1988
NTN4T-1988/192226.99 × 57.15 × 19.84mm
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$78.29
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Specifications
| Bore diameter (d) | 26.99 mm |
| Outer diameter (D) | 57.15 mm |
| Width (B) | 19.84 mm |
| Dynamic load rating (C) | 22 kN |
| Static load rating (C₀) | 12 kN |
| Weight | 130 g |
| Max speed (grease) | 3,000 rpm |
| Max speed (oil) | 4,500 rpm |
Why This Match Is Correct
✓Exact dimensional match (bore, OD, width)
✓Load ratings within tolerance
✓Seal type verified via manufacturer tables
✓Speed rating compatible
Equivalents Across Brands
| Brand | Part Number | Seal | Clearance | Status |
|---|---|---|---|---|
| NTN | 4T-1988/1922 | Open | CN | Equivalent |
| Timken | 1988/1922 | Open | CN | Probable |
| FAG | 1922 | Open | CN | Probable |
| FAG | 1988 | Open | CN | Current |
| FAG | 1988/1922 | Open | CN | Probable |
| Koyo | 1922 | Open | CN | Equivalent |
| Koyo | 1988 | Open | CN | Current |
| Koyo | 1988/1922 | Open | CN | Equivalent |
| NTN | 1922 | Open | CN | Equivalent |
| NTN | 1988 | Open | CN | Current |
| SKF | 1922 | Open | CN | Equivalent |
| SKF | 1988 | Open | CN | Current |
| SKF | 1988/1922 | Open | CN | Equivalent |
| Timken | 1922 | Open | CN | Probable |
| Timken | 1988 | Open | CN | Current |
Seal Type
Open (No Seal)
No seals or shields. Allows external lubrication and cooling. Lowest friction, highest speed capability.
Best forClean environments with external lubrication systems. High-speed applications where heat dissipation matters.
Avoid forDirty, dusty, or wet environments. Applications without planned lubrication maintenance.
Examples
- Machine tool spindles
- Gearboxes with oil bath lubrication
- High-speed precision equipment
Internal Clearance
Normal Clearance (CN)
Standard radial internal clearance. Suitable for most applications under normal operating conditions.
Best forGeneral-purpose use. Normal temperatures, standard fits, moderate speeds.
TemperatureUp to ~70°C operating temperature
Where This Bearing Is Used
Medium-Small (26.99mm bore) — Typical Uses
- General-purpose electric motors (1-10 HP)
- Pumps and compressors
- Automotive alternators and A/C compressors
- Conveyor rollers
- Agricultural machinery
- Washing machines
- Industrial fans
- Printing presses
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 1988/1922 | Open (No Seal) | CN |