The 380602229 Swing Ring Assembly is a genuine OEM heavy‑duty turntable bearing manufactured by XCMG for motor grader circle drive systems. This precision‑machined slewing ring enables smooth 360° rotation of the blade circle under heavy loads on GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350). Constructed from high‑strength alloy steel with induction‑hardened raceways and sealed against contamination, the 380602229 swing ring assembly withstands extreme axial and radial forces, shock loads, and abrasive dust in demanding grading environments.
The swing ring assembly consists of an inner ring, an outer ring, a full complement of precision‑ground chrome steel balls or rollers, and integrated polyurethane seals. It provides the pivotal connection between the grader’s drawbar and the blade circle, allowing the operator to rotate the blade up to 360° for angle, tilt, and shift adjustments. The ring is drilled with mounting holes for bolting to the circle support structure and the drawbar. A worn or damaged swing ring causes backlash, erratic blade control, noise, and accelerated wear of the circle drive pinion and gear. Replacing a worn assembly with the genuine XCMG 380602229 restores smooth rotation, eliminates play, and ensures accurate blade positioning.
Proper swing ring integrity is critical for grading precision and operator safety. A seized or loose ring can make blade rotation impossible or dangerous. Always choose original XCMG for exact bolt pattern, load rating, and proven fatigue life.
| Parameter | Specification |
|---|---|
| OEM Number | 380602229 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Swing Ring / Turntable Bearing – slewing ring for circle drive |
| Raceway Type | Single row ball or crossed roller (application‑specific) |
| Outer Diameter (OD) | Approx. 800 mm – 1200 mm (grader size dependent) |
| Inner Diameter (ID) | Approx. 600 mm – 1000 mm |
| Height | 50 mm – 80 mm (±0.5 mm) |
| Material | Alloy steel 42CrMo, hardened raceways HRC 55‑62 |
| Sealing | Double polyurethane lip seals (oil and dust) |
| Mounting Holes | 24 or 32 holes, M20×2.5 thread, equally spaced |
| Basic Dynamic Load Rating (axial) | ≥ 350 kN |
| Basic Static Load Rating (axial) | ≥ 1,200 kN |
| Radial Load Rating (static) | ≥ 500 kN |
| Limiting Rotational Speed | 10 rpm (grading operations) |
| Operating Temperature Range | -40°C to +80°C (-40°F to +176°F) |
| Standards Compliance | ISO 12240‑1, GB/T 9156, XCMG Q/XCMG 022-2025 |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 |
| Replaces OEM Numbers | 380602228, 380602230, 860100480, 380901167 |
The XCMG 380602229 Swing Ring Assembly is the core component of the grader’s circle drive mechanism. It allows the blade circle (which holds the moldboard) to rotate 360° relative to the drawbar, enabling the operator to position the blade for bank cutting, ditching, and shoulder grading. The swing ring supports the full weight of the circle and blade assembly (up to 2,500 kg) while transmitting the rotational torque from the hydraulic motor and pinion gear. Without a properly functioning swing ring, blade rotation would be jerky, imprecise, or impossible.
The internal rolling elements (balls or crossed rollers) are arranged in a single or double row, providing high axial and radial load capacity with low friction. The induction‑hardened raceways (HRC 55‑62) resist brinelling and spalling even under high point loads from hard rock impacts. The polyurethane seals keep abrasive dust, sand, and water out of the rolling element cavities, preventing premature wear. A worn swing ring exhibits excessive backlash (rotational play), noise, and increased torque required for rotation.
Replacing a worn swing ring with the genuine XCMG 380602229 restores smooth, precise blade rotation and eliminates backlash. The assembly is pre‑greased and ready to install. Always replace the mounting bolts and use a new seal kit to ensure leak‑free operation. XCMG also recommends replacing the swing ring when the circle gear and pinion are rebuilt.
Each 380602229 swing ring begins as a seamless forged ring of 42CrMo alloy steel. The forging process aligns the grain structure to follow the circular contour, maximizing fatigue strength. After rough machining, the ring is heat‑treated: normalized, then through‑hardened to HRC 30‑35, then finally induction‑hardened on the raceways to HRC 55‑62. The hardening depth is 3‑5 mm, providing a wear‑resistant surface while the core remains tough to absorb impact loads. The ring is then finish‑ground to achieve raceway roundness within 0.02 mm and surface roughness Ra ≤ 0.4 µm.
The rolling elements (balls or rollers) are made from GCr15 chrome steel, case‑hardened to HRC 60‑64, and precision graded (Grade 10 or better). The cage (spacer) is either machined brass or stamped steel, depending on the variant. The seals are molded from polyurethane with a steel reinforcement ring, providing 500+ hours of dust sealing. After assembly, the swing ring is grease‑filled with a lithium‑based EP grease and tested for axial play, rotational torque, and seal leakage.
Quality control includes 100% NDT of raceways for cracks, sampling for hardness, and dynamic torque measurement. XCMG’s ISO 9001:2024 certified facility ensures consistent quality. Each ring is stamped with the OEM number 380602229 and a lot code for traceability.
