Mining Machinery Carburized Helical Gear

  • involute
  • 18CrNiMo6
  • 20°
  • DIN 3962 class 6


Product Description

Gear Basic Data
Gear Tooth Shape involute
Gear Material 18CrNiMo6
Gear Process forging, carburization, plane and internal grinding, tooth grinding, line cutting
Pressure Angle 20°
Quality level DIN 3962 class 6
Gear Type M=9, Z=33, a=20°, β=8°, x=0.2, right-handed

Capabilities of Gear/Spline

Internal Gears and Internal Splines
Maximum O.D. 2500 mm 2500 mm 2500 mm
Minimum I.D. 650 mm 50 mm 100 mm
Maximum Face Width 500 mm 500 mm 500 mm
Maximum Diametral Pitch D.P. 1 D.P. 1 DP 0.5
Maximum Module 26 mm 26 mm 45 mm
AGMA Level/ DIN Level DIN Class 8 DIN Class 8 DIN Class 4
Tooth Surface Finishing Ra 3.2 Ra 3.2 Ra 0.6
Maximum Helix Angle ±22.5° ±22.5° ±45°
External Gears and External Splines
Maximum O.D. 1250 mm 2500 mm 2500 mm
Minimum O.D. 20 mm 200 mm 20 mm
Maximum Face Width 500 mm 500 mm 1480 mm
Maximum Diametral Pitch D.P. 1 D.P. 1 DP 0.5
Maximum Module 26 mm 26 mm 45 mm
AGMA Level/ DIN Level DIN Class 8 DIN Class 8 DIN Class 4
Tooth Surface Finishing Ra 3.2 Ra 3.2 Ra 0.6
Maximum Helix Angle ±45° ±45° ±45°


Helical gears generally have longer and stronger teeth than the other gears. Due to the greater surface contact area on the teeth, these gears can carry a heavy load, but the efficiency is reduced because of the same reason. Forging produces helical gears that are quiet and make less vibration. These gears are very similar to spur gears, except that the teeth of helical gears are cut at an angle to the axis. An intriguing thing about helical gears is that if the gear teeth’ tips are correct, they can be raised on perpendicular shafts, where the revolving angle is adjusted by 90 degrees. These are available in both right and left-hand configurations.

The helical gears provided by us are made as per the industry’s standards and are widely used in the automotive and engineering industries. These can also be customized as per the client’s requirements. We provide helical gears upto 1000mm O.D. and 80 modules in different varieties such as hard, soft, or ground. Helical gears are pretty similar to industrial gears. They have teeth that are slanted and thus help in meshing the gear. The teeth of helical gears are connected better than those of spur gear.

They can be configured to either crossed or parallel as per the needs of the applications. When it comes to mechanics, parallel helical gears are much better. The reason behind this is that helices meet at tangents that do not happen in crossed gears, thus limiting the contact point to the tooth’s surface. So it is not advisable for applications that concern heavy loads to use crossed gear.

Our Service

Before Sales

1. Customer provides detailed drawings.
2. Evaluate the drawing, communicate the technical and quality questions, and then make quotations.
3. face-to-face communication the not settled questions.
4. Make-up PPAP files.
1.The customer does not provide a detailed drawing and asks for design cooperation for the gear part.
2. Evaluate the drawing, simulate the optimized design, detailed makeup drawing, and then make a quotation.
3. Makeup PPAP files.

In Process

1. Communicate detailed technical questions found during process makeup.
2. Make traceability marking.
3. Make and improve complete production flow and transportation packing plan.


1. Follow the product application condition.
2. For quality complaints, give feedback within 24 hours and submit an 8D report within 48 hours. If necessary, professional staff would be in the field on the customer side, communicating and solving the problem.
3. Continuously improve machining processes, improve product quality and shorten the lead time.
4. Visit customers abroad every year, to get better cooperation in technical, quality and commercial aspects.