Customized Cylindrical Circular Spur Ring Gear Industrial Heavy Duty Flange Reducer Girth Gear Parts

• Customization: Available
• Application: Motor, Machinery, Industrial Transmission, Mining, Servo Motor
• Hardness: Hardened Tooth Surface
• Model NO.: Ring Gear
• Gear Position: External Gear
• Manufacturing Method: Rolling Gear
• Toothed Portion Shape: Spur 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: 84834090
• Production Capacity: 5000/Year
• Package Size: 150.00cm * 50.00cm * 150.00cm
• Package Gross Weight: 500.000kg

Product Description

Heavy-Duty Internal Ring Gear – Planetary / Epicyclic Carrier Ring

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

Specification

Applications

• Wind-turbine yaw & pitch drives (1.5–15 MW class)
• Mobile crane swing gears & crawler final drives
• Tunnel boring machine (TBM) cutter-head reducers
• Offshore winch planetary stages
• Large industrial mixers & extruders

Key Configurations

• Module: m 8–40 (custom)
• Teeth: internal helical, 20° pressure angle, 15°–30° helix angle
• Pitch diameter: 1,000–5,000 mm (larger on request)
• Face width: up to 800 mm per row
• Accuracy grade: DIN 3962 / ISO 1328 Grade 6–7 (grindable to Grade 5)
• Material: forged 42CrMo4V, 18CrNiMo7-6 or ASTM 4320/4340
• Hardness:
– Carburized & hardened tooth flank 58–62 HRC, case depth 2.5–4 mm
– Core toughness 30–35 HRC
• Heat treatment: quench & temper → carburize → finish grinding → shot peening

Structural Features

Double-row design allows two planetary stages in one envelope, cutting length and weight by ≈ 20 %.
Internal helical teeth provide smooth, low-noise engagement (≤ 78 dB @ 1 m).
Segmented or one-piece options: rings > 3 m OD are split for transport, dowel-bolted on site—no post-weld stress relief.
Integrated pilot bore & bolt circle for direct shrink-fit to housing, eliminating separate hub.
Lubrication galleries machined into the rim for forced-oil cooling; sealed with labyrinth seals IP65.
[Performance Data]
• Nominal torque: 0.5–15 MN·m per row
• Service factor (AGMA 2001): ≥ 2.3
• Operating temperature: –40 °C to +120 °C
• Design life: L10 ≥ 100,000 h under 100 % load

In one sentence

A precision-forged, carburized and ground internal ring gear that shrinks installation length while multiplying torque—engineered to run silently for decades inside the planetaries of wind giants and heavy machinery.

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 technical assistance and spare parts supply.
Training: On-site or remote operation/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, sales of all kinds of reducer, electric roller. The company has passed IS09001 quality system certification, IS014001 environmental system certification, OHSAS18001 occupational health and safety system certification, American Association product certification, national mining products coal mine safety mark certification. It is an excellent enterprise in China and a meritorious enterprise in Shanxi Province, and its "Xinkai" trademark has won the title of China Famous trademark.

Company Overview and Product Introduction

Market Applications and Corporate Philosophy

Our company has perfect quality control, product development, technological innovation system and strict testing system and product after-sales service organization. In recent years, we have continuously increased investment in scientific research and optimized the conditions and means of scientific research. The main products are double arc herringbone gear reducer, ZDY, ZLY, ZSY hard tooth surface cylindrical gear reducer, DBY, DCY hard tooth surface conical cylindrical gear reducer, cycloidal pin wheel reducer, NGW planetary gear reducer, JS mining high-power reducer and other 20 series, more than 3,000 kinds of specifications of reducer and electric roller.

All kinds of reducers produced by our company are widely used in major petroleum, metallurgy, chemical, building materials, lifting, transportation, shipping, mining and other enterprises' products supporting use, the market is all over the country, exported to Europe, America and Southeast Asia and other countries and regions.

Our company has formed a "gather the wisdom of employees, the pursuit of customer satisfaction" as the business philosophy, to "create China's first-class products, create the world famous brand" as the vision, to "respect, tolerance, integrity, rigorous" as the core values of the Xinkai corporate culture.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

FAQ

Q: What's the lead time for orders?
A: Standard sea models ship in 30-40 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

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