Product Overview
The SKF NU 306 ECM uses cylindrical rollers and line contact between the rollers and raceways, giving it higher radial-load capacity than a similarly sized ball bearing. The machined brass cage is designed for strength and controlled roller guidance.
In the NU design, the outer ring has two integral flanges while the inner ring has no flanges. This allows axial displacement of the shaft relative to the housing in both directions within the bearing, making it useful as the non-locating bearing in an arrangement.
NU 306 ECM is not an axial locating bearing. The complete machine layout must include another bearing or locating feature where shaft position has to be controlled.
Confirmed Specifications
| Brand | SKF Explorer |
|---|---|
| Designation | NU 306 ECM |
| Bearing Design | Single-row cylindrical roller bearing, NU design |
| Bore Diameter | 30 mm |
| Outside Diameter | 72 mm |
| Width | 19 mm |
| Basic Dynamic Load Rating | 58.5 kN |
| Basic Static Load Rating | 48 kN |
| Cage | Machined brass |
| Sealing | Open |
Key Features
- High radial-load capacity
- NU non-locating ring design
- Allows axial displacement in both directions
- 30 mm metric bore
- 72 mm outside diameter
- 19 mm width
- Machined brass cage
- Separable inner ring for easier assembly
Typical Applications
- Industrial electric motors
- Gearboxes and transmission equipment
- Pumps and compressors
- Machine tools
- Process machinery
- High-radial-load MRO replacement
Applications are selection references. Final bearing approval must follow the machine drawing, loads, speed, fits, lubrication and operating environment.
Compatibility and Selection Notice
Confirm that the machine needs an NU non-locating bearing. NU, NJ, NUP and N designs have different flange arrangements and cannot be treated as the same locating solution.
Check the complete ECM suffix, radial clearance, accuracy class, load, speed, shaft and housing fits, axial displacement range and lubrication before ordering.
Information Required Before Ordering
- Complete designation: SKF NU 306 ECM
- Old bearing marking
- 30 x 72 x 19 mm dimensional confirmation
- Locating or non-locating bearing position
- Radial load and speed
- Required internal clearance
- Lubrication and operating temperature
- Quantity and destination
MAVORIX Bearing Sourcing Support
MAVORIX is an independent China-side sourcing and supplier coordination partner, not the bearing manufacturer or an authorized distributor. We can help organize mixed bearing lists, compare complete designations, request supplier documents, coordinate label and dimension checks, and consolidate MRO shipments.
For a replacement inquiry, send the full suffix rather than only the basic bearing number. Related support is available through our industrial sourcing, electrical and mechanical parts, spare-parts sourcing and contact pages.