Bearing choice matters when dealing with force from more than one direction. Some loads push sideways. Others push along the shaft. Many applications need to handle both.
That’s where needle bearings come in. They support radial loads in tight spaces. But when axial force is also present you need more than a standard needle bearing.
You can either use two separate bearings or one combined bearing. Each setup works. But one is often simpler.
Let’s dive into the details below.

What Combined Needle Bearings Are

A combined needle bearing is one part that handles two jobs. The needle rollers support radial loads. The thrust element handles axial loads. Both parts come in one unit.
This design keeps things simple. There’s no need to align two different bearings. Best of all it takes up less space and installs faster.
You’ll find these in lift systems and small motors. Anywhere space is tight and the system needs both support directions.

What Separate Bearings Are

You can also use two separate bearings. One needle bearing for radial loads. One thrust bearing for axial loads. This gives more flexibility.
You can choose different sizes. You can mix bearing types. This can help if your system has high loads in one direction.
But this setup takes more space. It needs careful alignment. More time to install. More parts to maintain. And more chances for something to go wrong.

Why Combined Bearings Are a Good Choice

Most machines don’t need the extra complexity. Combined bearings do the job well. They save space. They save time. They reduce error.
One part means fewer tools. Fewer steps during assembly. Fewer things to check later.
They are also easier to stock. Easier to replace. Easier to design around.
If the loads are moderate and the speeds are within normal range a combined bearing will work just fine.

When Separate Bearings Still Make Sense

Sometimes you do need more control. If the axial load is very high a dedicated thrust bearing may be stronger. If your system runs hot or fast you may want to choose each bearing based on material or design.
Some systems need custom thrust support. In those cases separate bearings are better. They offer more options. But they also add cost and complexity.
For most setups though the benefits don’t outweigh the extra work.
Where Combined Bearings Are Used
These bearings show up in all kinds of gear. Forklifts. Power tools. Pumps. Gear reducers. Anything with tight space and mixed loads.
In these jobs keeping the system compact matters. You don’t want to waste room or time. Combined bearings allow the machine to remain compact and straightforward without compromising performance.
Performance and Maintenance
Combined needle bearings hold up well. They stay aligned. Many are sealed and pre-lubricated. That cuts down on maintenance.
They don’t carry extreme loads. They aren’t built for ultra-high speeds. But for most jobs they’re more than strong enough.
Always check the load and speed ratings to ensure compatibility. Ensure the bearing matches the job requirements. If it does it should last a long time with little trouble.
Most machines need to do more with less space. That’s why combined needle bearings are often the better choice. They’re small. They’re easy to use. They do two jobs in one.
Separate bearings have their place. But unless your system demands them, they can just add hassle.
If you want less guesswork and a cleaner design, go with a combined bearing.
NSAR Bearings offers reliable combined needle bearings for all kinds of equipment. We also support OEM customization if you need a specific fit. Visit NSAR Bearings to explore our full product line. Let us help you find the right bearing for your machine.