Linear Guides
Linear motion guides are components that guide the movable parts of machines smoothly in a straight line. By rolling rolling elements such as steel balls or rollers, they keep friction lower than sliding guides and enable high-precision positioning and light motion. Main types include linear ball bearings (linear bushings), which use a cylindrical outer sleeve on a shaft, and crossed roller ways, in which cylindrical rollers are arranged alternately crossed at right angles on V-shaped raceways. Some designs circulate the rolling elements for unlimited travel, while others serve finite reciprocating motion with limited stroke. They are used in slide sections of machine tools and office equipment, transfer units, semiconductor manufacturing equipment, and similar applications. Some products are designed for special environments such as cleanroom, vacuum, corrosive, and high-temperature conditions.
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Linear guides
LINEARWAY
A linear guide that provides high-precision linear motion with slide units moving endlessly along a track rail, designed for special environments.
JTEKT Corporation
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Linear bushings
New Clean Pro-PR Specification Hybrid Ceramic Linear Ball Bearing
Linear ball bearing with excellent low particle generation, suitable for clean and high-temperature environments.
JTEKT Corporation
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Linear bushings
Linear Ball Bearing
High-precision linear motion bearing for infinite linear motion that accommodates special environments, including silicon nitride balls.
JTEKT Corporation
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Linear Guides
Special Environment Linear Bearing
Linear bearings for use in special environments such as cleanroom, vacuum, corrosion-resistant, and high-temperature conditions. Selection conditions are organized using a specification survey sheet.
JTEKT Corporation
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Linear Guides
SDM, SDMF, SDMK Series Linear Ball Bearings for Special Environments
High-precision linear ball bearings for unlimited linear motion, with balls, cage and shield built into the outer sleeve. Usable in clean and vacuum environments.
JTEKT Corporation
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Linear Guides
New Clean Pro-PR Cross Roller Way (CRW Series)
A cross roller way with cylindrical rollers arranged alternately and orthogonally, using two V-shaped planes as raceway surfaces. A high-precision linear motion bearing capable of receiving loads in all directions.
JTEKT Corporation
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Linear guides
LWL, LWES, LWHS Series Linear Way for Special Environments
A linear motion bearing unit for clean and vacuum environments, in which the slide unit moves endlessly in a straight line along the track rail.
JTEKT Corporation
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Linear guides
LWL Series Linear Bearing (Roller Type EXSEV Linear Bearing)
EXSEV linear bearing series with rail widths from 5 mm to 42 mm. Basic load ratings and moment values are listed by model number.
JTEKT Corporation
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Linear guides
TSUBAKI NAKASHIMA Linear Guide (Ball Way)
Linear guides including precision ball ways, miniature ball ways, slide ways, and more.
Tsubaki Nakashima Co., Ltd.
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Linear Guides
Linear Motion Bearings (KLM, KD, KH)
Rolling linear motion bearings using steel balls. KLM and KH types provide unlimited linear motion; KD type provides limited reciprocating motion.
NTN Corporation
How to choose Linear Guides
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1. Select the type and size to match the shaft diameter
Linear ball bearings are used with the outer sleeve mounted on a shaft, so the shaft diameter d must match the shaft. The listed products have shaft diameters of 3 to 60 mm. The type and size are determined by the bearing number, so check the outer diameter D together with the shaft diameter and confirm that it fits the housing bore dimensions.
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2. Check the basic dynamic load rating for load and life
The basic dynamic load rating C is the reference load used when calculating rated life. The listed products range from 20.3 to 323 N. Determine the required life from the actual applied load and operating conditions, then select a size with sufficient margin over C, or a roller type or double-block type.
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3. Use the static load rating for stationary and shock loads
The basic static load rating C0 is the reference for the permissible load when the unit is stationary or subjected to shock loads. To prevent permanent deformation of the rolling elements and raceways, secure a static safety factor against the maximum load. This is especially important in applications with moment loads.
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4. Match rail length and stroke
In finite-stroke types such as crossed roller ways, the usable stroke is determined by the rail length L and the length of the retainer. The listed products have rail lengths of 80 to 600 mm. Confirm that the length is sufficient for the required stroke and fits within the installation space.
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5. Determine accuracy grade and preload by application
Accuracy classes such as parallelism of travel and preload (the tightness of the internal clearance) affect positioning accuracy and rigidity. Increasing preload raises rigidity but also increases frictional resistance. Select based on the balance between the accuracy required by the equipment and smooth, light motion.
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6. Select materials and specifications suited to the environment
In cleanroom, vacuum, corrosive, and high-temperature environments, the body and rolling element materials, lubrication method, and presence of seals differ from standard products. To prevent particle generation, gas emission, and rust, select products with materials and specifications suited to the operating environment. Where necessary, also check non-magnetic or insulating specifications.
This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.