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Option for higher functionality High-Accuracy Series

Long-term, maintenance-free operation Optional

The NSK K1 lubrication unit can be installed to ensure long-term, maintenance-free
operation.

Table 5 Dimensions of linear guides equipped with NSK K1 lubrication unit

HA Type unit: mm HS Type unit: mm

Model No. Ball slide length Thickness of Thickness of Model No. Ball slide length Thickness of Thickness of
equipped with NSK K1, V1 protection equipped with NSK K1, V1 protection
two NSK K1, L cover, V2 two NSK K1, L cover, V2

HA25 159.8 5.0 1.0 HS15 115.6 4.0 0.8

HA30 190.2 5.5 1.0 HS20 130.3 4.5 0.8

HA35 216.6 5.5 1.0 HS25 158.6 4.5 0.8

HA45 248.4 6.5 1.0 HS30 188.1 5.0 1.0

HA55 299.4 6.5 1.0 HS35 216.6 5.5 1.0

L

V1 V2 V2 V1 End seal

Protection cover NSK K1

Fig. 13 Ball slide equipped with NSK K1

● Ball slide length equipped with NSK K1 = (Standard bearing length) + (Thickness of NSK K1, V1 × Number of NSK K1) + (Thickness of
protection cover, V2 × 2)

Pioneering in the industry with super-finished ball groove feature Optional

The super-finished ball groove with a super-precision rolling groove is also available as an option for even
higher accuracy.

(The super-finished ball groove can be applied for the ultra super precision P3 grade.)

Precautions for proper use and handling

● Balls will fall out if a bearing is removed from the rail. Also, remember the bearing may shift and fall out if the rail is
tilted without a stopper.

● Take appropriate safety measures against falling loads when mounting the bearing upside down (e.g., when using
the bearing facing downward from a ceiling-mounted rail).

● Ensure that ambient temperature does not exceed 50˚C (80˚C, instantaneous) when installing NSK K1. In addition,
do not allow the unit to come into contact with degreasing organic solvents.

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