| Symbol | Value | Description |
|---|---|---|
| nG | 3840 | Limiting speed |
| ≈m | 0.008 | Weight |
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SKF
SKF
SKF 9878 Oil Seal Rotary Shaft Seal
General Industrial Applications
Rotary Shaft Seal
RFQ
Estimated delivery: 18 Jul 2026 (domestic stock)
In stockEstimated delivery: 18 Jul 2026 (domestic stock)
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
- Category
- Rotary Shaft Seal
- Bore
- 25.4 mm
Overview
SKF 9878 Rotary Shaft Seal reduces lubricant leakage and contamination ingress around rotating shafts. It is a small but critical component used near bearings, gearboxes, pumps, and motors to maintain lubrication and protect equipment life.
The seal consists of an elastic lip and reinforcement or outer support structure. The lip contacts the shaft surface to provide sealing, with single-lip, double-lip, and low-friction variants selected by speed and contamination level.
Key features
- Reduces lubricant leakage
- Helps block dust and moisture ingress
- Protects bearing service life
- Fits compact mounting spaces
Typical applications
- Gearbox output shafts
- Pump and motor shafts
- Needle bearing adjacent positions
- Small industrial rotating equipment
Selection guidance
Verify shaft diameter, outside diameter, width, lip design, material, speed, temperature, and lubricant type.
| Symbol | Value | Description |
|---|---|---|
| d | 25.4 | Bore diameter |
Also searched as
The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:
SKF9878SKF 9878
