Stihl 9523 003 4304 – Grooved Ball Bearing (15×38×11 mm)
Product Description:
The Stihl 9523 003 4304 Grooved Ball Bearing is a genuine OEM part engineered for use in high-performance Stihl chainsaws—especially the MS311 and MS391 models. With precise dimensions of 15 mm inner diameter × 38 mm outer diameter × 11 mm width, this bearing is critical for ensuring smooth, efficient crankshaft movement under heavy load.
Crafted from high‑grade steel with tight tolerances, the bearing’s grooved design reduces friction, resists wear, and promotes quiet operation and long lifespan. It's built to handle the high RPMs and heavy vibrations typical of professional-grade chainsaws amazon.com+15lsengineers.co.uk+15oakleysgardenmachinery.co.uk+15.
Key Features:
✅ Part Number: 9523 003 4304
✅ Size: 15 × 38 × 11 mm
✅ Design: Grooved ball bearing for smooth rolling and low friction
✅ Material: High‑strength steel with precision ball raceways
✅ Fitment: OEM specification for seamless installation in Stihl crankcases
Compatible Models:
Specifically used in:
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Stihl MS311
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Stihl MS391
Also fits various Stihl units requiring 15×38×11 bearings weingartz.com.
(Always double-check your model’s parts diagram to confirm exact compatibility.)
Why Choose Genuine Stihl Bearings?
✅ Engineered to original OEM specs for reliable fit
✅ Promotes optimal performance and extends engine life
✅ Superior durability under high-speed, heavy-load conditions
✅ Trusted by professionals maintaining Stihl equipment
