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THK

THK is a Japanese manufacturer of linear motion components, founded in 1971. The company is known for developing the first commercial linear motion (LM) guide, a recirculating ball bearing system that replaced sliding contact with rolling contact in machine tool and automation applications. THK's product range includes ball carriages, profile rails, actuators, ball screws, and related mechanical components. The products supplied by 3G Electric focus on THK's HSR and HRW series linear guides, which are used in industrial automation, packaging, material handling, and precision positioning systems. The HSR series is a standard-height, four-row ball guide available in rail widths from 20 mm to 25 mm in the supplied range, with carriage heights from 18 mm to 34.5 mm. The HRW series is a wide-rail guide with a lower profile relative to its width, offered in sizes 17, 21, 27, 35, and 50, corresponding to rail widths of 33 mm, 37 mm, 42 mm, 69 mm, and 90 mm. Carriage heights range from 14.5 mm to 46.6 mm. Both series use carbon steel for the carriage and rolling elements, and many models include end seals or side seals to retain lubricant and exclude contaminants. Preload options vary: some carriages are supplied with no preload, while others may be specified with light or medium preload depending on the application's stiffness requirements. The HSR and HRW series are designed for operating temperatures up to 80°C for standard models, with higher-temperature variants available. They are commonly mounted on machined surfaces with specified parallelism and flatness tolerances to achieve rated accuracy and service life. 3G Electric supplies THK linear guide components as part of its industrial equipment catalog. The company provides access to a range of THK ball carriages and profile rails, with product data including size, type, carriage height, rail width, seal configuration, and material. 3G Electric serves plant engineers, maintenance managers, and procurement specialists who need to identify and source replacement or new-build linear motion components. The catalog includes both individual carriages and rails, allowing users to match existing THK part numbers or specify new configurations. Technical support is available to help interpret part numbers, confirm compatibility between carriages and rails, and understand load and life calculations based on THK's published specifications. For buyers, 3G Electric offers a centralized source for THK linear motion products, with the ability to quote and fulfill orders globally. The product listings include key specifications such as size, type, carriage height, rail width, and seal features, enabling informed selection. 3G Electric does not manufacture THK products; it distributes genuine THK components. The company's role is to provide accurate product information, competitive pricing, and reliable delivery for maintenance, repair, and operations (MRO) as well as original equipment manufacturing (OEM) requirements. By focusing on the HSR and HRW series, 3G Electric supports common linear motion needs in industries such as automotive, electronics assembly, food processing, and general manufacturing. The catalog is structured to help users find the correct part quickly, with cross-references to THK's naming conventions and specifications. For applications requiring other THK product families, such as ball screws or actuators, 3G Electric can assist with sourcing through its supplier network. The company's approach is to provide technical clarity and commercial accessibility for THK linear motion components, without overstating capabilities or making unsupported claims. All product data is based on THK's published specifications and is subject to change; users should verify critical dimensions and load ratings with 3G Electric or THK documentation before installation.

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About THK

THK is a Japanese manufacturer of linear motion components, founded in 1971. The company is known for developing the first commercial linear motion (LM) guide, a recirculating ball bearing system that replaced sliding contact with rolling contact in machine tool and automation applications. THK's product range includes ball carriages, profile rails, actuators, ball screws, and related mechanical components. The products supplied by 3G Electric focus on THK's HSR and HRW series linear guides, which are used in industrial automation, packaging, material handling, and precision positioning systems. The HSR series is a standard-height, four-row ball guide available in rail widths from 20 mm to 25 mm in the supplied range, with carriage heights from 18 mm to 34.5 mm. The HRW series is a wide-rail guide with a lower profile relative to its width, offered in sizes 17, 21, 27, 35, and 50, corresponding to rail widths of 33 mm, 37 mm, 42 mm, 69 mm, and 90 mm. Carriage heights range from 14.5 mm to 46.6 mm. Both series use carbon steel for the carriage and rolling elements, and many models include end seals or side seals to retain lubricant and exclude contaminants. Preload options vary: some carriages are supplied with no preload, while others may be specified with light or medium preload depending on the application's stiffness requirements. The HSR and HRW series are designed for operating temperatures up to 80°C for standard models, with higher-temperature variants available. They are commonly mounted on machined surfaces with specified parallelism and flatness tolerances to achieve rated accuracy and service life. 3G Electric supplies THK linear guide components as part of its industrial equipment catalog. The company provides access to a range of THK ball carriages and profile rails, with product data including size, type, carriage height, rail width, seal configuration, and material. 3G Electric serves plant engineers, maintenance managers, and procurement specialists who need to identify and source replacement or new-build linear motion components. The catalog includes both individual carriages and rails, allowing users to match existing THK part numbers or specify new configurations. Technical support is available to help interpret part numbers, confirm compatibility between carriages and rails, and understand load and life calculations based on THK's published specifications. For buyers, 3G Electric offers a centralized source for THK linear motion products, with the ability to quote and fulfill orders globally. The product listings include key specifications such as size, type, carriage height, rail width, and seal features, enabling informed selection. 3G Electric does not manufacture THK products; it distributes genuine THK components. The company's role is to provide accurate product information, competitive pricing, and reliable delivery for maintenance, repair, and operations (MRO) as well as original equipment manufacturing (OEM) requirements. By focusing on the HSR and HRW series, 3G Electric supports common linear motion needs in industries such as automotive, electronics assembly, food processing, and general manufacturing. The catalog is structured to help users find the correct part quickly, with cross-references to THK's naming conventions and specifications. For applications requiring other THK product families, such as ball screws or actuators, 3G Electric can assist with sourcing through its supplier network. The company's approach is to provide technical clarity and commercial accessibility for THK linear motion components, without overstating capabilities or making unsupported claims. All product data is based on THK's published specifications and is subject to change; users should verify critical dimensions and load ratings with 3G Electric or THK documentation before installation.

