Extended Inner Ring Bearings (VSB Series)
VSB series spherical roller bearings with extended inner ring on one side. Direct shaft mounting without adapter sleeves. Ideal for fans, conveyors, and light machinery.
VSB Series: Simpler Mounting, Same Performance
The VSB series features an extended inner ring on one side of the bearing, enabling direct shaft mounting without the need for additional adapter or withdrawal sleeves. This simplifies assembly, reduces parts count, and speeds up installation and maintenance.
Design Features
- Extended inner ring: Provides additional axial support surface for direct shaft contact
- Set screw or eccentric locking collar: Secure axial fixation without complex arrangements
- Standard spherical roller bearing internals: Same load capacity and self-aligning capability as standard SRB designs
- Cylindrical bore: Standard shaft tolerances, no special machining required
Benefits
- Simplified assembly: No adapter sleeves, no feeler gauges, no clearance adjustment
- Reduced parts count: Eliminates sleeve, lock washer, and lock nut
- Faster installation: Slide on, lock in place—done
- Lower maintenance skill requirement: Field replacement without specialist tools
Applications
- Industrial fans and blowers
- Belt conveyors and roller conveyors
- Agricultural machinery (augers, elevators)
- Light to medium-duty material handling
- General industrial rotating equipment
When to Choose VSB Over Standard SRB
Choose VSB when:
- You want to simplify field assembly and maintenance
- The application runs at moderate speeds (<2000 RPM)
- Axial loads are moderate (primarily radial loading)
- Standard shaft tolerances are acceptable
Stick with standard SRB + adapter sleeve when you need tapered bore mounting, very high speeds, or precision axial positioning.
RFQ Details to Send
Send these details so TFL Bearing can review the model, suffix, cage, clearance, bore type, application, documents, and quotation route before confirming current availability or production options.
| RFQ detail | Example | Why it matters |
|---|---|---|
| full bearing model | 22222 EK/C3 W33, 22320 CAK/W33, or photo of the full marking | Identifies the series, size group, bore style, clearance reference, and starting point for quotation review. |
| full suffix / marking | K, K30, C3, C4, W33, CA, CC, MB, 2RS, or full ring marking photo | Suffixes can change bore type, clearance, cage design, lubrication groove, sealing, and replacement risk. |
| cage type | CA machined brass, CC stamped steel, MB machined brass, or unknown with photo | Cage design affects load, vibration tolerance, lubrication behavior, and suitability for screen or crusher duty. |
| clearance class | CN, C3, C4, C5, or current suffix if the clearance is not separately known | Clearance must be reviewed with shaft fit, temperature, vibration, speed, and failure history. |
| bore type | Cylindrical bore, K 1:12 tapered bore, K30 1:30 tapered bore, adapter sleeve reference | Bore style changes mounting method, sleeve requirements, shaft fit review, and replacement compatibility. |
| application equipment | crusher, vibrating screen, fan, gearbox, conveyor pulley, paper machine, or steel mill position | Application context affects load, shock, speed, contamination, lubrication, and document review. |
| quantity | 1 large bearing, 2 pcs for maintenance, 50 pcs distributor stock, or annual demand | Quantity affects quote route, packing, production planning, inspection scope, and freight review. |
| destination | Destination country, port, warehouse, distributor address, or project site region | Destination affects export documents, packing method, shipping route, and trade-term review. |
| required documents | Inspection report, material certificate, COO, RoHS / REACH statement, packing photos, buyer template | Document requirements must be confirmed before quotation because scope depends on order route and buyer template. |
| target timing | Maintenance shutdown date, urgent repair, trial order timing, or normal replenishment schedule | Timing helps separate availability review, production planning, sample validation, and consolidated shipment options. |
Request VSB Series RFQ Review
Send us your specifications, drawings, and target quantities. TFL Bearing can review model fit, China supply options, available documents, and quotation details before confirming availability, production, or shipment timing.