Customized Gear Industrial Bull Gear Parts for Maximum Torque

• Customization: Available
• Application: Motor, Machinery, Industrial Transmission, Mining, Servo Motor
• Hardness: Hardened Tooth Surface
• Model NO.: Helical Gear
• Gear Position: Internal Gear
• Manufacturing Method: Rolling Gear
• Toothed Portion Shape: Double Helical Gear
• Material: Cast Steel
• Type: Circular Gear
• Customizable: Yes
• Design Source: Factory/Clients
• Spot Goods: Non
• Installation: Assisted Installation
• Transport Package: Packed in Wooden Cases
• Specification: ISO
• Trademark: XINKAI
• Origin: China
• HS Code: 84834020
• Production Capacity: 5000/Year
• Package Size: 150.00cm * 50.00cm * 50.00cm

Product Description

Heavy-Duty Segmented Double-Helical Bull / Girth Gear

Optimized for ultra-low-speed, high-torque, continuous-duty in mine ball mills, cement rotary kilns, and metallurgical rolling stands. Single-piece weight 1–25 t, max pitch diameter up to 12 m. Available as one-piece or multi-segment rings for on-site, no-stress-relief bolted assembly.

Specification

Applications

Ideal for industrial heavy-duty gearboxes

Key Configurations

• Module: m 20–60
• Number of teeth: 120–720
• Helix angle: 15°–30° (double-helical, zero axial thrust)
• Accuracy grade: ISO 1328-1 Grade 6–8 (grindable to Grade 5 on request)
• Heat treatment:
– Tooth surface induction hardened & tempered HRC 50–55
– Core toughness HB 220–260
• Materials:
– Standard: ZG35CrMo / ZG42CrMo cast steel
– Extreme duty: 18CrNiMo7-6 forged steel or ASTM 4140/4340 quenched & tempered forgings
• Inspection: 100% UT/MT non-destructive testing, CMM tooth-profile inspection, magnetic-particle test included with every gear

Application & Compatibility
Industry	Typical Application
Renewable Energy	Wind Turbine Yaw & Pitch Drives
Construction	Excavator Slewing Rings, Crane Hoists
Automotive	Automatic Transmission, Diffrential Units
Industrial Automation	High-Precision Planetary Reducers, Robotics

Structural Features

1. Split-flange joint with dowel pins + high-tensile bolts; field assembly in < 4 h without post-weld stress relief.
2. Double-helical teeth ensure smooth engagement, noise ≤ 82 dB(A), service factor ≥ 2.5 per AGMA 2001-D04.
3. Pre-machined laser-alignment bores ensure on-site concentricity ≤ 0.15 mm.
4. Surface protection: epoxy zinc-rich primer + polyurethane topcoat, 720 h salt-spray resistance for outdoor dusty environments.

Technical Specifications

(Custom configurations available upon request.)

Why Choose Us?

"Install once, enjoy maintenance-free service for a decade" — crafted in a 10,000-ton press, finished on 5-axis gantry grinders, these industrial marvels operate quietly and reliably in 24×365 dusty, high-load environments.

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 24 months.
Global Support: 24/7 expert technical support and comprehensive spare parts service.
Expert Training: On-site or virtual operation and maintenance training.

Company Profile

Shanxi Pingyao Reducer Co., LTD.

Shanxi Pingyao Reducer Co., LTD. (Shanxi Pingyao Reducer Factory) was established in 1958, specializing in R & D, manufacturing, and sales of various reducers and electric rollers. The company holds IS09001, IS014001, OHSAS18001 certifications, American Association certification, and national coal mine safety certifications. Recognized as an exemplary enterprise in China and Shanxi, its "Xinkai" trademark is a China Famous trademark.

Company Overview & Product Introduction

Market Applications & Corporate Philosophy

Our company boasts an impeccable quality control, product development, and innovation system, complemented by rigorous testing and after-sales services. We have bolstered scientific research investments, refining research conditions and capabilities. Our products include double arc herringbone gear reducers, ZDY, ZLY, ZSY hard tooth surface cylindrical reducers, DBY, DCY hard tooth surface conical cylindrical reducers, cycloidal pin wheel reducers, NGW planetary reducers, JS mining high-power reducers, and more, spanning 20 series with over 3,000 specifications of reducers and electric rollers.

Our reducers are integral to major industries such as petroleum, metallurgy, chemicals, building materials, lifting, transport, shipping, and mining. Our market presence spans nationwide and extends to Europe, America, and Southeast Asia.

Our business philosophy is to "gather employee wisdom, pursue customer satisfaction," with a vision to "create China's top products, establish a world-renowned brand," and core values of "respect, tolerance, integrity, and rigor" as pillars of Xinkai culture.

Why Choose Us?

Additional Products

OEM/ODM expertise
Competitive pricing and bulk discounts
Swift shipping and customs support
Comprehensive turnkey solutions

FAQ

Q: What's the order lead time?
A: Standard sea models are dispatched in 30-40 days.

Q: Is after-sales service available overseas?
A: Yes, we have service partners in key regions.

Q: Can I customize the bucket size?
A: Certainly! We provide custom attachments.

Q: What documents do you provide for export?
A: Comprehensive export package including Commercial Invoice, Packing List, Bill of Lading, COC.

Q: How do I place an order?
A: Reach out via email/phone for a quote, then confirm your order with a PO.