This genuine Husqvarna ball bearing (part no. 536 78 98-01) is a precision-engineered component used to support high-speed rotational parts inside Husqvarna chainsaws. Manufactured from hardened bearing steel for strength and wear resistance, it reduces friction and helps maintain accurate alignment of rotating assemblies under load. By supporting smooth rotation and limiting play, it helps protect surrounding components and keeps the machine running efficiently. Designed for Husqvarna professional saws, it is an ideal replacement for routine maintenance or during an engine rebuild. Suitable for models including 545 Mark II and 550 XP Mark II, it offers dependable OEM fit and performance to keep your saw working reliably in demanding conditions.

Key Features:
- Genuine Husqvarna OEM bearing for exact fit and compatibility
- Precision-ground bearing steel for durability and long service life
- Reduces friction and vibration to support smooth, efficient running
- Built to handle high RPM and operating temperatures typical of pro chainsaws
- Helps maintain correct shaft alignment and protects adjacent parts
- Consistent quality control for reliable performance in tough conditions
- Straightforward replacement when refurbishing engines or addressing noisy/worn bearings
- Compatible with a wide range of Husqvarna 545/550 series variants for easy stocking

Typical Applications:
Used in the rotating assemblies of Husqvarna chainsaws to support shafts and reduce friction in high-speed, high-load areas. Commonly fitted during crankcase overhauls, when addressing bearing noise or play, or as preventative maintenance to restore smooth running and extend service intervals for professional forestry, arborist, and grounds maintenance work.

Also known as:
Radial ball bearing, deep-groove ball bearing, crankshaft bearing, engine bearing, rotation bearing, chainsaw shaft bearing, roller bearing.

Fits Models:
545, 545 Mark II, 545G Mark II, 550 XP Mark II, 550 XPG Mark II, 550XP, 550XP Mark II, 550XPG, 550XPG Mark II