This genuine STIHL 11456402051 worm gear is an essential component for the oil pump drive system in various STIHL chainsaws, including the MS 201, MS 201 T, MS 201 C-E, and MS 201 TC-M models. Featuring a 1/4" pitch, this OEM worm gear ensures precise and reliable lubrication delivery, critical for maintaining the performance and extending the lifespan of your chainsaw. Manufactured to STIHL's exacting standards, it guarantees perfect fit, durability, and seamless integration with your equipment.