INA GRAE30-NPP-B 30x62x35.8 Radial Insert Ball Bearing

INA GRAE30-NPP-B 30x62x35.8 Radial Insert Ball Bearing with Eccentric Locking Collar

INA GRAE30-NPP-B, currently identified by Schaeffler as GRAE30-XL-NPP-B, is a radial insert ball bearing with a 30 mm bore and 62 mm spherical outside diameter. The bearing has an extended inner ring and is secured to the shaft by an eccentric locking collar. The NPP configuration provides lip sealing on both sides.

INA GRAE30-NPP-B - Characteristics

GRAE30-NPP-B is not a conventional 30x62 mm deep groove ball bearing. It is a radial insert ball bearing designed to operate in a compatible bearing housing with a spherical seat.

The spherical outside surface allows the bearing insert to align within the housing, compensating for initial shaft-to-housing misalignment. This self-aligning function occurs between the bearing outer ring and housing seat rather than through internally self-aligning raceway geometry.

INA GRAE30-NPP-B Dimensions

According to Schaeffler technical data:

d - Bore Diameter: 30 mm
Dsp - Spherical Outside Diameter: 62 mm
B - Inner Ring Width: 23.8 mm
C - Outer Ring Width: 18 mm
B1 - Overall Width with Locking Collar: 35.8 mm
S - Characteristic Distance: 9 mm
d3 - Diameter: 37.4 mm
Mass: approximately 0.32 kg

The commercial dimension 30x62x35.8 mm is therefore useful for product identification, but technically the 35.8 mm value represents B1, the overall width including the locking collar. The inner ring width B is 23.8 mm.

Bearing Construction

INA GRAE30-NPP-B has a spherical outer ring surface and an inner ring extended on one side. This construction is specifically intended for bearing unit arrangements.

The spherical outer surface works with the corresponding spherical housing seat. This allows the complete insert to adjust its angular position in the housing when compensating for initial alignment errors.

The bearing should therefore not be identified only by its 30 mm bore and 62 mm outside diameter when selecting a replacement.

Eccentric Locking Collar

The bearing is secured to the shaft using an eccentric locking collar. The collar interacts with the eccentric extension of the inner ring and provides mechanical fixation on the shaft.

This locking principle is a key identification parameter. Another 30 mm radial insert bearing using grub screws directly in the inner ring or another locking system is not automatically interchangeable with GRAE30-NPP-B.

What Does NPP Mean?

The NPP configuration identifies sealing on both sides of the bearing. The GRAE series uses lip seals designed to retain lubricant and restrict contaminants from entering the rolling contact area.

The sealing system is particularly relevant when comparing GRAE30-NPP-B with open or differently sealed insert bearing designs.

What Does B Mean?

In the GRAE series, the B suffix identifies the spherical outside surface of the bearing outer ring.

This spherical geometry allows the bearing insert to work with a compatible housing and provides the self-aligning capability of the complete bearing unit.

It should not be confused with dimensional symbol B = 23.8 mm, which describes the inner ring width.

GRAE30-NPP-B vs GRAE30-XL-NPP-B

GRAE30-NPP-B is the established older INA designation. Schaeffler's current product designation is GRAE30-XL-NPP-B.

The XL suffix identifies the current X-life version. Including both designations on the product page improves technical identification for maintenance departments working with older documentation while retaining the current Schaeffler reference.

Load Ratings

Schaeffler specifies the following ratings for GRAE30-XL-NPP-B:

Basic Dynamic Load Rating Cr: 19.5 kN
Basic Static Load Rating C0r: 11.3 kN
Fatigue Load Limit Cur: 0.48 kN

These values refer to the exact bearing reference and are more useful for technical selection than assuming load capacity from the 30x62 mm dimensions alone.

Selection and Interchangeability

When selecting a replacement for INA GRAE30-NPP-B, verify:

Bearing Type: Radial insert ball bearing
Bore d: 30 mm
Spherical Outside Diameter Dsp: 62 mm
Inner Ring Width B: 23.8 mm
Outer Ring Width C: 18 mm
Overall Width B1: 35.8 mm
Outer Ring Surface: Spherical
Inner Ring: Extended on one side
Shaft Fixing: Eccentric locking collar
Sealing: NPP, lip seals on both sides

Matching only the 30 mm bore and 62 mm outside diameter does not establish complete interchangeability.

Technical Specification

Manufacturer: INA / Schaeffler
Previous Designation: GRAE30-NPP-B
Current Designation: GRAE30-XL-NPP-B
Bearing Type: Radial insert ball bearing
Bore Diameter d: 30 mm
Spherical Outside Diameter Dsp: 62 mm
Inner Ring Width B: 23.8 mm
Outer Ring Width C: 18 mm
Overall Width B1: 35.8 mm
Outer Ring Surface: Spherical
Inner Ring: Extended on one side
Shaft Fixing: Eccentric locking collar
Sealing: NPP, lip seals on both sides
Basic Dynamic Load Rating Cr: 19.5 kN
Basic Static Load Rating C0r: 11.3 kN
Fatigue Load Limit Cur: 0.48 kN
Mass: approximately 0.32 kg

FAQ

What are the dimensions of INA GRAE30-NPP-B?

The bearing has d = 30 mm, Dsp = 62 mm, B = 23.8 mm, C = 18 mm and B1 = 35.8 mm.

Is INA GRAE30-NPP-B a 30x62x35.8 mm bearing?

Yes, 30x62x35.8 mm is a useful commercial dimension. Technically, however, 35.8 mm is dimension B1, representing the overall width including the locking collar. B is 23.8 mm.

What type of bearing is GRAE30-NPP-B?

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

How is INA GRAE30-NPP-B fixed to the shaft?

It uses an eccentric locking collar to secure the bearing inner ring to the 30 mm shaft.

What does NPP mean?

NPP identifies the lip sealing arrangement on both sides of the bearing, helping retain lubricant and restrict contamination.

What is the difference between GRAE30-NPP-B and GRAE30-XL-NPP-B?

GRAE30-NPP-B is the established older designation. GRAE30-XL-NPP-B is the current Schaeffler designation, with XL identifying the X-life version.

Can a standard 30x62 bearing replace GRAE30-NPP-B?

No. The spherical outer ring, extended inner ring, eccentric locking collar, B1 dimension and sealing configuration must also be compatible.

AI Overview

INA GRAE30-NPP-B, currently GRAE30-XL-NPP-B, is a radial insert ball bearing for a 30 mm shaft with a 62 mm spherical outside diameter. It features an eccentric locking collar, extended inner ring and NPP lip seals on both sides. Dimensions include B = 23.8 mm, C = 18 mm and B1 = 35.8 mm.