RU8509 Agricultural Disc Harrow Ball Bearing (1.75" Bore) ── 1.75" x 85mm x 28.575mm (1-3/4" Bore) | Heavy-Duty Sealed Disc Gang & Tillage Implement Bearing Unit | Replaces RU8509 / RU8509-2RS Series

✦ Technical Specifications & Brand Matrix

Bearing Part Number: RU8509 / RU8509-2RS (Heavy-Duty Agricultural Disc Bearing)

Precise Physical Dimensions:

Inner Diameter (Shaft Bore - d): 1.75 in (44.45 mm / 1-3/4 in)

Outer Diameter (OD - D): 85 mm (3.346 in)

Overall Width / Thickness (B): 28.575 mm (1.125 in / 1-1/8 in)

Application Standards:

Fits standard 1-3/4" (1.75") round shaft disc harrow gang axles and heavy-duty tillage implement hubs.

⚡ Structural Advantages & Heavy-Duty Performance

28.575mm Extended Width for Increased Stability: 1.125" overall width distributes mechanical shock loads evenly across the shaft contact zone, substantially preventing shaft fretting and misalignment under deep soil penetration.

Multi-Lip Contact Rubber Sealing Shield: Advanced heavy-duty contact seals create a solid barrier against moisture, slurry, fertilizer dust, and abrasive soil grit contamination.

Maintenance-Free Synthetic Pre-Lubrication: Factory pre-filled with wide-temperature agricultural synthetic grease, completely eliminating daily field servicing downtime and lubricant washout.

Vacuum-Degassed GCr15 Chrome Steel: High-precision chrome steel balls and raceways deliver elevated dynamic load capacity and maximum resistance against field vibration fatigue.

🚜 Agricultural Machinery Deployment & Usage Scenarios

Heavy-Duty Disc Harrows & Cultivators: Essential heavy-duty bearing unit for disc gang axles, soil preparation tools, and stubble cultivators working under intense field drag.

Soil Tillage Implements & Land Rollers: Direct fit replacement for heavy agricultural disc Gangs and tillage equipment requiring a 1.75" x 85mm x 28.575mm bearing.

Severe Duty Farm Equipment: Designed for demanding tillage machinery operating continuously in harsh, damp, or dusty soil environments.