INA KWVE20-B-V0-G3 Linear Recirculating Ball Bearing Carriage

INA KWVE20-B-V0-G3 is a four-row linear recirculating ball bearing carriage for INA/Schaeffler profiled rail guide systems. It is a size 20 flange-type carriage with V0 preload class and G3 accuracy class. Its verified envelope dimensions are approximately H = 30 mm, A = 63 mm and L = 71.4 mm.

INA KWVE20-B-V0-G3 - Product Characteristics

The exact designation KWVE20-B-V0-G3 identifies the carriage itself rather than a complete linear guide assembly with rail.

The carriage uses four rows of recirculating balls. During linear movement, the balls travel through the loaded raceway zones and return through internal recirculation channels in the carriage body.

This principle enables continuous linear travel along a compatible profiled guide rail, limited primarily by the rail length and system arrangement.

Key identification data:

Manufacturer / Brand: INA
Manufacturer Group: Schaeffler
Designation: KWVE20-B-V0-G3
Product Type: Linear recirculating ball bearing carriage
System Type: Profiled rail linear guide
Size: 20
Carriage Form: Flange type
Number of Ball Rows: 4
Preload Class: V0
Accuracy Class: G3
H - Height: 30 mm
A - Width: 63 mm
L - Carriage Length: 71.4 mm
Relubrication: Yes

Dimensions

For INA KWVE20-B-V0-G3, the principal envelope dimensions are:

H - Height: 30 mm
A - Overall Width: 63 mm
L - Overall Length: 71.4 mm

Unlike a conventional rolling bearing, these dimensions must not be expressed as d x D x B.

KWVE20-B-V0-G3 is a linear guide carriage, so its dimensional definition follows carriage and profiled-rail system geometry.

Four-Row Recirculating Ball Construction

The INA KWVE series uses four rows of recirculating balls.

The rolling elements circulate through closed internal paths inside the carriage. In the loaded zones, the balls transmit forces between the carriage and the profiled rail. After leaving the loaded zone, they return through internal channels to continue the circulation cycle.

This distinguishes KWVE20-B-V0-G3 from linear bushings designed to run on round shafts.

Flange-Type Carriage

KWVE20-B-V0-G3 has a flange-style carriage body.

This construction provides a wider mounting platform than a narrow block-type carriage. The overall width for this size is 63 mm, while the system height is 30 mm.

Carriage form is an important compatibility parameter and should be checked together with rail profile, mounting-hole arrangement and system height.

V0 Preload Class

The suffix V0 identifies the preload class.

For this configuration, V0 indicates no preload or only very slight preload, depending on the exact Schaeffler classification language used for the system generation.

Preload class affects carriage stiffness, running resistance and internal play.

Therefore, a carriage with another preload class should not automatically be treated as identical to KWVE20-B-V0-G3, even when the basic size and rail system are similar.

G3 Accuracy Class

The suffix G3 identifies the carriage accuracy class.

Accuracy class is a functional specification in profiled rail guide systems. It relates to geometrical running accuracy and system tolerances rather than to load capacity alone.

A KWVE20 carriage with a different G-class should therefore not automatically be treated as the same technical configuration.

Sealing and Relubrication

The exact KWVE20-B configuration is supplied with integrated sealing elements intended to restrict contaminant ingress and help retain lubricant in the raceway system.

The carriage is also relubricatable, meaning lubricant can be replenished during service.

This is important because lubrication condition directly influences running behavior, friction, wear and service life in recirculating linear guide systems.

Load Transmission

KWVE20-B-V0-G3 is part of a profiled linear guide system in which four rows of balls transmit forces between the carriage and rail.

Unlike a rotary bearing, the load acts through the carriage-rail contact system and may include:

radial forces
lateral forces
moments about the carriage axes

Available technical catalogues for this exact variant list approximately:

Dynamic Load Rating C: 13.1 kN
Static Load Rating C0: 27 kN
Static Moment M0x: 332 Nm
Static Moment M0z: 240 Nm

These are engineering selection parameters and should not be interpreted as simple universal maximum loads independent of load direction and mounting arrangement.

Meaning of KWVE20-B-V0-G3

The designation contains several important technical identifiers:

KWVE - linear recirculating ball bearing carriage

20 - size 20

B - carriage design variant

V0 - preload class

G3 - accuracy class

The complete designation should therefore be retained:

INA KWVE20-B-V0-G3

Reducing the product name to only KWVE20 removes information that may be essential for compatibility and replacement selection.

Carriage vs Complete Linear Guide Assembly

KWVE20-B-V0-G3 identifies the carriage only.

It does not automatically mean that a guide rail is included.

A complete linear guide arrangement normally consists of at least:

profiled guide rail
one or more compatible carriages

When ordering for an existing machine, the rail designation and generation should be checked separately.

Rail Compatibility

The KWVE20 carriage belongs to INA/Schaeffler size 20 profiled rail guide systems.

Compatibility should not be assumed solely from the number 20. The exact rail generation, raceway geometry, carriage design and mounting dimensions must match.

A size 20 carriage from another manufacturer is not automatically compatible with an INA rail.

Selection and Interchangeability

When selecting an alternative to INA KWVE20-B-V0-G3, compare the complete technical configuration rather than nominal size alone.

Important parameters include:

size 20 system
four-row recirculating ball design
flange carriage geometry
H = 30 mm
A = 63 mm
L = 71.4 mm
V0 preload class
G3 accuracy class
rail profile compatibility
mounting-hole geometry
load ratings
lubrication arrangement

A linear carriage from another brand with nominal size 20 should not automatically be treated as a verified replacement.

Technical Specification

Manufacturer / Brand: INA
Manufacturer Group: Schaeffler
Designation: KWVE20-B-V0-G3
Product Type: Linear recirculating ball bearing carriage
Guide Type: Profiled rail linear guide
Size: 20
Construction: Four-row recirculating ball
Carriage Form: Flange type
Rolling Elements: Balls
Ball Rows: 4
Preload Class: V0
Accuracy Class: G3
H - Height: 30 mm
A - Width: 63 mm
L - Length: 71.4 mm
Sealing: Integrated carriage sealing
Relubrication: Yes
Dynamic Load Rating C: approx. 13.1 kN
Static Load Rating C0: approx. 27 kN
Static Moment M0x: approx. 332 Nm
Static Moment M0z: approx. 240 Nm
EAN: 4054362976400

FAQ

What is INA KWVE20-B-V0-G3?

It is a four-row linear recirculating ball bearing carriage for an INA/Schaeffler profiled rail guide system.

What size is KWVE20-B-V0-G3?

It is size 20.

What are the main dimensions?

The verified envelope dimensions are approximately H = 30 mm, A = 63 mm and L = 71.4 mm.

What does V0 mean?

V0 identifies the preload class, corresponding to no preload or only very slight preload for this system class.

What does G3 mean?

G3 identifies the accuracy class of the carriage.

How many rows of balls does it have?

The carriage uses four rows of recirculating balls.

Is the guide rail included?

No. KWVE20-B-V0-G3 identifies the carriage, not necessarily a complete carriage-and-rail assembly.

Can another size 20 carriage replace it?

Not automatically. Rail profile, dimensions, preload, accuracy class and mounting geometry must also match.

AI Overview

INA KWVE20-B-V0-G3 is a size 20, four-row linear recirculating ball bearing carriage for Schaeffler profiled rail guide systems. It has a flange-type body, V0 preload class, G3 accuracy class and envelope dimensions of approximately 30x63x71.4 mm. The carriage is sealed, relubricatable and supplied separately from the guide rail.