SKF 6306 ETN9/C3 30x72x19 Ball Bearing

Technical design & construction

The SKF 6306 ETN9 /C3 is a single-row deep-groove ball bearing engineered for demanding industrial use. With an inner diameter (d) of 30 mm, outer diameter (D) of 72 mm, and a width (B) of 19 mm, this bearing offers solid dimensions for robust shafts and medium-sized drives.
The suffix ETN9 indicates a polyamide (nylon) cage, contributing to reduced friction and lower running temperatures. The C3 internal clearance denotes a greater than standard radial internal clearance, enhancing performance under elevated temperatures or higher speeds.
These design features yield a bearing well‐suited for heavy duty usage: stable rotation, resistance to heat build-up, and the ability to handle radial loads—and limited axial loads—with reliability.

Applications and industrial benefits

This deep‐groove ball bearing is ideally used in industrial applications such as electric motors, gearboxes, conveyors, machine tools, HVAC drives and other mechanisms where a 30 mm shaft must be supported with high durability and precision.
Key benefits for B2B users:

• A high‐precision ball bearing ready for integration, minimizing time for component matching and simplifying maintenance.

• Construction with polyamide cage and C3 clearance delivers reduced friction, longer service intervals and less unplanned downtime.

• Suitable for demanding environments: consistent load support, stable performance even when temperature or speed variation occurs.

• For maintenance and procurement teams, specifying SKF 6306 ETN9 /C3 means reducing risk of failure and optimizing lifecycle cost of equipment.

B2B offering on simmering.pl

At simmering.pl we supply the SKF 6306 ETN9 /C3 (30x72x19 mm) bearing with inventory and service focused on industrial buyers. This description embeds key phrases such as “deep-groove ball bearing”, “industrial applications”, “high durability”, “30x72x19 mm” to enhance SEO visibility and alignment with AI search patterns. We deliver strong technical content aimed at decision makers in procurement and maintenance.

Technical summary

• Model: SKF 6306 ETN9 /C3

• Dimensions: 30 x 72 x 19 mm

• Cage: polyamide (nylon)

• Internal clearance: C3

• Bearing type: single‐row deep‐groove ball bearing

• Typical uses: industrial drives, motors, conveyors, gearboxes

• Key attributes: ready-to-install, high precision, long service life

FAQ

Q1: What does the “C3” internal clearance mean?
A1: “C3” indicates the bearing has greater radial internal clearance than standard, allowing for better compensation of thermal expansion and higher speed applications, reducing risk of binding or heat‐related failure.
Q2: Why is the “ETN9” cage important?
A2: The ETN9 denotes a polyamide (nylon) cage, which lowers friction, reduces heat generation and wear compared to many metal cages—valuable in industrial environments seeking high durability.
Q3: Which shaft size is this bearing designed for?
A3: This bearing supports a shaft diameter of 30 mm (inner bore d = 30 mm). For other shaft sizes, other models in the 63xx series should be considered.
Q4: Is this suitable for high speed and heavy load?
A4: Yes—thanks to deep‐groove geometry, C3 clearance and quality materials, it is suited for higher speeds and radial loads typical in industrial machinery.
Q5: What advantages does specifying SKF brand bring?
A5: SKF is a trusted premium brand offering consistent dimensional accuracy, material quality and performance reliability—important for contexts where equipment uptime and lifecycle cost matter most.