The STIHL 11166487700 Worm Gear is a genuine OEM replacement part designed for a wide range of STIHL professional chainsaws. This critical component ensures proper operation of the oil pump system, providing lubrication to the bar and chain. Compatible with popular models such as the STIHL 024, 026, 028, 034, 036, 038, 044, 046, 048, 064, 066, MS260, MS261, MS360, MS361, MS362, MS380, MS381, MS382, MS440, MS441, MS460, MS461, MS462, MS640, MS650, MS660, and MS661 series chainsaws, ensuring reliable performance and a precise fit.