Oct . 20, 2025 12:55 Back to list

Conveyor Bearing Housing: Sealed, Steel, Heavy-Duty

A Field-Level Look at Conveyor Bearing Housings, Seals, and What Actually Matters

If you run belts in dust, mud, or salty air, the humble conveyor bearing housing determines whether your shift is uneventful—or an expensive stop-start repair day. Over the last two years I’ve seen a clear trend: plants are pushing for smarter sealing around standard 62/63-series bearings, rather than over-spec’ing the entire housing. It’s practical, cheaper, and honestly, it works when done right.

What’s changing on the floor

Three shifts, abrasive fines, splash zones—this is reality. Many customers say the fastest wins come from upgraded seals matched to standard bearings inside a robust conveyor bearing housing. Nylon composite seals (often called TK-type seals) have been quietly replacing all-metal covers in mines, quarry transfer points, and grain terminals. Surprisingly durable, and they don’t deform as easily if installation is a bit, well, enthusiastic.

Product snapshot: TK Seal for harsh-duty housings

Made in East Outer Ring Road, Yanshan County, Cangzhou, Hebei, China, the TK Seal is a nylon sealing element that pairs with standard 62/63-series bearings inside a conveyor bearing housing. It’s positioned for dustproof/waterproof performance in rough environments. Below is a concise spec view I’ve compiled.

Item	Details (≈ real-world use may vary)
Product Name	TK Seal
Material	Nylon (engineering grade)
Applicable Bearings	6204, 6205, 6305, 6306, 6307, 6308, 6309, 6310, etc.
Function	Dustproof, waterproof for bad working environments
Indicative Temp Window	around −20°C to +90°C (check application)

How it’s made and verified

Materials: Nylon pellets molded to tight groove tolerances, then trimmed and inspected.
Methods: Injection molding, post-machining of sealing lips where required, press-fit validation into the conveyor bearing housing.
Testing (typical): Water spray ingress per IEC 60529 (targeting IP66–IP67 when systemized), salt-spray exposure ≈ 96 h per ASTM B117 on assemblies, and rotational drag/temperature rise checks.
Service life: Bearing L10 life still governed by ISO 281; seals help maintain grease integrity to approach design life under CEMA-duty loads.
Industries: Mining/quarry, aggregates, cement, ports, grain, recycling, fertilizers—anywhere splash and fines are constant.

Vendor landscape (quick take)

Vendor	Strengths	Watch-outs	Lead Time ≈	Certs
Aohua (Cangzhou, Hebei)	Focused on idlers/seals; match to common 62/63 series; practical pricing.	Confirm IP rating at assembly level, not seal alone.	2–4 weeks	ISO 9001 (typ.)
Regional Distributor	Fast availability, mixed brands.	Spec consistency varies by lot.	Stock to 1 week	Varies
Local Machine Shop	Custom housings and adapters.	Seal material choice may be limited.	1–3 weeks	Shop QA

Real-world usage and a quick case

Mining transfer tower (wet, abrasive, 24/7). After switching to TK-type nylon seals in the existing conveyor bearing housing, one maintenance team reported grease change intervals extending from monthly to quarterly, with noticeably less washout after monsoon weeks. To be honest, that’s the pattern I hear most: not miracle results, but tangible reductions in ingress and downtime.

Selection tips

Match seal to bearing series (6204…6310 are common) and verify groove/housing geometry.
Ask for ingress test summaries (IEC 60529) and any salt-spray or mud-slurry trials.
Check rotational drag and temperature rise at belt speed—small but not trivial.
Confirm certifications and QA traceability; ISO 9001 is a baseline, not a guarantee.

Customer note: “Installation was forgiving; once seated, the seal stayed put and we didn’t see the usual black paste forming after washdowns.”