010.75.3550 Slewing Bearing

010.75.3550 Slewing Bearing – Non-Gear Heavy-Duty Turntable Bearing

Luoyang Heng Guan Bearing Technology Co., Ltd. is a modern enterprise specializing in the research, development, and manufacturing of high-precision bearings. With over 30 years of industry experience, we produce Slewing Bearings ranging from 50-10,000mm in diameter, covering precision grades P0, P6, P5, and P4. The 010.75.3550 Slewing Bearing is a single row four-point contact ball slewing bearing from our 01 series, featuring a 3550mm raceway center diameter and non-gear design. Built with forged 50Mn rings and induction-hardened raceways, it delivers 26,900 kN static axial capacity. This 010.75.3550 slewing ring suits heavy-duty rotary platforms requiring external drive systems, including cranes, welding positioners, and aerial platforms.

Product Overview

The 010.75.3550 turntable bearing represents a proven solution for applications where integrated gearing is unnecessary or detrimental to system performance. This non-gear slewing bearing eliminates gear vibration and simplifies sealing in harsh environments.

Three Core Advantages:

· Forged Steel Construction: Entire raceway rings are forged from 50Mn alloy steel, ensuring uniform grain structure and superior fatigue resistance compared to cast alternatives.

· Precision Induction Hardening: Raceways undergo controlled induction quenching to achieve 55-62 HRC surface hardness while maintaining a tough core, preventing crack propagation under shock loads.

· Compact Design: At only 174mm height, this single row four point contact ball slewing bearing offers remarkable space efficiency for platforms with limited vertical clearance.

Technical Specifications

Basic Dimensions

Mounting Dimensions

Load Performance

Materials & Processing

Competitive Differentiation: We provide complete mounting surface flatness tolerances and three-axis load data (axial, radial, moment), while competitors typically list only axial capacity. This transparency helps you validate structural compatibility during equipment design.

Gear Reference & Customization

The 010.75.3550 is delivered as a slewing bearing without gear by default, ideal for external motor drive systems or belt-driven rotary tables. However, our factory offers gear customization on the same base dimensions:

Gear Options Available:

This modular approach transforms the "non-gear limitation" into a customization advantage. You can prototype with a non-gear version, then transition to geared variants as your drive system evolves—without redesigning mounting interfaces.

Applications

Heavy-Duty Cranes

The four point contact slewing ring serves as the upper turret bearing in crawler cranes and lattice-boom truck cranes in the 150–300 ton class. External hydraulic motors drive rotation directly via pinion engagement on mounting bolts, eliminating the need for the bearing to carry a built-in gear ring.

Welding Positioners

Large-diameter workpieces like wind tower sections and pressure vessels demand smooth, low-speed rotation. This single row ball slewing bearing supports the positioner table while servo-driven worm gears provide precise angular control for automated welding paths.

Bulk Material Handling

Port shiploaders and reclaimers use this heavy duty slewing ring in their rotating booms. The sealed design resists coal dust and iron ore ingress, while the high radial capacity handles asymmetric loading during material discharge.

Aerial Work Platforms

Telescopic boom lifts require a compact bearing for the turntable. The 174mm height of this non-gear slewing bearing fits within narrow turret housings, while external ring gear drive simplifies emergency manual override systems.

Radar & Antenna Mounts

Large phased-array radar systems rely on this large diameter slewing bearing for azimuth rotation. The four-point contact geometry absorbs wind-induced tilting moments without clearance, maintaining beam-pointing accuracy.

Series Comparison

This comparison helps you identify the correct variant. Choose 010-series for hydraulic motor drives, 011 for open pinion meshes, and 013 for internal drive in space-constrained turrets.

OEM Manufacturing Capabilities

As a slewing bearing factory OEM partner, Heng Guan Bearing provides comprehensive manufacturing services for the 010.75.3550 Slewing Bearing beyond standard catalog items:

· Reverse Engineering: Our team performs on-site measurement of worn bearings, creating CAD models without requiring original drawings.

· Load-Optimized Design: We conduct FEA analysis to reinforce raceways for your specific duty cycles.

· Integrated Machining: From forged blanks to finish-ground raceways, drilling, and gear cutting—all processes stay in-house under ISO9001 quality control.

· Flexible MOQ: We support single-unit prototype orders to 100+ unit fleet replacements.

Production lead time: 4-6 weeks for standard configurations, 6-8 weeks for custom gear machining.

Replacement & Aftermarket

This 010.75.3550 bearing serves as a direct replacement for most standard 01-series non-gear slewing bearings in the 3550mm raceway class.

Critical Matching Parameters:

1. D₁ (Outer Bolt Circle): Verify your existing mounting flange matches 3686mm ±2mm

2. D₂ (Inner Bolt Circle): Confirm 3412mm ±2mm compatibility

3. Height (H): Ensure 174mm clearance in your housing (our compact design often fits where taller bearings fail)

Before replacement, measure mounting surface flatness. If your existing platform exceeds 0.15/1000 deviation, we provide on-site machining services to restore geometry and prevent premature raceway wear.

FAQ

Q: Can this bearing operate in marine environments?

A: Yes. Specify our zinc-nickel coating option for salt spray resistance exceeding 1,000 hours per ASTM B117. We also offer sealed grease fittings for relubrication in corrosive conditions.

Q: What torque is required to rotate the bearing under full load?

A: Friction torque remains below 680 N·m at maximum static load. Actual values depend on preload adjustment and lubrication condition. Our engineers provide torque calculations based on your duty cycle.

Q: Do you supply installation tools?

A: We provide bolt torque sequences, flatness inspection procedures, and dial indicator setup guides. Hydraulic bolt tensioners are available for rent to ensure uniform preload across all 48+44 mounting bolts.

Q: How do I choose between 010, 011, and 013 series?

A: If your drive motor is external (hydraulic or belt), choose 010. For direct pinion mesh on crane upperworks, select 011 (external gear). For compact turret designs with internal ring gear drive, specify 013.

Q: What is the expected service life?

A: Under properly maintained conditions (relubrication every 500 hours, correct preload), design life exceeds 20,000 hours for standard duty cycles. We calculate L10 life based on your actual load spectrum.

Contact Us

Ready to specify the 010.75.3550 Slewing Bearing for your project? Our engineering team provides:

✅ Free CAD drawings in STEP/IGES format

✅ Load capacity verification for your application

✅ Competitive quotations within 24 hours

✅ Technical consultation on drive system integration

Email: mia@hgb-bearing.com