Large Girth Gear for Ball Mill and Kiln Drive

• Customization: Available
• Application: Motor, Electric Cars, Motorcycle, Machinery, Marine, Agricultural Machinery
• Hardness: Soft Tooth Surface
• Model NO.: SYM
• Gear Position: Internal Gear
• Manufacturing Method: Cast Gear
• Toothed Portion Shape: Spur Gear
• Material: Stainless Steel
• Type: Circular Gear
• Advantage: High Efficiency Low Energy
• Color: Customized
• Power: 800-20000kw
• Factory Visit: Welcomed Warmly
• Spare Parts: Supply All Using Life
• Quality: High Level
• Price: Negotiable
• Video Outgoing-Inspection: Provided
• Transport Package: Customized
• Specification: 1000*1000*1000
• Trademark: SYM
• Origin: Shanghai
• Production Capacity: 50000pieces/Year

Product Description

Girth Gear

The Girth Gear is a critical transmission component used in ball mills, rotary kilns, and tube mills. Manufactured from high-quality steel with precision machining and heat treatment, our girth gears provide long service life, stable operation, and high load-bearing capacity.
They are widely used in industries such as cement, metallurgy, mining, and power generation.

Mill Girth Gear

The roller shaft is divided into a smooth shaft and a gear shaft, a mechanical part that supports rotating parts and transmits motion. They are generally round metal rods. Each section can have different diameters, such as a vertical mill, ball mill or rotary kiln, dryer, and other equipment.

SYM Services

One stop EPC service engineering procurement and construction
On site installation and commissioning
Technical training and operation guidance
Spare parts support and after sales maintenance

Key Features

Mill Girth Gear

Material: High-strength alloy steel (e.g., 42CrMo, 35CrMo, ZG45)
Heat Treatment: Normalizing, Quenching & Tempering
Precision Machining: CNC gear hobbing, grinding optional
Tooth Type: Spur or Helical
Module Range: M8–M50
Outer Diameter: Up to 10 meters
Hardness: HB190–280 / Customized
Standard: AGMA, DIN, ISO, GB

Application Fields

Cement Ball Mills
Rotary Kilns
SAG Mills
Tube Mills
Mining Grinding Equipment

Supporting Components

Mill girth gear
Shaft coupling
Mill trunnion bearing
Gearbox and reducer
Mill base and motor housing

Specification

Item	Specification
Material	42CrMo, 35CrMo, 20CrMnTi, etc.
Module	6 – 50
Gear Type	Helical / Spur
Accuracy Grade	DIN 6 – 8
Tooth Hardness	HRC 45 – 65
Gear Face Width	100 – 800 mm
Max Diameter	Up to 1600 mm
Heat Treatment	Quenching / Nitriding / Carburizing
Surface Finish	Machined and ground
OEM Service	Yes (based on drawing or sample)

Company Profile

Why Choose SYM Machinery?

20+ years of mill equipment manufacturing experience
Full range of material options and wear solutions
Precision production with CNC machining
One-stop service: design, casting, machining, and shipment
On-site technical support and installation guidance

FAQ

Frequently Asked Questions

Q1: What information is needed for a quotation?
A1: Please provide outer diameter, tooth count, module, material, and application equipment.

Q2: Can you manufacture gears based on drawings?
A2: Yes, we support OEM and can produce according to detailed technical drawings.

Q3: What is the typical lead time?
A3: Standard delivery is 25–45 days depending on size and quantity.

Q4: Do you provide installation services?
A4: We can provide on-site installation and alignment guidance if required.

Q5: What inspection standards do you follow?
A5: All products are inspected per ISO, AGMA, or customer-specific standards.