Common Applications

  • Automation and robotics — THK HSR25R1SS ball carriage for 25 mm rail width in pick-and-place systems.
  • Packaging machinery — THK HRW21CA1UU wide rail carriage for 37 mm rail width in forming and filling stations.
  • Material handling — THK HSR20-1000L profile rail, 1000 mm length, for conveyor guide tracks.
  • Machine tooling — THK HRW50CR1SS carriage for 90 mm rail width in heavy-load axis slides.
  • Electronics assembly — THK HRW17CR1UU carriage for 33 mm rail width in precision positioning stages.
  • General manufacturing — THK HRW35CA1SS carriage for 69 mm rail width in custom linear motion systems.

Frequently asked questions

Common questions about THK from 3G Electric.

What is the difference between THK HSR and HRW series ball carriages?

The THK HSR series is a standard-height linear guide with a four-row ball design, available in rail widths such as 20 mm and 25 mm. The HRW series is a wide-rail guide, meaning the rail is wider relative to its height, providing a lower profile and higher moment load capacity for a given size. HRW carriages are available in sizes 17, 21, 27, 35, and 50, with rail widths from 33 mm to 90 mm. Both series use carbon steel carriages and rolling elements, and many models include end seals or side seals. Selection depends on mounting space, load direction, and required stiffness.

How do I determine the correct preload for a THK HSR or HRW carriage?

Preload in THK linear guides is specified by a code in the part number, such as no preload (often indicated by 'No Preload' in the product data) or light/medium preload. Preload affects stiffness, running accuracy, and drag torque. For applications requiring high positioning accuracy or resistance to vibration, a light preload is often used. For general conveying or low-force applications, no preload may be sufficient. The correct preload depends on the load, required rigidity, and desired service life. Consult THK's technical documentation or contact 3G Electric for assistance in interpreting the part number and selecting the appropriate preload.

What materials are used in THK HSR and HRW ball carriages?

The THK HSR and HRW series ball carriages supplied by 3G Electric are constructed with carbon steel for both the carriage body and the rolling elements (balls). The rails are also carbon steel. Some models include end seals and side seals made of rubber or synthetic materials to retain lubricant and exclude contaminants. For corrosive environments, THK offers stainless steel or surface-treated variants, but these are not listed in the current 3G Electric catalog. Always verify material compatibility with the operating environment, including temperature, humidity, and exposure to chemicals.

Can I mix THK HSR carriages and rails from different sizes?

No. THK HSR and HRW carriages are designed to match a specific rail width and size. For example, an HSR25 carriage must be used with a 25 mm rail width, and an HRW21 carriage with a 37 mm rail width. Mixing sizes will result in improper fit, reduced load capacity, and potential failure. Always match the carriage size code (e.g., 25, 21, 17) to the corresponding rail size. If you are replacing a carriage, confirm the rail size and part number. 3G Electric can help verify compatibility if you provide the existing part numbers or rail dimensions.

What is the maximum operating temperature for THK HSR and HRW linear guides?

Standard THK HSR and HRW linear guides with carbon steel components and standard seals are typically rated for operating temperatures up to 80°C. Temperatures above this can affect seal material, lubricant life, and dimensional stability. THK offers high-temperature variants with special seals and lubricants for applications up to 150°C, but these are not included in the 3G Electric catalog. If your application exceeds 80°C, consult THK or 3G Electric for suitable alternatives. Always consider thermal expansion effects on rail length and mounting accuracy.

How does 3G Electric support THK product selection and ordering?

3G Electric provides product data for THK HSR and HRW series components, including size, type, carriage height, rail width, seal configuration, and material. The catalog allows users to search by part number or specifications. For selection assistance, 3G Electric can help interpret THK part numbers, confirm carriage-to-rail compatibility, and provide quotes. The company distributes genuine THK products and can source other THK families through its supplier network. Technical support is available to help with load calculations, preload selection, and mounting requirements based on THK's published specifications. Orders can be fulfilled globally.