If you're in need of a robust bearing insert for industrial applications, the UC317 radial ball insert delivers. With an 85 mm inner bore, 180 mm outside diameter, and wide inner ring, this heavy-duty unit excels in demanding environments. In this article, you’ll find detailed specifications, performance insights, installation considerations, and maintenance advice—crafted independently from user reviews.
Key Takeaways ✅
- Heavy-duty construction: 133 kN dynamic and ~97 kN static load ratings via high-quality bearing steel. :contentReference[oaicite:0]{index=0}
- Size and fitment: 85 mm bore, 180 mm OD, 96 mm wide inner ring. :contentReference[oaicite:1]{index=1}
- Shaft locking: Secured using set screws—reliable and easy to adjust. :contentReference[oaicite:2]{index=2}
- Sealing system: Dual-layer—sealed rubber and steel slinger—keeping contaminants at bay. :contentReference[oaicite:3]{index=3}
- Versatile brands: Offered by trusted manufacturers like NSK, SKF, NTN. :contentReference[oaicite:4]{index=4}
Technical Specifications 📊
| Bore (d) | 85 mm |
| Outer Diameter (D) | 180 mm |
| Inner Ring Width (B) | 96 mm |
| Outer Ring Width (C) | 46 mm |
| Dynamic Load Rating | 133 kN (≈ 29900 lbf) |
| Static Load Rating | 97 kN (≈ 21762 lbf) |
| Seals | Rubber + steel slinger (2-piece system) |
| Locking Method | Set screws (M16 × 1.5) |
| Operating Temp. | -20 °C to +120 °C |
| Material | Through-hardened bearing steel |
Why the UC317 Performs Well in Tough Conditions
The UC317 is a radial insert bearing designed to support heavy radial loads with minimal friction. Its wider inner ring enhances load distribution, and the dual-layer seal—combining nitrile rubber and a steel slinger—provides superior protection against dust and moisture, extending service life. :contentReference[oaicite:5]{index=5}
The set-screw locking design delivers a secure, vibration-resistant fit on the shaft while allowing simple adjustments—a key advantage in maintenance-intensive scenarios. :contentReference[oaicite:6]{index=6}
Typical Use Cases 🏗️
- Industrial conveyor systems and roller shafts.
- Heavy-load rotating assemblies and bulk material handling.
- Harsh or dusty environments—thanks to sealing design.
- Long uptime operations where regular re-lubrication isn't practical. :contentReference[oaicite:7]{index=7}
Installation & Maintenance Tips 🛠️
- Ensure shaft surface is clean and smooth; true to size.
- Align bearing correctly; tighten set screws to specified torque (typically via manufacturer specs, around M16 engagement). :contentReference[oaicite:8]{index=8}
- This bearing is "lubrication for life"—no relubrication needed unless used in extreme conditions.
- Check seals and external housing for signs of wear or damage during inspections.
Pros & Cons at a Glance ⚖️
Pros ✅
- High radial and static load ratings—ideal for heavy duty.
- Robust sealing handles contamination well.
- Wide inner ring for strength and rigidity.
- Single-piece lubricant—maintenance-light.
- Standardized size for cross-brand compatibility.
Cons ❌
- Weighty (~6.7 kg), which may matter in mobile applications. :contentReference[oaicite:9]{index=9}
- Set screws can cause shaft damage if overtightened—requires care.
- Relatively expensive—specialized part not cheap.
How It Compares to Alternatives 🔄
| Option | Best For | Strength | Trade-Off |
|---|---|---|---|
| UC317 Insert (this) | Heavy-duty, sealed, long-life | High load ratings + contamination protection | Heavier, more costly |
| Open insert bearing | Clean, low-load rigs | Lower cost, lighter | No seal = risk in dirty settings |
| Cartridge + housing units | Simple replacement/service needs | Fast maintenance, sealed | More complex, less affordable for one-off use |
Should You Choose the UC317?
Yes, if your applications demand extremely high torque capacity, minimal downtime, and resilient sealing—especially for heavy rotating machines or dusty/wet environments. The solid build, sealed design, and robust performance make UC317 a workhorse in industrial settings.
FAQs ❓
Is relubrication required?
No, it’s lifetime-lubricated under normal use; only inspect for damage or seal degradation.
Can the set screws damage the shaft?
Yes—use specified torque and avoid overtightening; ensure a clean shaft surface first.
Can this bearing tolerate misalignment?
Yes—the spherical outer ring allows slight self-alignment within compatible housings. :contentReference[oaicite:10]{index=10}
What temperature range does it support?
Approximately −20 °C to +120 °C for continuous operation. :contentReference[oaicite:11]{index=11}
Final Verdict 🏁
The UC317 insert bearing is a heavy-duty, maintenance-light solution engineered for challenging industrial needs. With solid load ratings, effective sealing, and durable construction, it stands out where reliability is non-negotiable. Keep your installation clean, follow proper torque, and this bearing will go the distance. Ideal for professionals who prioritize robustness over cost.
