The STIHL 30° Gearbox Assembly (Part Number: 4138-640-0201) is a genuine OEM angled drive attachment designed for STIHL fixed-length pole pruners (HT series) and long-reach hedge trimmers (HL series) equipped with round drive shafts. Featuring a fixed 30-degree offset, this angled gearhead optimizes cutting reach and blade geometry, making it significantly easier to flush-cut limbs, undercut high branches, or trim flat hedge tops without awkward body angles or added strain.
- Genuine STIHL OEM Gearhead: Direct factory replacement assembly (Part # 4138-640-0201 / 4138 640 0201) built to exact STIHL tolerances for smooth power transfer and maximum longevity.
- Fixed 30-Degree Angle: Positioned at an optimal 30° incline to improve line of sight, reduce wrist fatigue, and improve cutting leverage on high or overhead foliage.
- Heavy-Duty Commercial Design: Rugged, sealed metal gear housing engineered to handle high-rpm operation and tough commercial pruning environments.
- Round Shaft Fitment: Designed specifically for fixed-length, round-shaft outer drive tube configurations across STIHL HT pole saws and HL extended hedge trimmers.
- Model Compatibility: Fits select fixed-length round-shaft STIHL pole pruners and long-reach hedge trimmers (including HT 70, HT 75, HT 100, HT 101, HT 130, HT 131, HL 75, HL 100, and related series).
