KGU 22318 CCW33 Spherical Roller Bearing
Another unique feature is its self-aligning capability. In heavy-duty equipment, intense vibrations or shaft deflection under load are inevitable. The KGU 22318 bearing is designed much like a human joint: if the machine's shaft deviates slightly or misaligns due to stress, the rollers simply glide within the outer ring, compensating for the angle internally. This prevents any excess pressure from damaging the shaft or the bearing housing, keeping your machine running smoothly without seizure.
10022080119
Request a quote
Product Detail
Heavy-Duty Spherical Roller Bearing 22318 CCW33 KGU Brand | The Titan of Load-Bearing for 90mm Shafts
This comprehensive guide is prepared for plant managers, purchasing officers, and maintenance technicians who need an unbreakable, high-performance bearing for their heavy machinery. We have detailed every technical aspect, physical dimension, and installation tip in clear, straightforward language—stripping away the confusing jargon—to ensure you choose the perfect component for your production line with complete confidence.
What is the 22318 KGU Bearing, and Why is it Called a Heavy-Load Titan?
In large-scale industrial sectors—like steel mills, cement plants, mining, rock crushers, and asphalt production—machinery operates under relentless pressure, handling hundreds of tons of metal, rock, or raw materials around the clock. Using standard ball bearings in such environments is a recipe for disaster. Why? Because standard ball bearings rely on tiny, point-contact balls that shatter or deform instantly under continuous heavy shocks and crushing weights.
This is where the 22318 CCW33 double-row spherical roller bearing by KGU takes center stage. The "223" in its designation signifies the "Heavy Series" of spherical bearings. This means the rollers inside are significantly larger, thicker, and more robust than the standard 222 or 213 series. The walls of this bearing are incredibly thick, designed to withstand extreme forces. These barrel-shaped rollers rest against the inner and outer rings along wide lines, distributing the machine's weight across a large surface area of compressed steel, ensuring damage-free operation.
Another unique feature is its self-aligning capability. In heavy-duty equipment, intense vibrations or shaft deflection under load are inevitable. The KGU 22318 bearing is designed much like a human joint: if the machine's shaft deviates slightly or misaligns due to stress, the rollers simply glide within the outer ring, compensating for the angle internally. This prevents any excess pressure from damaging the shaft or the bearing housing, keeping your machine running smoothly without seizure.
A Vital Distinction: Why This Model Lacks a 'K'
One of the most important things to know when ordering this part is that it features a Cylindrical (Straight) Bore. Unlike models marked with a "K," which have a tapered (conical) inner hole, the 22318 CCW33 KGU has a perfectly straight, parallel cylindrical bore with a precise 90mm diameter.
This means that for your procurement and installation process:
- No Adapter Sleeves Needed: You do not need to purchase adapter sleeves, lock nuts, or locking washers to install this bearing.
- Direct Installation: This bearing mounts directly onto precision-machined, stepped shafts with a 90mm diameter.
- Direct Torque Transfer: Because it sits directly on the shaft without intermediaries, it provides superior rotational accuracy and minimal wobble at varying speeds.
Decoding the Marks on the 22318 CCW33 Bearing
All the technical specs of this industrial giant are packed into its alphanumeric code. Let’s break down each part in plain English:
- 223 (Heavy Series): Represents a wide, double-row spherical roller bearing with thick rollers and exceptionally high load-bearing capacity (significantly stronger than 222 or 213 series).
- 18 (Bore Size): In standard bearing logic, multiplying 18 by 5 gives you the inner diameter: 90 millimeters.
- CC (Optimized Steel Cage): Indicates the use of two separate window-type pressed steel cages. This structure is built without a central inner-ring flange, giving the rollers more freedom of movement and minimizing friction-induced heat.
- W33 (Outer Ring Lubrication): Features an annular groove and three oil/grease holes on the outer ring, allowing you to replenish grease effortlessly without disassembling the machine.
Technical Specs & Dimensions at a Glance
To ensure a perfect fit for your shaft and housing, check the dimensions in the table below:
Where is this Bearing Used?
Due to the massive resilience of the 223 series, the KGU 22318 is installed in the most critical parts of the production line—the points where a bearing failure would shut down the entire factory:
- Mining Vibrating Screens: Where constant, rapid oscillations would disintegrate a weaker component within days.
- Jaw and Cone Crushers: Absorbing the crushing impact forces of mineral rock processing.
- Heavy Industrial Gearboxes: Handling input/output shafts with immense torque.
- Mining Conveyor Drums: Carrying tons of material load continuously without overheating.
- Giant Industrial Fans & Blowers: Maintaining stable, high-speed rotation in hot and dusty conditions.
Installation Guide for Cylindrical Bore Bearings
Because this bearing requires a tight fit on the shaft, incorrect installation can damage the rollers. Please observe these simple practices:
- NEVER use a hammer: Striking the rings or rollers with a metal hammer will instantly cause micro-fractures or dents on the raceway. This hidden damage creates noise and leads to premature failure.
- Use an Induction Heater or Hot Oil Bath: The best way to mount this on a 90mm shaft is to heat the bearing uniformly to roughly 100°C–110°C. This expands the inner bore, allowing the bearing to slide gently onto the shaft until it hits the shoulder, without needing any force.
- Ensure Complete Seating: Ensure the back edge of the bearing sits flush against the shaft shoulder, without any tilting or gaps.
- Pre-Clean the Shaft: The shaft must be spotless—free of burrs, rust, or grit—and lightly oiled before mounting.
Lubrication & Maintenance Guide
The greatest enemy of industrial bearings is poor lubrication. The W33 feature on KGU bearings simplifies this for your maintenance team:
- Use High-Quality EP Grease: Under heavy loads, always use Lithium Complex-based greases with Extreme Pressure (EP) additives to ensure the protective oil film doesn't break.
- The Golden Rule of Filling: Pack the internal space between the rollers 100%, but fill the housing cavity only to 40%–50%. Over-filling the housing prevents heat dissipation, causing temperature spikes and rapid grease degradation.
- Inject via W33: Always place your grease gun nozzle on the lubrication fitting connected to the W33 groove. This pushes fresh grease directly through the rollers, purging the old, spent grease out the sides.
Frequently Asked Questions
Q: What is the main difference between 22318 and 22218?
Both have a 90mm bore, but the 22318 is substantially larger (190mm OD vs 160mm OD) and wider. The 22318 is much more robust and built for significantly higher load capacities than the 22218.
Q: Should I buy an H 2318 adapter sleeve for this?
No. This model does not have a "K" in its code; it has a straight bore and mounts directly onto a 90mm shaft. Adapter sleeves are only needed for tapered bore models (like 22318 CCK/W33).
Q: Why is KGU a reliable choice for industry?
KGU uses high-quality alloy steels, precision-ground raceways, and durable steel cages, offering excellent longevity and high cost-efficiency compared to much more expensive premium brands.
Buy Genuine 22318 CCW33 KGU Bearings with Guaranteed Quality
If you are looking to equip your production lines with durable, resilient components that withstand the toughest work conditions, our trading experts are ready to offer free technical advice and fast shipping across the country.
Get Quote & Consultation at KGICO.co