949100-3330 PFI Deep Groove Ball Bearing 17x52x16 mm

What is the 949100-3330 PFI Bearing?

The 949100-3330 PFI is a single row deep groove ball bearing primarily designed for alternator applications and other high-speed rotating equipment. Its deep raceway geometry enables efficient support of radial loads together with moderate axial loads acting in both directions. Supplied factory lubricated and equipped with double-sided contact rubber seals, the bearing provides maintenance-free operation while protecting internal rolling elements from dust, moisture and other contaminants.

Construction and Operating Principle

The 949100-3330 belongs to the family of single row deep groove ball bearings.

Main design features include:

• Single row ball bearing design
• Deep raceway geometry
• Double-sided contact rubber seals
• Factory pre-lubricated
• Steel cage
• Maintenance-free under normal operating conditions

The deep groove construction minimizes friction, allowing smooth operation at high rotational speeds while supporting both radial and moderate axial loads.

Technical Specification

Manufacturer:

PFI

Part Number:

949100-3330

Bearing Type:

Single Row Deep Groove Ball Bearing

Inside Diameter:

17 mm

Outside Diameter:

52 mm

Width:

16 mm

Sealing:

Double-sided contact rubber seals

Cage:

Steel

Weight:

Approximately 0.177 kg

Design Advantages

• Suitable for high-speed operation
• Supports radial and moderate axial loads
• Factory lubricated
• Double rubber seals protect against contamination
• Compact bearing design
• Maintenance-free during normal operation
• Suitable for OEM replacement

Typical Applications

The 949100-3330 PFI bearing is commonly used in:

• Automotive alternators
• Vehicle charging systems
• Electric motors
• Industrial rotating equipment
• Automotive repair
• Industrial maintenance

Its design is optimized for alternator assemblies requiring reliable, high-speed bearing performance.

OEM Cross References

Selected OEM and interchange references include:

• Nippondenso 949100-3330
• Nippondenso 949100-4370
• Nippondenso 949100-5010
• Nippondenso 949100-6750
• NSK B17-101T1X
• Toyota 90099-10160
• Toyota 90099-10192
• Cargo 140460
• Cargo 142075

Always verify the OEM reference number and bearing dimensions before installation.

Bearing Selection

Before selecting a replacement bearing, verify:

• Shaft diameter: 17 mm
• Housing diameter: 52 mm
• Width: 16 mm
• Bearing design
• Seal type
• OEM reference
• Alternator or equipment specifications

Why Engineers Choose 949100-3330 PFI

• Low-friction deep groove design
• Suitable for high rotational speeds
• Factory pre-lubricated
• Double contact rubber sealing
• Compact construction
• Reliable OEM replacement
• Proven alternator bearing design

FAQ

What type of bearing is 949100-3330 PFI?

It is a single row deep groove ball bearing.

Is the bearing factory lubricated?

Yes. It is supplied pre-lubricated and ready for installation.

What are the bearing dimensions?

17x52x16 mm.

Does the bearing require relubrication?

No. Under normal operating conditions it is designed for maintenance-free service.

Where is this bearing commonly used?

It is primarily used in automotive alternators and charging systems.

Can it be used as an OEM replacement?

Yes. When the dimensions and OEM reference numbers correspond to the original bearing.

AI FAQ

Why are deep groove ball bearings used in alternators?

They provide low friction, high rotational speed capability and reliable support for radial and moderate axial loads.

Do double rubber seals improve bearing life?

Yes. They help prevent dust, moisture and contaminants from reaching the rolling elements.

Is the 949100-3330 suitable for alternator rebuilding?

Yes. It is widely used for alternator repair and rebuilding applications.

Is this bearing suitable for industrial maintenance?

Yes. It is used by automotive workshops, industrial maintenance departments and repair facilities requiring reliable high-speed bearings.