2-2
2. Precautions
2.
Precautions on Use
LM Guide
2-3
Precautions on Use
C A U T I O N
Prevent dust
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Prevent foreign materials, such as cutting chips or coolant, from entering the product. Failure
to do so could damage the product.
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Prevent foreign materials, such as cutting chips, coolant, corrosive solvents or water from get-
ting in the product by using a bellows or cover when the product is used in an environment
where such a thing is likely.
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If foreign materials such as cutting chips adhere to the product, clean the product and then
replenish the lubricant.
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Small strokes can inhibit the formation of an oil film between the raceway and the area of con
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tact for rolling elements, resulting in fretting. Therefore, be sure to use a type of grease with
high fretting resistance properties. We recommend periodically adding stroke movement for
approximately the LM block length to help ensure that an oil film forms between the raceway
and the rolling elements.
Maximum temperature
80°C
Max
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Do not use this product if the external temperature exceeds 80°C. If used in excess of this
temperature, there is a risk that the resin and rubber parts may deform or become damaged
(except the heat-resistant type).
Handle with care
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Do not forcibly drive a pin, key, or other positioning parts into the product. This could create
indentations on the raceway and impair the product's functions.
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When work unavoidably requires removing/mounting the LM block from/onto the LM rail, use
the removing/mounting jig to perform the work. (The removing/mounting jig is not provided as
standard equipment. To use it, contact THK.) (See Figure 4-4.)
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To use the removing/mounting jig, place the LM rail end surface and the removing/mounting
jig end surface in full contact, and insert with the LM rail and the removing/mounting jig in
parallel. (See Figure 4-4.)
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When removing the LM block from the LM rail and then replacing the block, an LM block
mounting/removing jig that facilitates such installation is available. Contact THK for details.
(See Figure 4-4.)
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Inserting the LM block onto the LM rail and using the product while the rolling elements are
removed may cause early damage.
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If any of the rolling elements falls from the LM block, discontinue use and contact THK.
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A lack of rigidity and accuracy of mounting components may cause the bearing load to
localize, reducing the performance of the bearing significantly. Therefore, consider carefully
the rigidity and accuracy of the table and base, and the strength of the securing bolts.
Falling objects
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Inserting the LM block while tilted risks foreign material entering, internal parts being
damaged, and rolling elements dropping off.
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If the endplate is damaged due to an accident, etc., balls may fall out of the LM Guide or the
LM block may become detached from the LM rail and fall down. If an LM Guide will be used in
an inverted position, take preventive measures such as adding a safety mechanism to prevent
falls.
