GN203KRRB Agricultural Bearing Unit 17mm Bore Spherical OD Extended Inner Ring for Disc Harrow

The GN203KRRB agricultural bearing unit is designed for demanding tillage and planting applications. Featuring a spherical OD for self-aligning mounting, an extended inner ring for secure shaft engagement, and heavy-duty NBR contact seals, this bearing delivers reliable performance in disc harrows, rotary tillers, and seed drills. The 17mm bore meets ISO P0 tolerance, and the Gcr15 chrome steel (HRC 60-64) construction ensures wear resistance under continuous field operation. Each unit is pre-lubricated with lithium complex grease and 100% rotation-tested at GQZ's ISO 9001:2015 certified facility. Contact GQZ today to request a sample and experience the GN203KRRB quality firsthand.

• Spherical OD Self-Aligning Design: The spherical outer ring allows self-alignment within standard stamped steel housings, compensating for frame flex and mounting irregularities in tillage equipment.
• Extended Inner Ring: The inner ring extends symmetrically on both sides, increasing shaft contact area for improved load distribution and providing secure seating for the dual set screw locking system. This design reduces fretting corrosion and extends shaft life.
• Heavy-Duty NBR Contact Seals: Dual-sided contact seals molded from premium nitrile rubber exclude soil dust, crop residue, and moisture. The seal lip maintains consistent contact pressure across the full operating temperature range, preventing premature failure in the field.
• Gcr15 Chrome Steel Construction: Rings and balls are manufactured from vacuum-degassed Gcr15 bearing steel (AISI 52100), heat-treated to HRC 60-64 with precision-honed raceways for smooth rotation under heavy radial loads.
• Dual Set Screw Locking: Two hardened set screws at 120° offset provide secure shaft locking, resisting loosening under reversing impact loads and vibration typical of ground-engaging implements.

Ready to equip your tillage machinery with reliable bearings?

Request bulk pricing and current stock availability from GQZ now.

• Disc harrows, offset disc plows, and tandem disc implements
• Rotary tillers and power harrows
• Seed drills, planters, and precision seeding equipment
• Cultivators and row crop equipment
• Fertilizer spreaders and lime applicators
• Hay rakes, tedders, and mower conditioners

• ISO 9001:2015 Certified: Every batch manufactured with full material traceability and inspection reports.
• Agricultural Expertise: Developed from field failure analysis with design improvements addressing real failure modes in tillage equipment.
• Factory-Direct Pricing: In-house manufacturing eliminates intermediary markups without compromising quality.
• Global Supply Capability: 100,000-piece monthly capacity with flexible global shipping.
• Technical Partnership: Engineering support for bearing selection, installation guidance, and maintenance planning.

Don't wait for bearing failure to slow your season — contact GQZ now to secure your GN203KRRB supply with fast global delivery.

Q1: What type of housing is compatible with the spherical OD of the GN203KRRB?

The spherical OD is designed to fit standard stamped steel agricultural housings commonly used on disc harrows and tillage equipment. The self-aligning design accommodates housing bore tolerances and minor frame distortions, eliminating the need for precision-machined housing bores.

Q2: What is the recommended relubrication interval for field use?

For tillage equipment operating in dusty soil conditions, we recommend relubrication every 100-150 operating hours during the working season. Apply fresh lithium complex NLGI 2 grease until clean grease purges from the seals. More frequent intervals may be needed in sandy or abrasive soil conditions.

Q3: What is the minimum order quantity and typical lead time?

Standard MOQ is 20 pieces. In-stock items ship within 3-5 working days. Seasonal pre-orders for agricultural peak periods are recommended, with production lead times of 15-25 days for larger quantities. Contact our sales team for current stock levels and volume pricing.

Q4: Can the GN203KRRB be used with alternative lubrication types?

Yes. While pre-filled with lithium complex NLGI 2 grease, the bearing is compatible with most agricultural-grade greases. For food-grade applications or extreme-temperature environments, consult our engineering team for compatible grease recommendations before relubrication.