The genuine XCMG 860119645 Cylindrical Roller is a precision‑ground rolling element manufactured for XCMG GR series motor graders. This OEM cylindrical roller is used in large‑diameter slewing bearings, final drive planetary gear sets, and heavy‑duty idler wheels, where it supports high radial loads and enables smooth rotation under extreme shock and vibration.
Manufactured from vacuum‑degassed chrome steel (SAE 52100) with a hardness of 60–64 HRC, the 860119645 cylindrical roller delivers exceptional rolling contact fatigue life, dimensional stability, and resistance to plastic deformation. The roller ends are precision‑crowned to prevent edge loading, and the surface is superfinished to Ra ≤0.05 μm for minimal friction and heat generation.
The 860119645 roller has a nominal diameter of 22 mm and a length of 45 mm (exact dimensions as per XCMG drawing). This roller is designed to operate in full‑complement or caged arrangements, providing high load capacity within a compact envelope. Typical applications on GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders include the circle rotation slewing ring, final drive planet pinions, and blade tilt pivot bearings.
A worn, spalled, or out‑of‑round cylindrical roller will cause increased vibration, noise, and eventual seizure of the slewing bearing or gearbox. Replacing a damaged roller with genuine XCMG 860119645 restores original rolling geometry, reduces friction, and extends the service life of the entire bearing assembly. Keep this precision roller in your parts inventory for circle drive or final drive overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860119645 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Precision Cylindrical Roller (Grade 3 / G3) |
| Nominal Diameter (d) | 22.00 mm (±0.0015 mm) |
| Nominal Length (L) | 45.00 mm (±0.025 mm) |
| Crowning (end relief) | 0.005–0.010 mm radius on both ends |
| Material | Vacuum degassed SAE 52100 chrome steel (GCR15) |
| Hardness | 60–64 HRC (uniform) |
| Surface Finish (Ra) | ≤0.05 μm (superfinished) |
| Grade (ISO 3290) | Grade 3 (G3) – high precision |
| Diameter Tolerance (grade 3) | ±0.0015 mm / ≤0.0015 mm variation |
| Length Tolerance | ±0.025 mm / ≤0.025 mm variation |
| Dynamic Load Capacity (per roller) | ≈12 kN (depending on raceway geometry) |
| Static Load Capacity (per roller) | ≈28 kN |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Corrosion Protection | Oil film (passivated) – optional coating |
| Standards Compliance | ISO 3290, DIN 5402, ABMA Std 10, XCMG Q/XCMG 1107-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860119600, 860119640, 860119644 |
The 860119645 cylindrical roller is a fundamental rolling element in large‑diameter slewing bearings that support the grader’s circle rotation. When the blade is angled, the roller set carries the entire load of the circle, transmitting forces from the blade to the mainframe.
In final drive planetaries, cylindrical rollers are used in the planet gear bearings to allow the planet gears to rotate freely while supporting high radial loads from the ring gear and sun gear. A single worn roller can cause the entire planetary stage to fail.
The line contact of cylindrical rollers provides a much higher load‑carrying capacity than ball bearings of the same size. The full complement of rollers (when used without a cage) maximizes load capacity, ideal for low‑speed, high‑load oscillating applications like circle rotation.
Replacing damaged rollers with genuine XCMG 860119645 restores original load distribution, reduces bearing play, and ensures smooth, precise blade control and wheel traction.
XCMG selects vacuum‑degassed SAE 52100 chrome steel to guarantee the complete absence of oxide inclusions that could initiate fatigue cracks under rolling contact stress.
The cylindrical roller is cold‑headed from wire stock, then ground and lapped to achieve a precise diameter tolerance of ±0.0015 mm and a surface finish Ra ≤0.05 µm. The ends are precision‑crowned to prevent edge loading, which significantly increases fatigue life under oscillating motion.
