Can the carriage be replaced while keeping the rail?

Yes, if the rail is neither worn nor chipped and the carriage comes from the same series, size and preload class. A new carriage on a worn rail will however copy its geometry and lose accuracy quickly — with a visible raceway track, replace the set.

Which preload should I choose?

For machining, where stiffness and accuracy matter — higher. For transport, feeding and axes with vibration — lower or zero, because preload raises friction and accelerates wear under impacts.

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Linear guides

Carriages and rails for rolling guides

1–12 z 161

Last few (3)
INA
KB12-PP-AS
Linear Ball Bearing
⌀12 × 22 mm
dispatch within 24 h
EUR 27.08incl. VAT
EUR 31.87−15%
Last few (2)
INA
KB16-PP
Linear Ball Bearing
⌀16 × 26 mm
dispatch within 24 h
EUR 26.03incl. VAT
EUR 34.42−24%
Last few (8)
INA
KB16-PP-AS
Linear Ball Bearing
⌀16 × 26 mm
dispatch within 24 h
EUR 28.49incl. VAT
EUR 37.85−25%
Last few (11)
INA
KB20-PP
Linear Ball Bearing
⌀20 × 32 mm
dispatch within 24 h
EUR 29.84incl. VAT
EUR 32.91−9%
Last few (3)
INA
KB20-PP-AS
Linear Ball Bearing
⌀20 × 32 mm
dispatch within 24 h
EUR 39.74incl. VAT
EUR 44.16−10%
Last few (8)
INA
KB25-PP
Linear Ball Bearing
⌀25 × 40 mm
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EUR 43.95incl. VAT
EUR 58.61−25%
Last few (19)
INA
KB25-PP-AS
Linear Ball Bearing
⌀25 × 40 mm
dispatch within 24 h
EUR 42.32incl. VAT
EUR 56.43−25%
Last few (12)
INA
KB40-PP
Linear Ball Bearing
⌀40 × 62 mm
dispatch within 24 h
EUR 55.81incl. VAT
EUR 61.52−9%
In stock (124 pcs)
INA
KB40-PP-AS
Linear Ball Bearing
⌀40 × 62 mm
dispatch within 24 h
EUR 60.06incl. VAT
EUR 68.12−12%
Last few (12)
INA
KB50-PP-AS
Linear Ball Bearing
⌀50 × 75 mm
dispatch within 24 h
EUR 79.94incl. VAT
EUR 84.72−6%
In stock (50 pcs)
INA
KBO12-PP
Linear Ball Bearing
⌀12 × 22 mm
dispatch within 24 h
EUR 28.99incl. VAT
EUR 31.97−9%
Last few (1)
INA
KBO16-PP
Linear Ball Bearing
⌀16 × 26 mm
dispatch within 24 h
EUR 35.14incl. VAT
EUR 36.52−4%

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Prowadnice liniowe

Linear guides turn rotation into precise linear motion with minimal friction. The carriage rolls along the rail on rolling elements recirculating in a closed loop, so it carries loads from every direction and moments too, not just force along the axis. This is the backbone of CNC machine tools, assembly automation, plotters and manipulator axes.

Service life depends on three things: sizing to load and moment, carriage preload, and protection from chips and coolant. Contamination kills a guide faster than overload — a single chip dragged under the seal scores the raceway along the whole stroke.

What to look at when selecting

Calculate moments, not just force: tool overhang turns a small load into a large moment on the carriage.
Preload: higher gives stiffness and accuracy, lower gives easier motion and longer life under vibration.
The accuracy class must match the machine; higher than needed is wasted money.
Covers and wipers in chip-laden environments; with coolant add front seals as well.
Plan re-lubrication — most failures follow a skipped service, not an overload.

Common questions

Can the carriage be replaced while keeping the rail?: Yes, if the rail is neither worn nor chipped and the carriage comes from the same series, size and preload class. A new carriage on a worn rail will however copy its geometry and lose accuracy quickly — with a visible raceway track, replace the set.
Which preload should I choose?: For machining, where stiffness and accuracy matter — higher. For transport, feeding and axes with vibration — lower or zero, because preload raises friction and accelerates wear under impacts.