Each and every Sumo Gear comes etched, “SUMO GEAR MADE IN JAPAN“. That’s because all of our gears are precision machined in Japan. This key partnership allows us to take advantage of the best materials and machinery ensuring consistent quality, unmatched strength, and reliability with quiet performance on and off road.
For material, we chose SCM420H after studying what companies like Toyota and Suzuki use as the primary material for their drivetrain. While SCM420H is a higher carbon steel than SCM415 it has the same carbon content as SCR420H, which is the material choice of Japanese Auto makers. A detailed comparison of the OEM material and SCM420H and more information can be found here.
While the selection of the material is a critical part of the design of a gear, tooth design, including profile and pressure angles, also plays a large role in long-term performance. Which is why having All Auto and their over 25 years of experience behind the Sumo Gear is critical. All Auto, is a leading supplier of gears and shafts that can be found in vehicles of all types around the globe, as well as turning propellers in the sky where there is no room for error.
