The 380901087 Clamping Plate is a genuine OEM heavy‑duty component manufactured by XCMG for motor graders and construction equipment. This precision‑machined clamping plate securely holds cutting edges (blades) to the moldboard, ensuring stable mounting and even wear distribution on XCMG GR series graders.
Engineered from high‑strength carbon steel with a corrosion‑resistant zinc‑plated finish, the 380901087 clamping plate withstands extreme impact loads, vibration, and abrasion from contact with gravel, asphalt, and frozen ground. It directly replaces cracked, warped, or worn clamping plates in blade retention systems.
Each unit is precision machined to exact thickness and hole pattern tolerances, with deburred edges and accurately positioned bolt holes. The clamping plate ensures uniform clamping force across the entire blade length, preventing blade loosening and reducing cutting edge wear.
| Parameter | Specification |
|---|---|
| OEM Number | 380901087 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Blade Clamping Plate / Cutting Edge Retainer |
| Material | High‑strength carbon steel (C45 / 1045), heat treated |
| Surface Finish | Zinc plating + yellow chromate (500h salt spray) |
| Overall Length | 180 mm (±0.5 mm) |
| Overall Width | 60 mm (±0.5 mm) |
| Thickness | 12 mm (±0.1 mm) |
| Bolt Hole Pattern | 4 holes, M16 diameter, 140 mm × 40 mm spacing |
| Hardness (Rockwell) | HRC 25‑30 (through hardened) |
| Flatness of Clamping Face | ≤ 0.1 mm |
| Compressive Strength | > 600 MPa (87,000 psi) |
| Edge Finish | Deburred, chamfered 1.0 mm × 45° |
| Operating Temperature Range | -40°C to +120°C |
| Weight (each) | 0.85 kg (1.87 lbs) |
| Corrosion Resistance | 500+ hours salt spray (ASTM B117) without red rust |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380901001, 380901045, 380901072 |
| Certifications | ISO 9001:2015, ISO 14001, CE |
The XCMG 380901087 Clamping Plate is a key component in the blade mounting system of motor graders. It sits directly against the top surface of the cutting edge (blade) and is secured by bolts that pass through both the clamping plate and the blade into the moldboard. This design distributes clamping force evenly along the entire blade length, preventing the blade from shifting or loosening during grading operations.
A properly functioning clamping plate ensures that the blade stays perpendicular to the moldboard and maintains the correct cutting angle. If the clamping plate becomes warped, cracked, or corroded, the blade can vibrate, leading to uneven wear, reduced grading accuracy, and increased fuel consumption. The 380901087 restores factory clamping force and blade stability.
The plate is designed to be reused multiple times, but after several blade changes or after being subjected to severe impacts, it may develop cracks or lose flatness. Replacing a worn clamping plate with a genuine XCMG part is essential for maintaining proper blade retention and extending cutting edge life.
Each 380901087 clamping plate is produced from heat‑treated C45 carbon steel plate. The plate is flame‑cut or laser‑cut to rough shape, then surface ground on both sides to achieve a flatness of ≤0.1 mm. The bolt holes are drilled and reamed to 16.2 mm diameter with a positional tolerance of ±0.2 mm, ensuring alignment with the moldboard holes.
After machining, the plates are through‑hardened to HRC 25‑30, then tempered to relieve internal stresses. The hardness is verified on a Rockwell tester for each batch. Finally, the plates are zinc plated with yellow chromate, providing 500+ hours of salt spray resistance per ASTM B117. All edges are chamfered to eliminate sharp corners that could cut operator gloves or damage the blade.
XCMG subjects each batch to a proof load test: the plate is clamped with 50 kN of force to simulate bolt preload, then inspected for deformation. Plates that show any permanent set are rejected. This ensures the 380901087 will maintain flatness under real‑world operating conditions.
Replacing a clamping plate is straightforward. Remove the old blade and clean the moldboard face thoroughly. Position the new 380901087 plate on top of the cutting edge, aligning the bolt holes. Insert M16 bolts (grade 10.9, not included) and torque to the specification in the service manual (typically 250 Nm). Use a cross pattern to ensure even clamping.
Never reuse old bolts, as they may have stretched. Apply a thin film of anti‑seize to the bolt threads to prevent galling and corrosion. After torquing, verify that the blade is firmly seated against the moldboard and that there are no gaps. Re‑check torque after the first hour of operation.
If the clamping plate becomes loose over time, inspect it for warpage or cracks. The 380901087 should remain flat under normal loads; any loosening indicates bolt stretch or thread damage.
Aftermarket clamping plates are often made from low‑grade steel that is not heat‑treated, leading to warpage under bolt preload. The genuine XCMG plate is through‑hardened to HRC 25‑30, providing long‑term flatness and fatigue resistance. Aftermarket plates may also have incorrect hole spacing, requiring drilling that weakens the plate.
Counterfeit plates often lack proper corrosion protection, leading to rust that transfers to the blade and moldboard. The 380901087 features zinc plating with yellow chromate, providing over 500 hours of salt spray resistance. Additionally, genuine plates have chamfered edges that reduce stress concentrations; many aftermarket plates have sharp corners that can crack under load.
XCMG provides a 12‑month warranty against manufacturing defects. Each plate is stamped with the XCMG logo and part number. This supersedes older numbers 380901001 and 380901045, with improved flatness and corrosion resistance.
Common indicators that a clamping plate needs replacement: visible cracking, warpage (use a straightedge across the clamping face), severe rust pitting, or elongated bolt holes. Also, if the blade loosens during operation even after torquing, the clamping plate may be deformed.
Preventive replacement every 3,000 operating hours or after every 5 blade changes is recommended. The cost of a genuine clamping plate is minimal compared to the cost of a broken blade, damaged moldboard, or a lost cutting edge that can cause a safety hazard.
When replacing blades, always inspect the clamping plate for wear. Keep a stock of 380901087 plates in your parts inventory for rapid replacement.
The 380901087 Clamping Plate is stocked in XCMG regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent repairs.
Bulk orders (10+ plates) receive volume discounts and can be shipped via sea freight. Each plate is individually wrapped in anti‑corrosion paper and boxed. For large fleets, consignment stock programs are available to ensure immediate availability.
Don’t let a worn or warped clamping plate compromise blade retention. Order the genuine XCMG 380901087 Clamping Plate today and ensure your grader’s cutting edge stays secure and productive.
The 380901087 Clamping Plate is a testament to XCMG’s attention to detail in blade mounting systems. While often overlooked, it is a critical safety and performance component. Keep spare plates in your service truck for every blade change, and always replace with genuine XCMG parts.
Upgrade your motor grader’s blade retention with the XCMG genuine clamping plate. Engineered for flatness, strength, and corrosion resistance – order now and experience the quality that keeps your grader cutting true.
