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Advanced gear design

Ensuring equal pressure distribution

Unlike other gear manufacturers, SMS calculates and improves tooth and flank profiles individually. That ensures equal pressure distribution over the entire load flank. As a result, the maximum contact pressure is approximately 30% lower than that of standard teeth.

To realize equal distribution of contact pressure and avoid premature meshing, SMS designs the tooth and flank profiles in three steps:

Standard calculation according to din, iso, or agma Image Standard calculation according to din, iso, or agma Image Standard calculation according to din, iso, or agma Image Standard calculation according to din, iso, or agma Image

Standard calculation according to din, iso, or agma

First comes preliminary calculation and design according to ISO, DIN, or AGMA standards, with safety factors based on more than 125 years of experience in metallurgical plant and rolling mill technology.

Calculation of local tooth contact pressure Image Calculation of local tooth contact pressure Image Calculation of local tooth contact pressure Image Calculation of local tooth contact pressure Image

Calculation of local tooth contact pressure

Next, our engineers examine the local contact pressure at the load flank. They also consider influences such as shafts, gearing, and housing deformations, as well as bearing behavior (internal bearing geometry). Normally, the result is an inhomogeneous pressure distribution on the tooth and flank profiles.

Calculation of improved tooth geometry and contact pressure Image Calculation of improved tooth geometry and contact pressure Image Calculation of improved tooth geometry and contact pressure Image Calculation of improved tooth geometry and contact pressure Image

Calculation of improved tooth geometry and contact pressure

Finally, all this goes into improving tooth and flank profiles to eliminate deformations such as tooth bending and shaft torsion. Our sophisticated design also prevents displacement and deviation caused by the gear housing or the roller bearings, especially at maximum drive train overload. That ensures homogeneous contact pressure at the load flank and high durability.

Power upgrade, advanced gear design

What sets SMS advanced gear design apart is that it increases the torque capacity of new gearboxes as well as existing gearboxes. Several customers have already replaced their existing mill pinions with new gear sets based on the advanced gear design. That ensures the new systems transmit up to 30% higher torques with the same outer dimensions.

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