A210491000122 High-strength washers for steel structures Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000122 High-strength washers for steel structures Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000122 is a high-strength gasket for steel structures, exclusively designed by Sany for heavy-duty steel structure connections in the SY1250H mining excavator. This model operates under heavy loads and experiences severe vibrations. The connection points between the screws and the split flanges and the main pump connection body need to withstand high pressure and strong impacts, placing extremely high demands on the gasket’s pressure resistance, wear resistance, and anti-loosening effect. It integrates the core characteristics of high-strength pressure-bearing material, precision dimensional accuracy, anti-vibration and anti-loosening structure, corrosion resistance, wear resistance and oil resistance, and complies with national and industry standards such as GB/T 1230-2006 “High-strength Washers for Steel Structures”, GB/T 97.1-2002 “Flat Washers Class A”, and GB/T 3632-2008 “Torsion-shear type high-strength bolt connection pairs for steel structures” [1][6]. It is equipped with A210204000454 screws, B210780000693 split flanges, SSY007338266 main pump connection body and pump room pipeline connection parts. It is suitable for open-pit coal mines and metal mines. It can avoid connection failures caused by scratches on the connection surface, loose screws and uneven pressure. It is a key original auxiliary fastening accessory for mines to ensure continuous and safe operation of the whole machine.

Core technical parameters

Model: A210491000122
Main body material: 45# carbon steel or 304 stainless steel are both available.
Operating temperature: -30℃ to 150℃, suitable for open-pit mines with large temperature differences between day and night and high-temperature working environments of hydraulic systems.
Key operating parameters: Compatible with M12-M28 screws (fitting SY1250H screws and flange connection dimensions), inner diameter 12.5-28.5mm, outer diameter 24-50mm, thickness 2-4mm, dimensional tolerance ±0.02mm; bearing capacity ≥1040MPa, perfectly matching A210204000454 10.9 grade screws, capable of withstanding screw tightening torques of 75-350N·m; employs precision stamping and grinding forming process, surface roughness Ra≤0.4μm, service life ≥8000 working hours, salt spray resistance ≥1500 hours.
Structural Design: Employs a standard flat washer structure with rounded edges; the surface features fine, non-slip texture; the washer boasts extremely high flatness.
Shape and Dimensions: Standard round flat gasket structure, regular shape, no burrs, cracks, or deformation. Dimensions are precisely compatible with SY1250H A210204000454 screws, B210780000693 split flanges, and main pump connectors. Inner diameter, outer diameter, and thickness are customized according to original factory assembly standards. Mounting holes are precise, allowing for direct replacement with original factory parts.
Surface treatment: Carbon steel models use a double protection process of phosphating and Dacromet coating; stainless steel models use a double treatment of mechanical polishing and passivation.

Core functions and roles

As a “high-strength fastening auxiliary core component” of the SY1250H, its core function is to work with high-strength screws and split flanges to disperse the screw tightening preload, avoid damage to components caused by localized stress concentration, protect the connection surface from scratches, and enhance the friction and vibration resistance of the connection, thereby improving the stability of the overall steel structure connection. It can prevent hydraulic system failures and sudden equipment shutdowns caused by scratches on the connection surface, gasket deformation, and screw loosening, extend the service life of core components such as screws, split flanges, and main pump connectors, reduce maintenance costs, and work in conjunction with screws, main pump connectors, and split flanges to form a comprehensive fastening and protection system. It is a key high-strength auxiliary fastening component for ensuring stable and efficient mining operations and an essential part of friction-type high-strength bolt connections in steel structures.

Applicable Scenarios

Widely used in the steel structure connection parts of the SY1250H machine, it is compatible with A210204000454 screws, B210780000693 split flanges, SSY007338266 main pump connection body and pump room pipeline connection. It serves to distribute preload, protect connection surfaces, resist vibration and loosening, and provide wear and corrosion resistance. It can also be used in large-scale mining excavator steel structure connections of the same specifications. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthmoving projects, it is an essential high-strength auxiliary fastening accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce downtime costs caused by component wear and connection failure, improve the stability of the overall steel structure connection, and meet the stringent requirements of heavy-duty connections in mining machinery.

Get a personalized quote now

6 A210491000122 High-strength washers for steel structures
8 A210111000362 Bolts
9 60129702 Air Filter
10 24000632 Washer
11 60249819 Screws
57 10077549 M20-Internal G1/4ED Connector

*For other spare parts procurement needs, please contact us!