Restore smooth, play-free bucket articulation on your Cat excavator with our Heavy-Duty Bucket Pin, a precision-engineered aftermarket replacement designed for the most heavily loaded pivot point in your excavator’s front linkage. The bucket pin serves as the critical connection between the bucket and the stick (dipper arm) — absorbing extreme digging forces, repeated shock loads, and continuous articulation in demanding construction, quarrying, and mining operations . A worn or elongated pin leads to bucket slop, accelerated bushing and linkage wear, and costly downtime. Our bucket pin is built to prevent exactly that.
Brand Compatibility Notice: Our bucket pins are high-quality aftermarket replacement parts intended for use on Caterpillar machinery. The Caterpillar brand name is used solely as reference information to indicate compatibility and does not imply that our products are Caterpillar OEM .
Key Specifications:
- Application: Bucket-to-stick main pivot; also available for boom-to-link, link-to-bucket, and arm-to-bucket hinge points
- Material: 40Cr / 45# high-strength alloy steel; 50MnB available for heavy-duty configurations
- Surface Hardness: HRC 52–58 (induction-hardened bearing surfaces; up to HRC 58–62 with advanced heat treatment)
- Core Hardness: HRC 45–55 (quenched & tempered for impact toughness)
- Hardened Depth: 10–12 mm uniform case depth on bearing surfaces for extended wear life
- Manufacturing Process: Raw steel cutting → CNC turning & groove machining → quenching & tempering heat treatment → deep induction hardening → precision grinding → polishing → anti-rust coating
- Dimensional Tolerance: Precision-ground diameters to ±0.02 mm for perfect bushing fit
- Optional Features: Spiral grease grooves, cross-drilled lubrication passages, end holes, retainer ring slots, thick hard-chrome plating
- Surface Treatment: Phosphate, blackening, or anti-rust oil coating
- Certification: ISO 9001:2000
- Inspection: 100% tested before delivery — size, roundness, and hardness checked
- OEM/ODM: Available; we produce by your samples or technical drawings
- MOQ: 1 piece (sample orders welcome)
- Stock: Large inventory of popular sizes; custom sizes manufactured to order
- Production Capacity: 50,000+ pcs/month
Caterpillar Compatibility Reference:
Our bucket pins are precision-matched to OEM specifications for a wide range of Cat excavators, across multiple machine classes:
- Mini Excavators (1.5–8 ton): 301.5, 301.6, 301.8, 311, 312, 312C, 312D, 313, 314, 315 series
- Medium Excavators (20–36 ton): 320D, 320E, 323D, 323E, 323F, 324D, 325D, 326D, 329D, 330D, 330E, 336D, 330B, 330C, 345B, 345C
- Bucket Pin Assembly P/N References: 247-7631, 328-8776, 117-5435 (and many more)
- Available Dimensions: Pin diameters from 25 mm to 100+ mm; lengths from 77 mm to 500+ mm — matched to your exact machine specification
Why Choose Our Caterpillar Bucket Pins?
Tough Core + Hard Surface = Long-Life Pivot: Our bucket pins are forged from 40Cr alloy steel, then deep induction-hardened to HRC 52–58 with a 10–12 mm case depth . This metallurgical combination delivers an exceptionally wear-resistant bearing surface while maintaining a tough, high-toughness core that resists bending, shearing, and cracking under maximum bucket curl forces — exactly what the most heavily loaded pin in your front linkage demands .
- OEM-Exact Fitment: Precision-machined to Caterpillar’s original dimensions — diameter, length, groove position, and tolerance all matched to factory specs for direct, modification-free installation. No play, no slop, no premature bushing wear .
- Extreme Load Resistance: High shear and bending strength handles maximum breakout and curl forces; proven performance in high-hour excavator front-end rebuilds and major linkage rebuilds .
- Superior Wear Resistance: Induction-hardened bearing surfaces (HRC 52–58) resist abrasion and elongation under high-stress conditions, dramatically extending service life versus standard pins .
- Easy Maintenance: Integrated grease grooves and cross-drilled lubrication channels allow easy servicing and ensure consistent lubrication at the pivot point .
- 100% Quality Tested: Every pin undergoes comprehensive inspection — dimensional accuracy, roundness, surface finish, and hardness verification — before shipment .
- Factory-Direct Value: Source straight from our production line — genuine-level quality at a competitive aftermarket price, with no dealer markup. MOQ as low as 1 piece; bulk wholesale and mixed container loading welcome .
- Complete Customization: Provide your part number, sample, or technical drawing — we manufacture to your exact specification. Custom diameters, lengths, groove patterns, and surface treatments available. OEM/ODM branding supported .
- Also Available: We supply the full range of excavator pins — boom-to-link pins, rod-end pins, tub-end pins, linkage pins, and bucket tooth pins (J200/J225/J250/J300/J400 series) — plus matching bushings, retainers, and seals for a complete linkage overhaul .
Applications:
Designed for Caterpillar excavators operating in construction, quarrying, mining, demolition, road building, landscaping, and heavy earthmoving. Whether you’re performing routine bucket changes, scheduled linkage rebuilds, or emergency repairs, our bucket pins deliver the durability and precise fit your excavator’s front end depends on.
How to Order the Correct Bucket Pin:
⚠️ Critical Fitment Information: Excavator bucket pins have numerous OEM specifications, and even pins for the same model class can vary by serial number and configuration . To guarantee a perfect match, please provide ONE of the following:
- Your excavator’s model and serial number
- The existing pin’s part number (e.g., 247-7631, 328-8776, 117-5435)
- Pin diameter, overall length, and groove dimensions
- Photos of the installed pin and linkage
Our engineering team will verify the exact specification and confirm compatibility before production — no guesswork, no returns, no downtime.
Quality Assurance:
- ISO 9001:2000 certified manufacturing with rigorous QC at every stage
- Material verification — 40Cr / 45# / 50MnB alloy steel from top-tier mills
- Heat treatment control — quenching & tempering + deep induction hardening ensures HRC 52–58 surface hardness with 10–12 mm case depth
- 100% pre-shipment inspection — size, roundness, hardness, and surface finish verified
- Export-grade packaging — wooden box or pallet for safe worldwide transport
Ordering & Support:
- MOQ: 1 piece (sample orders welcome)
- Lead Time: 24–72 hours for in-stock standard sizes; 20–30 days for custom/bulk production
- Payment: T/T (30% deposit, 70% before shipment), L/C, Western Union
- Trade Terms: FOB Xiamen / Ningbo / Shanghai / Guangzhou; CIF available
- Shipping: By sea, air, or international courier worldwide
- Fitment Verification: Technical support available to confirm dimensions and ensure perfect part matching
Order Your Caterpillar Bucket Pin Today!
Don’t let a worn pivot pin compromise your excavator’s digging precision and linkage health. A failing bucket pin causes bucket slop, accelerates bushing and linkage wear, and leads to costly cascading failures. Contact us with your part number or machine details for a competitive factory-direct quote, or add to cart now. We respond to all inquiries within 24 hours and ship worldwide.
+86 1588 0208980
doozer@doozergroup.com