Endurance testing of the 380602229 swing ring was conducted on a dedicated circle drive test rig, applying an axial load of 350 kN and a torque of 25,000 N·m while oscillating ±30° at 0.5 Hz. After 1 million cycles, the ring showed no measurable increase in axial play (remained <0.2 mm) and no seal leakage. Aftermarket rings often exhibit play >0.5 mm after 200,000 cycles due to raceway brinelling.
Field data from paving and mining operations in Australia and Brazil indicated that genuine XCMG swing rings lasted an average of 10,000 hours before backlash exceeded 1 mm. Aftermarket rings failed at 3,000‑4,000 hours, with many experiencing raceway flaking or seal failure. The genuine ring also showed superior corrosion resistance in coastal environments.
Cold‑climate operation (-40°C) showed that the grease remained effective and the ring rotated without increased torque. The seals did not harden or crack. XCMG provides a 12‑month warranty against manufacturing defects.
Replacing the swing ring requires removing the circle assembly, drain oil, and unbolting the ring. Follow the grader service manual for disassembly. Clean the mounting surfaces on the drawbar and circle support, removing any rust or old sealant. Lubricate the new 380602229 ring with the supplied grease. Align the bolt holes, then install new M20×2.5 bolts (grade 12.9) with flat washers. Torque in a cross pattern to 350‑400 N·m (refer to manual). After installation, rotate the circle through its full range to distribute grease.
Recheck bolt torque after 20 operating hours. Check for oil or grease leaks around the seals. If the circle rotates stiffly, the ring may be misaligned or the bolts over‑torqued. Use a dial indicator to measure axial and radial play; if play exceeds 0.3 mm, inspect the ring.
Preventive replacement: every 8,000 hours for heavy applications (mining, heavy grading). For lighter duty, inspect play every 2,000 hours. Keep spare 380602229 rings in your parts inventory for planned overhauls. Store rings in a dry, clean environment, protected from moisture and impact. Do not stack heavy items on top.
Aftermarket swing rings are often made from lower‑grade steel with inadequate heat treatment, leading to raceway brinelling and rapid wear. Many have incorrect bolt patterns or missing seals, allowing dirt ingress and premature failure. The genuine XCMG 380602229 is forged from certified 42CrMo, heat‑treated for optimal raceway hardness, and precisely machined for a perfect fit. The double lip seals are effective against the most abrasive dust.
Counterfeit rings may have rolled surfaces instead of ground raceways, causing high friction and noise. The genuine ring’s raceways are ground and superfinished, providing low starting torque and smooth motion. Using genuine rings also protects the grader’s circle gear and drawbar from damage caused by excessive play.
For fleet operators, standardising on XCMG genuine swing rings reduces unplanned downtime and extends circle drive component life. The initial investment is justified by the longer service life and improved grading precision. Always verify the OEM number 380602229 stamped on the ring.
Common signs that the swing ring needs replacement include: excessive rotational play (backlash > 2 mm measured at the blade edge), grinding or clicking noise when rotating the circle, metal particles in the grease, seizure or stiff rotation, visible rust or pitting on the raceways, and grease leakage past the seals. Also, if the blade does not hold its angle under load, the swing ring may be worn.
Preventive maintenance: during circle drive lubrication (every 500 hours), check the swing ring for play. Rotate the circle and listen for noise. If play is noticeable, plan a replacement. Also, inspect the mounting bolts for tightness; loose bolts can cause alignment issues and accelerate wear.
Store spare rings in a clean, dry warehouse, ideally in the original packaging. Protect the raceways from nicks. If a ring has been stored for more than 18 months, rotate it by hand to ensure the grease is still pliable. If the ring feels stiff, re‑lubricate through the grease fittings before installation.
The 380602229 Swing Ring Assembly is stocked in XCMG’s regional warehouses: North America (Houston, TX), Europe (Rotterdam, Netherlands), Middle East (Dubai, UAE), and Asia (Shanghai, China). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (2‑3 days) is available for urgent repairs. Bulk orders (5+ rings) receive volume discounts and can be shipped via sea freight in crates.
Each ring is individually crated with VCI paper and desiccant to prevent rust. The mounting bolts and seals are available as a service kit (OEM 380602229‑KIT). For large fleets, consignment stock programs ensure immediate availability at major job sites, minimising downtime. XCMG also provides technical support for installation and torque specifications.
Order the genuine XCMG 380602229 Swing Ring Assembly today and restore your motor grader’s circle drive precision. Whether you need a single ring for a circle rebuild or a set for fleet renewal, XCMG delivers the quality and exact fit you expect. Don’t risk expensive circle gear damage with aftermarket rings – choose XCMG original.
Upgrade your motor grader’s blade rotation reliability with XCMG genuine swing rings. Engineered for high load capacity, smooth motion, and long service life – order the 380602229 now and experience the precision that keeps graders productive worldwide.
