Manufactured by PRS Bearings, the PU45.1578 is a precision PU Series Four-Point Contact Ball Slewing Bearings. You may consider it as an interchangeable alternative and replacement for INA VU451578. Key dimensional parameters include a mm bore diameter, a mm outer diameter, and a mm overall width. With matching boundary dimensions, this component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
PU45.1578 - PU Series Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Direct Interchange | INA VU451578 |
|---|---|
| Overview | |
| Basic Model | PU45.1578 |
| Weight | 460 kg |
| Mounting Dimensions | |
| Outer Ring O.D. (Da) | 1752 mm |
| Inner Ring O.D. (da) | 1580 mm |
| Inner Ring I.D. (di) | 1431 mm |
| Outer Ring I.D. (Di) | 1576 mm |
| Mounting Holes | |
| Outer Ring Hole Pitch Dia. (La) | 1671 mm |
| Inner Ring Hole Pitch Dia. (Li) | 1485 mm |
| No. of Outer Ring Holes (na) | 44 |
1580 mm 1485 mm 1431 mm mm 1576 mm 1671 mm 1752 mm 44 mm PU45.1578 Frequently Asked Questions about PU45.1578 PU Series Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Every PU45.1578 batch undergoes 100% automated vibration and noise testing at the PRS Bearings factory. We guarantee compliance with Z1/V1 standards, with premium Z3/V3 options available for high-end electric motors.
Depending on your thermal and fit requirements, PRS Bearings supplies the PU45.1578 in C0 (Normal), C2 (Tight), or C3 (Loose) internal radial clearances. Proper clearance selection by PRS Bearings specialists helps prevent premature bearing seizure.
PRS Bearings recommends storing the PU45.1578 in its original packaging in a clean, low-vibration warehouse. Maintaining a relative humidity below 60% and a stable room temperature ensures maximum shelf life.
PRS Bearings provides the PU45.1578 with various cage options including high-strength pressed steel, machined brass for high-vibration tasks, or reinforced polymers for the quietest operation in precision machinery.