6004 2RS C3 3/4″ (19.05x42x12 mm) Ball Bearing

Precision Compact Bearing for Special Shaft Dimensions

Sealed, Standard-Size Unit with ¾-Inch Bore for Industrial Drives

The 6004 2RS C3 3/4″ bearing is a single-row deep-groove ball bearing featuring an inner diameter of 19.05 mm (¾ inch), outer diameter of 42 mm and width of 12 mm. The “2RS” denotes rubber seals on both sides, ensuring protection against dust, dirt and moisture. The “C3” internal clearance improves tolerance for thermal expansion, shaft misalignment or moderate load fluctuations. This dimension-specific bearing is designed for reuse in systems that require a ¾-inch bore — a key differentiator from standard 6004 bearings.

Key Benefits & Ideal Applications

Reliable, Low-Maintenance Bearing for Diverse Industrial Use Cases

• Exact ¾-inch bore (19.05 mm) — perfect for machinery or equipment using imperial-sized shafts, eliminating the need for adapters or custom machining.

• Sealed 2RS design — contamination resistance: seals protect internal components and lubricant, extending bearing life and reducing maintenance intervals.

• C3 internal clearance — thermal and dynamic tolerance: ensures stable rotation under temperature variations, dynamic loads or slight shaft deflection.

• Compact, standard form factor — allows straightforward replacement or installation in bearing housings and standard assemblies with minimal modification.

• Balanced load handling — supports radial loads and modest axial loads while maintaining smooth, low-friction operation; suitable for motors, gearboxes, pumps, fans, conveyors and light mechanical drives.

Detailed Product Description

The 6004 2RS C3 3/4″ (19.05x42x12 mm) deep groove ball bearing is engineered for applications demanding precise shaft compatibility, robust sealing, and reliable performance in industrial environments. Its standout feature — a ¾-inch bore — makes it especially valuable for machinery built to imperial standards or legacy equipment where direct replacements are required without adapters.

Rubber seals on both sides (2RS) ensure effective protection of the rolling elements and grease from contaminants like dust, slurry, metal shavings or moisture — critical in workshops, production lines or outdoor installations. Thanks to this sealing, the bearing delivers lower maintenance demands, longer operational cycles and reduced downtime.

The C3 internal clearance offers an added buffer for thermal expansion, shaft misalignment or vibration. This tolerance improves longevity and operational stability under variable load conditions, especially when equipment runs at high speed, in changing temperatures, or under intermittent load.

Despite its compact dimensions, the 6004 2RS C3 maintains solid radial load capacity and handles moderate axial loads, making it versatile for many applications: electric motors, gearboxes, pumps, fans, conveyors, light machinery, and drive systems requiring reliable shaft support.

Because this bearing adheres to standardized measurements and is ready for installation, it simplifies maintenance, replacement or refurbishment — reducing cost, downtime and engineering effort. For businesses needing compatibility with ¾-inch shafts and reliable performance, this bearing is a practical, cost-effective solution.

FAQ - Frequently Asked Questions

Q: What does “¾ inch / 19.05 mm bore” mean for this bearing?
A: It means the inner diameter is 19.05 mm (¾ inch), ensuring direct fit on imperial-sized shafts without adapters.

Q: Can 6004 2RS C3 handle industrial loads?
A: Yes — it supports standard radial loads and moderate axial loads, suitable for motors, pumps, gearboxes, and other industrial equipment.

Q: Does the 2RS seal effectively protect against dust and moisture?
A: Yes — dual rubber seals maintain internal cleanliness and retain lubricant, which extends bearing life and reduces maintenance needs.

Q: Why is the C3 clearance important?
A: C3 provides extra radial play to compensate for thermal expansion, vibration or misalignment — enhancing reliability under dynamic or variable conditions.

Q: Is the bearing ready to install out of the box?
A: Yes — it comes sealed and dimensioned to standard specifications, so it can be mounted directly on ¾-inch shafts or within bearing housings without modification.