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Reducing Contamination Risks With Hygienic Bearing Housings

When you’ve spent over a decade inside food-production plants, you start noticing something: the components most likely to cause hygiene failures are rarely the biggest, most visible ones. They’re the unglamorous parts - the bolts, the seals, the welds, and very often, the bearing housings mounted on the machines.

I’ve walked countless lines across dairy, meat, bakery, and ready meal plants, and what’s striking is how often the cleaning strategy, uptime performance, or risk profile of a machine can be traced back to this one small component.

It collects water. It traps debris. It leaks grease and sooner or later, it contributes to either a mechanical failure or a contamination incident.

That’s why at NGI we put so much focus on hygienic bearing housings. They’re not accessories. They’re not “upgrades.” They’re control points - ones that directly impact uptime, cleaning efficiency, and the overall cost of running a machine.

- Written by Austin Davis, Category Manager – Bearings, NGI

This article breaks down why hygienic bearing housings matter, what contamination risks they eliminate, and how they influence Total Value of Ownership (TVO) for both OEMs and end users.

”A hygienic bearing housing isn’t just about keeping contaminants out - it’s about keeping production running. Hygiene and uptime are inseparable.”

Austin DavisCategory Manager, NGI
Why Traditional Bearing Housings Create Contamination Risks

Why Traditional Bearing Housings Create Contamination Risks

Most standard pillow block bearings, flange bearings, bearing blocks, mounted bearings, and other traditional bearing units were never designed for high pressure washdown - especially not for the demands placed on modern washdown bearings or food grade bearings.

The typical bearing and housing assembly includes flat surfaces, cavities, and exposed areas that are nearly impossible to clean efficiently.

1. Water ingress
Cleaning pressure forces water past the seals of traditional ball bearings, radial bearings, and insert bearings, leading to diluted grease and premature failure.

2. Exposed bolt areas
Threaded zones and unprotected fasteners are notorious hotspots for bacterial buildup.

3. Non-hygienic geometry
Flat surfaces and sharp transitions trap moisture. This is common with traditional flange-mounted bearings and older plummer block housings.

4. Lubrication leakage
Excess or washed-out grease from shaft bearings introduces both hygiene and safety risks - especially in dairy, protein, and RTE environments.

Read moreRead less

Total Value of Ownership: Why Hygienic Design Matters

One of the biggest misconceptions I encounter is the idea that hygienic components are “more expensive.” The truth is that price is the least important part of the equation for any OEM or brand owner focused on long-term efficiency.

What truly matters is Total Value of Ownership - the relationship between machine cost, output, efficiency, uptime, sanitation needs, and risk prevention.

Design That Drives Performance

When a bearing assembly sits inside a hygienic housing, the entire system becomes easier to clean and more resistant to washdown ingress.

And hygienic design directly influences every part of that equation:


1. Hygienic design → efficient cleaning
A machine that cleans faster and more effectively delivers:

  • reduced cleaning intervals and shorter sanitation cycles
  • lower water consumption
  • reduced chemical/detergent usage
  • fewer sanitation labor hours

 

2. Efficient cleaning → extended production uptime
Cleaning time is downtime. Every saved minute directly increases production capacity. Even a highly productive line becomes inefficient if it must be cleaned more often or more aggressively to compensate for non-hygienic components.

3. Better cleaning → fewer positive swabs
Poorly designed bearing housings are common sources of recurring micro hotspots. Hygienic housings reduce:

  • repeated cleaning loops
  • additional chemical cycles
  • lost production hours
  • microbiological risk
Read moreRead less

”When you design for hygiene, you’re not just improving a component. You’re improving the customer’s yield, uptime, and risk profile - and that’s what wins projects.”

