Explore THK bearings and linear motion products with South India Bearing Co. in Chennai. Understand LM guides, ball screws and linear bushings, browse documented series and manufacturer catalogues, and send your complete product requirement for a quotation.
THK bearings and motion components cover straight-line guidance, feed motion and rotary support. Understanding these functions makes it easier to locate the right catalogue and communicate a complete product requirement. South India Bearing Co. handles THK product enquiries in Chennai, with catalogue references and direct links to the relevant product families.
LM guides, ball screws and linear bushings
LM guides: rails and carriage blocks
An LM guide supports movement along a profiled rail. A carriage block travels along the rail using rolling elements, providing guided motion for machine axes and positioning equipment. The rail, block style and complete series reference belong together when identifying an assembly.
Our series table below distinguishes SHS and SSR caged-ball families from the HSR full-ball family. For replacement enquiries, record both the rail and block markings, rail length, number of blocks and any specified preload or accuracy class.
A ball screw uses rolling balls between a screw shaft and nut to transmit motion. It is a feed component, while a guide supports and constrains the moving assembly. These are different functions within a machine axis.
A complete enquiry identifies the nut and shaft reference, screw diameter, lead, travel or overall length and quantity. Where the shaft has machined ends, include the approved drawing rather than relying on a photograph of the nut alone.
A linear bushing works with a cylindrical shaft to provide straight-line guidance. This is a different construction from the profiled rail-and-block arrangement of an LM guide. Housing style and the full bushing designation help identify the requested component.
For purchasing, include the existing bushing code, shaft size, housing or flange reference and quantity. The linked THK linear bushing catalogue provides the product drawings and model details needed to interpret the reference.
These are family references, not complete order codes. Size, block form and suffixes identify further details; consult the linked catalogue for the requested model.
Series / designation
Product range
Catalogue & enquiry
SHS
Caged-ball LM guides
Linear guide family with caged rolling balls and a four-way equal-load configuration.
Machine tools and automated equipment use guided axes to move and position parts. An LM guide provides the guided path, while a ball screw can provide feed motion. Robotics and precision positioning also involve rotary joints, for which THK publishes cross-roller ring ranges. These examples explain the functions of the product families; the equipment specification identifies the required model.
THK’s wider product portfolio
THK’s official range also includes ball splines, cross-roller rings, cam followers and other linear motion guides. For an enquiry outside the three catalogue families above, send the complete manufacturer reference so the specific requirement can be checked.
They both provide linear guidance, but use different constructions. An LM guide has a profiled rail and carriage block; a linear bushing runs on a round shaft. Their complete model references and mounting arrangements distinguish them.
Does a ball screw replace a linear guide?
A ball screw transmits feed motion; a guide supports the guided path. They have different roles and can be used together in an axis assembly.
Can a replacement block be ordered by rail size alone?
Include the full make, series and block code, plus the existing rail marking. Size alone leaves important details unspecified. The manufacturer catalogue and equipment requirement govern the requested combination.
What should I send for a THK quotation in Chennai?
Kindly send the complete designation, quantity and delivery requirement. For guides, add rail length and block details. For ball screws, include the shaft and nut reference or drawing. Photographs of markings help preserve suffixes.
Share the part number or series, preferred quantity and delivery location. For a replacement enquiry, you can include the existing product marking or a photograph.
