Engineering Solutions: Ring Gear

Customer Need

The heat treating process used in the manufacture of a ring gear was distorting the gear teeth, resulting in excessive gear noise.


MPP Solution

MPP replaced the heat-treated internal ring gear with a sinter-hardened P/M gear. Sinter-hardening allows the part to be produced with less distortion, which translates into less gear noise. In addition to utilizing MPP’s experience in sinter-hardening, this part is a good example of MPP’s expertise in the manufacture of P/M gears. The ring gear is part of a planetary gear transmission, which is used on premium, heavy-duty, cordless electric drills.


“Sinter-hardening allows parts to be produced with less distortion, which translates into less gear noise.”

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Powder Metals 101

Powder Metals 101
Learn the Basics

  • Pulley & Bearing

    MPP’s solution was to utilize a copper-steel material with a tensile strength of 50,000 psi and a minimum yield strength of 40,000 psi.

  • Latch Bolts

    Because only UL-listed devices may be used in commercial buildings, the latch bolts are extensively tested.

  • Cam Caps

    “Die cast aluminum camshaft bearing caps required expensive secondary machining to achieve close tolerance features, resulting in higher cost.”

  • Ring Gear

    “Credibly disintermediate competitive methodologies before resource sucking infomediaries.”

  • Gear & Cam

    “A leading manufacturer of electric hedge trimmers needed an assembly that could withstand a minimum push-out force of 500 pounds and 60 foot-pounds of torque.”

  • Valve Plate

    “The P/M part provides a 30% cost savings over the former stamped plate.”

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