Austin DavisCategory Manager, NGI

How Hygienic Bearing Housings Eliminate Contamination Risks

To eliminate the failure points found in traditional bearing housings, bearing flanges, and older bearing-with-housing designs, NGI’s hygienic solutions follow five core principles:

  • Fully sealed, lubricated for life bearings: Including stainless steel and ceramic bearing options.
  • Self-draining geometry: No flat surfaces, no pooling water, no residue zones.
  • Enclosed bolt areas: No exposed threads or cavities around bolts.
  • Washdown-optimized materials: High-performance polymers and corrosion-resistant stainless steel.
  • Compliance with EHEDG, USDA, and 3-A: Hygiene is built in - not added later.
  • Superior surface finish: Reducing micro-organism adhesion.

Choosing the Right Hygienic Bearing Housing for Your Application

Every OEM design is different, and choosing the right bearing unit or mounted bearing has a major impact on load capacity, vibration management, cleanability, and long term performance.

Rather than repeating every technical nuance, here’s how I typically guide customers when deciding which housing type fits their application:

• 2-Bolt Hygienic Housing: Ideal for orientation flexibility and reduced footprints are desired

• 3 Bolt Hygienic Housing: With an offset design the 3-bolt flange works well on conveyor ends when space is limited

• 4 Bolt Hygienic Housing: The strongest option. Used for mixers, drum machines, and heavy conveyors where high loads or load symmetry is needed.

• 2 Bolt Hygienic Pillow Block Housing: The hygienic version of a classic pillow block. Best for conveyors, slicers, and general horizontal shaft equipment with moderate loads.

• Tapped Base Pillow Block: A clean space saving option ideal for tight transfers or take-up/tensioning applications

 

If you want deeper technical guidance, you can find it in my earlier NGI article: Choosing the Right Hygienic Bearing House: 5 Types Explained


I still refer customers to this guide regularly because it provides the full engineering overview behind each housing family. These aren’t theoretical guidelines - they’re patterns I’ve seen repeatedly in real installations.

Why It Matters

If your equipment runs in high-moisture or washdown environments, the bearing housing is too important to overlook. It affects hygiene, maintenance, uptime, and ultimately the yield of the entire machine.

Choosing the right hygienic housing - 2 bolt, 3 bolt, 4 bolt flanges, traditional or tapped base pillow blocks - is one of the simplest and most impactful ways to reduce contamination risk and improve long-term performance.

Clean design isn’t an upgrade - it’s an operational advantage. And the bearing housing is one of the simplest places to start.

If you’re unsure which variant fits your need or want to review shaft sizes, loads, or compatibility, my team and I are always ready to help. Just reach out.


– Austin Davis, Category Manager, NGI

 

Austin Davis, Global Category Manager – Bearings United States, NGI

Learn more about the author, Austin Davis: 

I have over 10 years of experience in technical sales and product management, primarily in the food and beverage industry. At NGI, I lead the global development of our non-leveling hygienic components, working closely with OEMs, end-users, and distributors to bring practical, high-performance solutions to market.

My background includes roles in sales engineering and territory management, with a focus on bearings, sealing solutions, and hygienic equipment. I’ve supported customers across North America, helping them solve technical challenges, optimize equipment performance, and meet strict hygiene requirements. I'm driven by data, customer insight, and a strong belief that product innovation must serve real-world application needs.

 

If you want to see our assortment of bearing houses - click below

Hygiene is in every touchpoint

Certified hygienic components are a strong start, but true hygiene comes from a complete system approach.

Every part of your production line and environment must be evaluated to eliminate weak points that could compromise cleanliness.

Hygienic design = Yield improvement

Our ROI calculators help you see how quickly our components pay off through savings in power, water, and maintenance. they also shows the sustainability impact of your choices.

We’ve prioritized precision over simplicity to give you real, decision-ready data. Try it now!

ROI calculator bearing houses

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Looking for Bearing Houses or Related Components?

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If you want to reduce contamination risks, improve uptime, or transition away from lubrication‑intensive designs, we’re here to help.

Contact our team to review your specific shaft size, load profile, or washdown environment.

Many of our components are in stock and ready to ship, with lead times across Europe typically just 3–4 days.

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