LM Guide >THK LM Guide > Lm Roller  >Types and Features

 

             In LM Roller type LR-Z, the dual rollers are assembled
            on the exterior of the raceway base, are precision-ground and highly rigid,
            and are held in line by the retainer so that they ensure perpetual circulation.
            The center guide, which is formed into one unit with the raceway base,
            is provided in the center of the loaded area of the raceway base.
            This unique design of the center guide continually corrects the skew (tilt) of rollers,
            thereby ensuring smooth rolling motion.
            LM Roller type LR can be applied to the XYZ guides of various NC machine tools,
            precision press ram guides, press die changers, and various heavy material conveyance systems,
            to name just a few.

Type LR-Z

Type LRA-Z

 For installation, fit a unit into a groove machined
 into a mounting surface. Fasten the LM Roller
thereto by inserting the mounting bolts into the
 four holes drilled into the raceway base.
 This type is suitable where the machine in which the  Roller is to be used does not have sufficient thickness  (Fixtures SM and SE can be used).
 As the retainer is made by resin molding, seals are  easily adhered to it. Seals are made of highly  wear-resistant special rubber and have a double-lip  shape, providing them with high contamination protection  performance. The resin retainer also contributes to a  reduction in weight.

The mounting method is the same as for type LR-Z, i.e.,
fitting a unit into a groove. For this type, Fixtures SM and
SEM are used to allow thick bolts to be firmly tightened.
This type is compact in size.

The retainer is made by resin molding and is provided with seal-fitting grooves, making seals easy to install.
Seals are made of highly wear-resistant special rubber and
have a double-lip shape, providing them with high contamination protection performance. The resin retainer also contributes to
a reduction in weight.

LRB-Z Type

LRU Type

 As no groove is needed on the mounting surface, the required  machining man-hours can be reduced. For installation, Fixtures  SMB and SEB are used, enabling the Roller to be solidly  fastened in place.

 The retainer is made by resin molding and is provided with  seal-fitting grooves, making seals easy to install. Seals are  made of highly wear-resistant special rubber and have a  double-lip shape, providing them with high contamination  protection performance. The resin retainer also contributes to a  reduction in weight.

As no groove is needed, the required machining
man-hours can be reduced. For installation,
simply insert mounting bolts into the four holes drilled
in the raceway base.

Spring Pad Type PA

Fixture Types SM/SMB,  SE/SEB

Simply by attaching a Spring Pad to the rear of the
LM Roller, assembling them as shown in Fig. 4 a)
and tightening the adjustment bolt, the clearance and preload can be adjusted. Adjustment is that easy.

Use of Fixture SM or SE eliminates the need to tap LM Roller mounting holes. In this way, the Roller can be secured
more solidly.

Types SE and SEB are provided with a special
synthetic rubber wiper with a double-lip shape.
A high contamination protection effect is therefore assured.