Short Answer

DIN 3962 Gear Accuracy Class

DIN 3962 is a German standard used to evaluate gear manufacturing accuracy, including:

• Tooth profile deviation
• Pitch deviation
• Runout
• Tooth alignment

A lower DIN class number represents higher manufacturing accuracy.

For example:

• DIN Class 5-6: High precision gears
• DIN Class 7-8: Industrial precision gears
• DIN Class 9-10: General industrial gears

Large open gears such as girth gears commonly require suitable accuracy levels depending on equipment requirements.

How to Evaluate Girth Gear Tooth Wear?

Instead of using only a fixed wear value, engineers usually check:

1. Tooth Thickness Reduction

Excessive reduction of tooth thickness can reduce load capacity and increase the risk of tooth failure.

2. Tooth Contact Pattern

Uneven contact may indicate:

• Misalignment
• Improper installation
• Excessive wear

3. Backlash Changes

Incorrect backlash can cause:

• High impact loads
• Overheating
• Accelerated wear

How to Extend Girth Gear Service Life?

Proper manufacturing and maintenance are essential:

• Accurate machining according to DIN/AGMA standards
• High-quality cast steel materials
• Correct lubrication
• Regular tooth inspection
• Alignment checking

Tenfaye Girth Gear Manufacturing

Tenfaye manufactures large cast steel girth gears for:

• Rotary kilns
• Ball mills
• Mining equipment
• Cement plants

Capabilities:

• Diameter up to 16 meters
• Single casting weight up to 150 tons
• CNC machining
• Heat treatment
• UT/MT inspection

Through strict quality control and advanced manufacturing technology, Tenfaye provides reliable girth gears for global heavy industries.