PFI RA 102 RRB 28.575x62x35.7 - Insert Ball Bearing

PFI RA 102 RRB 28.575x62x35.7 - Insert Ball Bearing

PFI RA 102 RRB is an insert ball bearing with a spherical outer surface and eccentric locking collar, designed for a 28.575 mm (1 1/8 inch) shaft. Its principal dimensions are 28.575 mm bore, 62 mm outside diameter and approximately 35.7 mm overall width. The RA102RRB design is commonly used in agricultural and industrial bearing units where secure shaft locking and accommodation of minor initial misalignment are required.

Technical Specifications - PFI RA102RRB

Manufacturer: PFI
Designation: RA102RRB / RA 102 RRB
Product type: Insert ball bearing
Bearing design: Single-row ball bearing insert
Bore diameter d: 28.575 mm
Bore in inches: 1 1/8 inch
Outside diameter D: 62 mm
Overall width B1: approx. 35.7 mm
Inner ring width B: approx. 23.8 mm
Outer ring width C: 18 mm
Outer ring surface: Spherical
Bore: Cylindrical
Shaft locking: Eccentric locking collar
Rolling elements: Balls
Sealing: Sealed on both sides
Application group: Agricultural and industrial bearing units

Dimensions 28.575x62x35.7 mm

The key identification dimensions are:

d: 28.575 mm
D: 62 mm
B1: 35.7 mm
B: approx. 23.8 mm
C: 18 mm

The 35.7 mm value represents the overall width of the bearing assembly including the locking arrangement, while the outer ring itself is narrower.

These dimensions are particularly important when replacing an existing insert bearing because the bore and outside diameter alone are not sufficient to confirm interchangeability.

1 1/8 Inch Bore

The 28.575 mm bore corresponds exactly to 1 1/8 inch.

This inch-size bore is an important identification feature of the RA102RRB and makes the bearing suitable for machinery using:

Shaft diameter: 28.575 mm
Imperial shaft size: 1 1/8 inch

The imperial shaft dimension should always be checked carefully when replacing bearings in agricultural or imported machinery.

Eccentric Locking Collar

The RA..RRB design uses an eccentric locking collar to secure the bearing inner ring to the shaft.

During installation, the eccentric collar is rotated relative to the eccentric extension of the bearing inner ring and then secured. This provides positive shaft locking without requiring an interference fit between the shaft and bearing bore.

The locking method is an important feature when comparing RA102RRB with insert bearings using set-screw or adapter-sleeve locking systems.

Spherical Outer Surface

The outer ring has a spherical outside surface designed to operate in a correspondingly shaped bearing housing.

This arrangement allows the complete bearing unit to accommodate a limited amount of initial misalignment between the shaft and housing caused by installation tolerances.

The spherical outside surface does not mean that the bearing should be treated as a conventional self-aligning ball bearing. Self-alignment occurs through the interaction between the insert bearing and its matching housing seat.

Sealed Insert Bearing Design

RA102RRB is designed for use in mounted bearing arrangements where the rolling elements require protection from external contamination.

The sealing arrangement helps retain lubricant and limit the ingress of dust and other contaminants encountered in agricultural and industrial machinery.

Actual service life depends on contamination level, rotational speed, load, lubrication and operating environment.

Load Ratings

Reference catalogue data for the RA102RRB bearing design specifies approximately:

Basic dynamic load rating C: 21.6 kN
Basic static load rating C0: 11.3 kN

Load ratings should be considered together with operating speed, shaft condition, mounting method and environmental conditions when selecting the bearing.

Agricultural and Industrial Applications

PFI RA102RRB is particularly relevant to bearing arrangements used in agricultural machinery and mechanical equipment, including:

• combine harvesters
• seeders
• harvesting machinery
• agricultural conveyors
• drive shafts
• processing equipment
• agricultural implements
• industrial bearing units

The final selection should always be based on the original bearing designation and mounting dimensions.

Replacement Identification

When identifying a replacement for PFI RA 102 RRB, verify:

Brand: PFI
Designation: RA102RRB
Bore: 28.575 mm / 1 1/8 inch
Outside diameter: 62 mm
Overall width: approx. 35.7 mm
Outer surface: Spherical
Locking method: Eccentric locking collar
Bearing type: Insert ball bearing

Equivalent designation families can include RA102RRB, RA102-RRB, YET206-102, AEL206-102 and ES206-18, depending on manufacturer.

Dimensional similarity alone should not be treated as confirmation of complete interchangeability. Locking method, seal design, ring widths and housing compatibility should also be verified.

FAQ - PFI RA 102 RRB

What are the dimensions of PFI RA102RRB?
The principal dimensions are 28.575x62x35.7 mm.

What shaft diameter fits RA 102 RRB?
The bearing is designed for a 28.575 mm shaft, equivalent to 1 1/8 inch.

What type of bearing is RA102RRB?
It is an insert ball bearing with a spherical outer surface, designed for installation in a compatible bearing housing.

How is RA102RRB locked onto the shaft?
It uses an eccentric locking collar.

Why does RA102RRB have a spherical outside surface?
The spherical outer ring works with a matching housing seat to accommodate limited initial shaft-to-housing misalignment.

Is RA102RRB suitable for agricultural machinery?
Yes. This bearing design is widely associated with agricultural bearing units and machinery applications.

Is 28.575 mm an imperial dimension?
Yes. 28.575 mm equals 1 1/8 inch, which is the nominal shaft size for this bearing.