Large Diameter Slewing Gear for Machinery Tools

Large diameter slewing gear

Produced in strict accordance with China National Standards, this large slewing gear is engineered specifically for machine tool applications requiring high transmission accuracy, excellent shock resistance, and operational stability. Ideal for CNC rotary tables, machining centers, and precision indexing mechanisms, the helical gear features a higher contact ratio than spur gears, delivering smoother meshing, lower noise, and greater load-carrying capacity. The slewing gear is forged as a single piece with continuous metal flow lines, and after Q&T treatment it obtains a uniform tempered sorbite microstructure that provides superior fatigue resistance and good machinability.

Features & performance advantages

Optimal strength-toughness balance: uniform tempered sorbite microstructure after Q&T treatment

Superior shock resistance: excellent tolerance to momentary overloads, less prone to tooth breakage

Excellent running-in characteristics: increased contact area after running-in for more uniform load distribution, smooth operation, low noise, high transmission efficiency

Specification

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Why Choose Us

High load capacity, wear resistance & long service life

Strict dimensional tolerance, smooth rotation

Customization drawings / OEM / ODM available

Direct factory price, stable delivery

Complete inspection & test report before shipment

Suitable for heavy-duty engineering & harsh working environment

After Sales Service

Tailored product according to your drawings or samples

Professional technical support anytime

Strict quality inspection & full set of shipping documents

Fast delivery & safe packaging (plywood pallet/case)

One-year quality warranty

FAQ

1.  What are the specific advantages of helical gears over spur gears in machine tool applications??

Helical gears offer several important advantages for machine tool use: 1. smoother operation: gradual tooth engagement reduces impact and vibration — critical for surface finish quality in precision machining; 2. higher load capacity: 20%~30% greater load rating than equivalent spur gears, handling heavy cutting forces better; 3. lower noise: important for maintaining a precision shop environment; 4. higher contact ratio: 2.0~3.0 vs 1.5~2.0 for spur gears — more teeth sharing the load at any moment; 5. axial preloading capability: the thrust force can be used with preloaded bearings to increase system rigidity. The main trade-off is axial thrust force, which requires thrust bearings. For machine tool applications where smoothness, precision, and load capacity matter, helical gears are almost always the preferred choice.

2. Why choose 42CrMo alloy steel for machine tools instead of other materials?

42CrMo alloy steel is a classic choice for the machine tool industry for several reasons: 1. after Q&T treatment, 42CrMo achieves an excellent balance of strength; 2. excellent hardenability: chromium and molybdenum alloying elements ensure through-hardening in large-diameter slewing gears, with uniform properties across large sections; 3. easy maintenance: soft tooth flanks can be re-ground after wear, reducing total lifecycle cost. For most medium-speed, medium-heavy load machine tool applications, 42CrMo material offers the optimal technical and economic solution.

*For technical consultation or custom quotations, please provide gear parameters (module, number of teeth, face width, accuracy requirements, operating conditions, etc.). Our engineering team will deliver a professional solution tailored to your specific needs.