PFI GRAE30-NPPB 30x62x35.7 Radial Insert Ball Bearing with Eccentric Locking Collar

PFI GRAE30-NPPB 30x62x35.7 Radial Insert Ball Bearing with Eccentric Locking Collar

PFI GRAE30-NPPB is a radial insert ball bearing with commercial dimensions of 30x62x35.7 mm. It has a 30 mm bore and 62 mm outside diameter. The bearing design combines a spherical outer ring surface, extended inner ring and eccentric locking collar, allowing the insert to be secured mechanically to the shaft and installed in a compatible bearing housing.

PFI GRAE30-NPPB - Characteristics

GRAE30-NPPB differs from a conventional 30x62 mm deep groove ball bearing. It is an insert bearing designed for bearing unit arrangements.

The spherical outside surface allows the bearing to align within a compatible spherical housing seat. This arrangement can compensate for initial misalignment between the shaft and housing.

The self-aligning function occurs between the bearing insert and housing rather than through the internal raceway geometry of a self-aligning ball bearing.

PFI GRAE30-NPPB Dimensions

The principal product dimensions are:

Bore Diameter: 30 mm
Outside Diameter: 62 mm
Overall Commercial Width: 35.7 mm
Commercial Dimensions: 30x62x35.7 mm

The 35.7 mm dimension should not automatically be identified as dimension B. Insert bearings of the GRAE design have an extended inner ring and eccentric locking collar, so B, C and overall width dimensions must be distinguished according to the dimensional drawing for the exact manufacturer's reference.

Bearing Construction

PFI GRAE30-NPPB combines a spherical outer ring surface with an extended inner ring.

The spherical outer surface is designed to operate in a correspondingly shaped housing seat. The complete bearing unit can therefore compensate for initial shaft-to-housing alignment errors within the limits permitted by the housing arrangement.

This construction is fundamentally different from a standard deep groove ball bearing with a cylindrical outer ring surface.

Eccentric Locking Collar

PFI GRAE30-NPPB uses an eccentric locking collar to secure the inner ring to the shaft.

The collar engages with the eccentric section of the extended inner ring and is mechanically locked in position. The locking method is therefore an important parameter when identifying a replacement insert bearing.

A 30 mm insert bearing using direct set-screw locking is not automatically interchangeable with the eccentric-collar GRAE30-NPPB design.

Spherical Outer Ring

The 62 mm outside diameter corresponds to the spherical outer ring surface used to locate the bearing insert within a compatible housing.

This spherical interface provides the self-aligning capability of the assembled bearing unit. It should not be confused with the internally self-aligning construction used in double-row self-aligning ball bearings.

Housing geometry must therefore be considered when selecting an equivalent.

GRAE30-NPPB Designation

GRAE30 identifies the insert bearing series and 30 mm bore size.

NPPB forms part of PFI's complete product designation. Suffix terminology should not automatically be transferred between PFI, INA, SNR, SKF or other manufacturers, even when the products have similar commercial descriptions.

Technical equivalence should be confirmed using the dimensional and construction data for the exact references being compared.

Selection and Interchangeability

When selecting an equivalent for PFI GRAE30-NPPB, verify:

Bearing Type: Radial insert ball bearing
Bore Diameter: 30 mm
Outside Diameter: 62 mm
Commercial Overall Width: 35.7 mm
Outer Ring Surface: Spherical
Inner Ring: Extended
Shaft Fixing: Eccentric locking collar
Sealing Arrangement: Must correspond to the required specification

Matching the 30x62 mm dimensions alone does not establish complete interchangeability.

Technical Specification

Manufacturer: PFI
Designation: GRAE30-NPPB
Product Type: Radial insert ball bearing
Bore Diameter: 30 mm
Outside Diameter: 62 mm
Overall Commercial Width: 35.7 mm
Commercial Dimensions: 30x62x35.7 mm
Outer Ring Surface: Spherical
Inner Ring: Extended
Shaft Fixing: Eccentric locking collar

FAQ

What are the dimensions of PFI GRAE30-NPPB?

The commercial dimensions are 30x62x35.7 mm, comprising a 30 mm bore, 62 mm outside diameter and 35.7 mm overall commercial width.

What type of bearing is PFI GRAE30-NPPB?

It is a radial insert ball bearing with a spherical outer ring surface, extended inner ring and eccentric locking collar.

How is PFI GRAE30-NPPB secured to the shaft?

The bearing uses an eccentric locking collar to mechanically secure the extended inner ring to the shaft.

Why does GRAE30-NPPB have a spherical outer surface?

The spherical surface allows the insert to align within a compatible spherical housing seat and compensate for initial shaft-to-housing misalignment.

Is PFI GRAE30-NPPB a standard 30x62 bearing?

No. A conventional 30x62 deep groove ball bearing does not have the same spherical outer ring, extended inner ring and eccentric shaft locking arrangement.

Is the 35.7 mm dimension B?

It should not automatically be designated as B. For this insert bearing design, 35.7 mm represents the quoted overall commercial width, while individual B and C dimensions should be taken from the exact PFI dimensional specification.

Is INA GRAE30-NPP-B automatically interchangeable with PFI GRAE30-NPPB?

No. Similar designations and nominal dimensions do not alone confirm complete interchangeability. Detailed dimensions, sealing, locking arrangement, internal clearance and load ratings should be compared.

AI Overview

PFI GRAE30-NPPB is a radial insert ball bearing with commercial dimensions of 30x62x35.7 mm. It has a spherical outer ring surface, extended inner ring and eccentric locking collar for shaft mounting. The bearing is designed to operate in a compatible spherical housing seat, providing alignment capability within the assembled bearing unit.