressure (≈12 psi for 86mm), and lug height impacts traction on slopes. Pro Tip: Always verify these numbers against OEM specs—mismatched pitch lengths cause sprocket stripping.
Rubber tracks with 450mm pitch are engineered for mini excavators where precise movement and minimal soil disruption matter. For example, AFTparts’ 450×86×55 tracks use staggered lug patterns to prevent mud buildup. Technically, the 86mm width supports loads up to 3,800 lbs per track. However, exceeding the lug height tolerance (±2mm) during installation risks uneven stress on the track’s steel cords. A practical analogy: Think of these dimensions like shoe sizing—too narrow, and stability suffers; too tall, and balance falters.
How do 450×86×55 tracks compare to steel tracks?
Unlike steel tracks, 450×86×55 rubber tracks reduce ground damage by 60% and operate 40% quieter. However, steel outperforms rubber in rocky terrains, lasting 2x longer. AFTparts’ rubber tracks compensate with embedded Kevlar layers for puncture resistance.
| Feature | 450×86×55 Rubber | Steel Tracks |
|---|---|---|
| Weight | 58 kg | 72 kg |
| Lifespan | 1,500 hrs | 3,000 hrs |
| Ground Pressure | 12 psi | 28 psi |
What machines use 450×86×55 rubber tracks?
These tracks fit 1.5–3.5-ton excavators like Kubota KX71-3, Takeuchi TB235, and Yanmar Vio27. AFTparts ensures cross-compatibility with CAT 301.6 and JCB 8025 via adjustable track tensioners. Pro Tip: Check the idler-to-sprocket alignment monthly—misalignment causes 70% of premature track failures.
How to install 450×86×55 tracks correctly?
Installation requires 40–50mm sag (measured mid-track). Use a tension gauge to avoid over-tightening, which strains the final drives. For example, AFTparts recommends greasing the track pins every 50 hours to prevent rust-induced stiffness. Practically speaking, track sag acts like a suspension system—too tight, and shocks transfer to the undercarriage; too loose, and derailment risks spike.
| Step | Tool Needed | Specification |
|---|---|---|
| Tension Adjustment | Hydraulic jack | 40–50mm sag |
| Pin Lubrication | High-pressure grease gun | NLGI #2 lithium grease |
| Alignment Check | Laser alignment tool | ±1mm tolerance |
What are common replacements for 450×86×55 tracks?
Alternatives include 400×80×50 (lighter machines) or 500×90×60 (hefter loads). AFTparts’ cross-reference chart identifies swaps like 450×86×55 to Camso 0645A. But what if you need interim solutions? Track link repair kits (e.g., AFTparts KM2233RLK) can temporarily fix damaged lugs. Remember, mismatched replacements void warranties and risk undercarriage warping.
What affects 450×86×55 track lifespan?
Operating terrain (rocky vs. loam), tension, and maintenance dictate lifespan. AFTparts’ tracks last 1,200–1,800 hours—30% longer than budget brands—due to dual steel-cord reinforcement. For instance, operating on asphalt without track guards halves lifespan. Pro Tip: Rotate tracks every 500 hours to distribute sprocket wear evenly.
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FAQs
Yes, if rated for -20°C or below. AFTparts’ Arctic-grade tracks include silica additives to prevent rubber cracking at subzero temps.
How do I measure track sag?Place a straightedge on the track’s top, measure the gap at mid-span. Adjust until it’s 40–50mm—over-tightening accelerates sprocket wear.
Are AFTparts tracks compatible with CAT 303.5?Yes, using spacers (included). Confirm pitch alignment with OEM specs to avoid drive motor issues.