Most side-bow chain problems trace back to a few familiar frustrations — too much dependence on lubrication, wear that builds up faster than expected, and noise that’s hard to ignore on a long shift. MAXTOP’s engineering team spent considerable time rethinking the bushing design to see how much of that could be changed.
What Is an Engineering Plastic Bushing Side-Bow Chain?
Side-bow chains are a staple in curved conveyor systems and automated equipment — but anyone who’s run them long enough knows the maintenance headaches that come with the territory.
Lubrication needs constant attention. Skip a cycle and wear picks up fast. Keep up with it, and you’re dealing with oil flinging onto products, pooling on floors, or getting washed away entirely in humid environments.
Metal-to-metal contact doesn’t help either — the noise adds up over a long shift. And getting into tight equipment spaces for regular re-lubrication is rarely as simple as it sounds.
That’s the problem the MAXTOP PNB Side-Bow Chain was built to solve.
How the Engineering Plastic Bushing Design Works
The key innovation is the addition of an engineering plastic bushing inside the existing steel bushing structure — not simply adding a plastic component, but a fully re-engineered chain optimized through multiple rounds of testing and dimensional refinement.
* PNB Side-Bow Chain — Dual-Layer Bushing Cross-Section
MCC validated the following during development:
- Component dimension adjustment — ensuring precise fit between plastic and steel bushings
- Chain strength testing — confirming load capacity meets application requirements after structural changes
- Wear resistance testing — simulating long-term operation conditions
- Side-bow performance verification — ensuring lateral flexibility and bend angle remain within original specifications
After several rounds of testing, the final design holds up on all three fronts — side-bow flexibility, wear resistance, and overall chain strength.
3 Key Advantages of the PNB Side-Bow Chain
1. Reduced Lubrication Requirements — Less Oil, Less Mess
In most real-world conveyor setups, keeping up with lubrication schedules is harder than it sounds — especially when equipment runs around the clock or is tucked into tight spaces.
The material itself does some of the work. Engineering plastic runs with less friction than steel, so the chain doesn’t need as much lubrication to stay in good shape. Less oil consumption, less cleanup, fewer maintenance stops.
For facilities where cleanliness matters — packaging lines, food processing, or anywhere with strict housekeeping standards — this isn’t a minor detail. It’s one of the more practical reasons customers make the switch.
2. Improved Wear Resistance and Longer Chain Life
Real-world testing backs this up. Compared to standard side-bow chains run under the same conditions, the PNB version shows noticeably less wear over time — which adds up to longer replacement intervals and lower spare parts costs.
* 63SB(PNB) shows significantly lower elongation than standard 63SB over 10 hours of wear testing
3. Lower Operating Noise
The plastic bushing sits between metal components and dampens the friction noise that typically comes with steel-on-steel contact — a difference that’s especially noticeable on packaging lines or in food processing environments.
Real-World OEM Application Case Study
A packaging line customer came to us having dealt with the same frustrations for a while.
Lubricant was being thrown off the chain during operation and contaminating nearby products. Humidity in the facility accelerated the problem — moisture stripped away lubrication faster than maintenance schedules could keep up. Getting hands on the equipment regularly wasn’t easy either, given the complexity of the line layout.
After switching to the PNB Side-Bow Chain, things changed fairly quickly. Lubrication upkeep dropped off the weekly maintenance list, and the oil contamination issue that had been bothering them for years essentially went away. A side effect they didn’t fully anticipate — the line got noticeably quieter.
Applications & Industries
These are the applications where the PNB Side-Bow Chain tends to make the biggest difference:
| Application | Why It Fits |
|---|---|
| Curved conveyor systems | Requires high lateral flexibility and stable long-term operation |
| Packaging machinery | Oil contamination-sensitive; noise requirements are strict |
| Food & beverage conveyor lines | High cleanliness standards; lubricant contamination risk is unacceptable |
| Automated conveyor systems | Limited maintenance access; minimizing downtime is critical |
| Humid or harsh environments | Conventional lubrication is unreliable; self-lubricating design is essential |
FAQ
Q: Can the PNB Side-Bow Chain run completely without lubricant?
A: Not entirely — but that’s not really the point. Most customers find they can stretch their lubrication intervals significantly, and in lighter-duty applications, some have moved away from regular oiling altogether. That said, if your line runs at high speed or under heavy load, a little lubrication still goes a long way toward protecting chain life. When in doubt, reach out to us with your application details and we can give you a straight answer.
Q: Does the PNB Side-Bow Chain maintain the same side-bow angle as standard chains?
A: Yes. MCC conducted full side-bow performance verification during development to confirm the bend angle and lateral flexibility meet original specifications.
Q: Is custom sizing or pitch available?
A: MCC offers multiple pitch options and can evaluate custom configurations based on your equipment requirements. Please provide your specifications when reaching out.
Q: What industries benefit most from this chain?
A: The PNB Side-Bow Chain is especially valuable in food processing, packaging, pharmaceuticals, and any industry where lubricant contamination or maintenance access is a concern.
Conclusion
If lubrication upkeep, oil contamination, or chain noise has been a recurring problem on your line, the PNB Side-Bow Chain is worth a closer look. It’s not a reinvention of the side-bow chain — just a quieter, cleaner, lower-maintenance version of one that’s already proven in the field.
→ Contact MCC to Request PNB Side-Bow Chain Specifications & Pricing
