21-23 Ton Slewing Ring for Excavator QND1220-32Z7

Overview

Designed to withstand extreme radial, axial, and overturning moment loads, this excavator swing bearing delivers stable, smooth rotational performance for upper excavator structures, even in harsh job site conditions including rocky excavation, urban demolition, and highway construction. Developed for construction machinery manufacturers, after-sales parts distributors, and large-scale infrastructure project contractors, this slewing ring meets strict industry standards for durability and interchangeability, minimizing equipment downtime and lowering long-term operating costs.

Technical Specifications & Dimensional Parameters

Key Features & Performance Advantages

Precision Machined Gear System

The integrated gear of the 21-23 ton excavator slewing ring is machined with custom tooling, which compensates for precision loss during pre-quenching and post-heat treatment processes. This ensures consistent gear meshing accuracy, reduces transmission noise, and extends the service life of the rotary drive system. Specialized equipment is used for standardized gear chamfering, eliminating burrs and reducing wear during long-term operation.

Enhanced Sealing & Structural Stability

Sealing strip joints adopt full vulcanization treatment, creating a tight barrier against dust, mud, and water ingress on construction sites, preventing internal lubricant leakage and reducing the risk of premature bearing failure. Strict deformation control throughout the manufacturing process ensures the slewing ring maintains dimensional stability under heavy loads, avoiding jamming and uneven wear during continuous operation.

Applications & Compatible Equipment

This heavy duty excavator slewing bearing is primarily designed for 21-23 ton crawler and wheeled excavators from mainstream global construction machinery brands. It is widely used in infrastructure construction, mining excavation, urban renewal, river dredging, and other medium-duty construction scenarios. It can also be adapted to other construction equipment with matching load requirements, including small cranes, material handling machines, and foundation drilling equipment.

Installation, Operation & Maintenance Guidelines

Before installation, inspect the QND1220.32Z7 slewing bearing for dimensional accuracy and seal integrity, and ensure the mounting surface is flat and free of debris. Tighten mounting bolts in a cross sequence with uniform torque to avoid uneven stress. During operation, avoid overloading the equipment beyond its rated capacity. Perform regular lubrication every 100 working hours, and conduct monthly inspections of seal condition and gear wear. For long-term equipment storage, apply anti-rust treatment and store the bearing in a dry, dust-free environment.

Customization & Bulk Procurement Solutions

We offer tailored solutions for construction machinery manufacturers, parts distributors, and project contractors, including custom mounting hole configurations, adjusted gear parameters, and material upgrades for extreme working conditions. For bulk procurement, we provide tiered pricing, stable lead times, dedicated technical support, and joint inventory planning to ensure consistent stock availability for after-sales and production needs.

FAQs About QND1220.32Z7 Excavator Slewing Ring

What excavator models is this slewing ring compatible with?

This bearing is engineered for all mainstream 21-23 ton hydraulic excavator models, and our engineering team can provide compatibility verification for specific equipment brands and models.

What is the lead time for bulk orders?

Standard bulk orders have a lead time of 15-25 working days, while custom orders can be fulfilled within 30-45 working days based on specification requirements.

How to extend the service life of the slewing ring?

Strict adherence to the lubrication schedule, regular seal inspections, standardized installation, and avoiding overloading are the core measures to maximize the service life of the bearing.