After grinding, the rollers are heat‑treated (austenitized, oil quenched, tempered) to a uniform hardness of 60–64 HRC with a martensitic microstructure. A secondary cryogenic treatment is applied to stabilise retained austenite, reducing dimensional change over time.
Each roller is 100% inspected for diameter, roundness, and surface defects using automated optical sorting machines. Random samples are tested for micro‑hardness and case depth. Genuine XCMG rollers exceed ISO grade 3 requirements, outperforming aftermarket rollers that typically meet only grade 10 or lower.
Before installing new rollers, inspect the inner and outer raceways for pitting, scoring, or brinelling. The raceways must be clean and free of debris, with a surface finish suitable for rolling contact.
When replacing a full complement of rollers in a slewing ring, measure the raceway diameter to ensure it is within tolerance. The radial clearance after roller installation should be 0.02–0.06 mm for most applications. If out of specification, adjust by changing the number of rollers or replace the race rings.
Apply a generous amount of EP2 grease to the raceways before inserting the rollers. Use a non‑metallic tool to position the rollers, taking care not to scratch the raceways. After assembly, rotate the bearing manually to check for smoothness – there should be no “notching” or binding.
Keep spare 860119645 rollers in your workshop for slewing bearing or planetary gearbox overhauls. A single damaged roller can ruin the entire raceway, so always replace all rollers when rebuilding a bearing.
Aftermarket cylindrical rollers are often made from lower‑grade bearing steel (e.g., 100Cr6 without vacuum degassing) leading to premature spalling and surface fatigue within 1,500 hours.
Many counterfeit rollers have inconsistent diameters (variation >0.005 mm), causing uneven load distribution, increased friction, and rapid failure of the raceway. Some lack proper crowning, resulting in edge loading and flaking of the roller ends.
The surface finish of aftermarket rollers is often Ra ≥0.1 μm, generating excessive friction and heat that degrades lubricant and accelerates wear. Genuine XCMG rollers are superfinished to Ra ≤0.05 μm, ensuring quiet, efficient operation.
XCMG provides a 12‑month warranty against manufacturing defects. Each roller is laser‑marked with a batch code for traceability (available on request). Using OEM rollers prevents premature bearing failure and avoids the labour cost of re‑opening the assembly. Choose genuine for reliability.
Audible signs: grinding or rumbling noise when rotating the circle or during final drive operation, with the noise increasing under load. Visual signs: metal flakes in the grease, visible flaking or spalling on the roller surface, and a rough feel when rolling the roller between fingers.
Preventive replacement is recommended every 4,000 operating hours for slewing ring bearings and every 5,000 hours for final drive planetaries. Even if the rollers look intact, microscopic fatigue cracks may be present. The cost of a new set of rollers is negligible compared to the labour of replacing the entire bearing assembly.
Keep a stock of 860119645 rollers in your fleet inventory. When rebuilding a slewing bearing or planetary gearbox, always replace all rollers – mixing new and old rollers will cause uneven load distribution and accelerate failure. Proactive replacement eliminates unpredictable downtime.
The XCMG 860119645 Cylindrical Roller is stocked in regional distribution centers: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide.
Expedited courier (DHL/FedEx) provides 1–2 day shipping for urgent slewing bearing repairs. Bulk orders of 500+ rollers receive volume discounts and can be shipped by sea freight. Each roller is individually separated in an anti‑corrosion tray or bag to prevent contact damage.
For large fleets, consignment stock programs ensure immediate availability. Our parts specialists can help calculate the required number of rollers for your specific bearing and provide installation guidance. Lot‑specific hardness and dimensional certificates are available upon request.
Don’t let a single worn cylindrical roller ruin your grader’s circle rotation or final drive. Order the genuine XCMG 860119645 Cylindrical Roller today and restore smooth, reliable rolling motion to your grader’s most critical bearings.
Upgrade your grader’s rolling element reliability with XCMG genuine cylindrical rollers. Engineered for high precision, fatigue resistance, and long service life. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader rotating with confidence – choose 860119645 OEM roller.
