RGH25HA Roller Linear Guide Block for Heavy Load CNC Systems

RGH25HA is a 25 size HA long block roller linear guide block for CNC machines and other heavy-load motion systems that require higher rigidity and higher load support under demanding working conditions. Compared with ball type blocks, the roller structure provides line contact rather than point contact, which helps improve stiffness and running stability under load. With a block length of 114.4 mm, a basic dynamic load rating of 33.9 kN, and a basic static load rating of 73.4 kN, RGH25HA is suitable for machine tools, heavy-duty automation equipment, and replacement projects that require stable linear motion and higher load capacity. For replacement or new selection, rail series, mounting dimensions, preload grade, and accuracy grade should be confirmed before ordering.

To support accurate model selection, the code of RGH25HA can be understood as follows:

• RG: Roller type linear guideway series
• H: Square block type
• 25: Size 25 series (standard rail width WR = 23 mm)
• H: Super heavy load
• A: Mounting from top

Common option suffixes:

• ZB: Heavy preload
• H: High accuracy grade

Product Details Display

RGH25HA can be used as a cross-reference model for selected 25 size roller guide blocks with similar mounting dimensions and long block configuration. For replacement projects, rail series, block type, mounting dimensions, preload grade, and accuracy grade should be checked against the original assembly before ordering.

• Standard Reference: The following references are for model comparison and preliminary replacement review only. Final suitability should be confirmed against the original rail series, block dimensions, preload, and accuracy requirements before order.

• Performance Consideration: As the HA long block version, RGH25HA offers a longer block body and higher load support than the CA version. It is more suitable for applications requiring stronger mounting stability and higher load capacity. Preload grade, accuracy grade, and application conditions should be matched to the original assembly to maintain expected machine performance.

• Important Note: HIWIN RG series includes both interchangeable and non-interchangeable types. In HIWIN’s interchangeable type, blocks and rails can be freely exchanged within the same size and precision class. Cross-brand replacement should still be verified case by case based on dimensions and technical conditions.

• Higher Rigidity: The roller contact design provides higher rigidity and load support than ball-type guide blocks, helping maintain stable linear motion under heavy load

• Long Block Design: As the HA version, RGH25HA uses a longer block body than the CA version and offers higher load support, making it more suitable for applications requiring stronger mounting stability and higher load capacity. RGH25HA has a block length of 114.4 mm, with a basic dynamic load rating of 33.9 kN and a basic static load rating of 73.4 kN.

• Service Life Support: Compared with ball-type structures, the roller contact design helps reduce stress concentration under load, which supports longer running life in demanding linear motion applications.

• Configurable Sealing: Standard protection includes end seals and a bottom seal. Additional sealing options such as double seals and scrapers are available for applications exposed to chips, dust, or coolant.
• Replacement Review Friendly: This model can be considered for selected 25 size long block replacement projects, but final suitability should be confirmed against rail series, dimensions, preload, and accuracy requirements before order.

• CNC Machining Centers: Suitable for machining centers, plano millers, and other machine tools that require higher rigidity and stable linear motion under load.
• Heavy-Duty Automation Systems: Used in automation equipment and transport systems where stronger mounting stability and higher load support are required.
• CNC Grinding and Cutting Equipment: Applicable to grinding machines and heavy-duty cutting machines that benefit from higher rigidity and load capacity.
• Injection Molding Machines: Suitable for molding equipment that requires reliable linear guidance under repeated load conditions.
• Electrical Discharge Machines: Also used in EDM and other systems requiring stable motion and rigid mounting support.

• Actual Product Photos: The photos shown on this page reflect the actual block structure, machining details, and surface condition of RGH25HA. Packaging method and surface protection can be confirmed according to order requirements.
• Tolerance and Assembly Control: Key dimensions, running parallelism, and assembly consistency are checked according to internal inspection standards. Available accuracy grades and preload options should be confirmed based on the required application conditions. The RG series provides multiple preload and accuracy classes for different working requirements.
• Supply and Delivery Support: Stock status can be checked quickly for standard models. For urgent replacement demand or project schedules, delivery options can be confirmed according to quantity, rail length, and machining requirements.
• Engineering Assistance: 3D STEP and CAD files are available for selected models. Our team can assist with cross-reference review, dimension checking, and replacement selection before order, especially for long block replacement projects and applications requiring higher load support.

Q1: What is the main difference between RGH25HA and RGH25CA?

A: The main difference is block length and load support. RGH25HA is the HA long block version in the 25 size series. Compared with RGH25CA, it has a longer block length and higher load ratings, which makes it more suitable for applications requiring stronger mounting stability and higher load capacity. In the RG series dimensions table, RGH25HA has a block length of 114.4 mm, while RGH25CA is 97.9 mm. Its basic dynamic load rating is 33.9 kN, and its basic static load rating is 73.4 kN.

Q2: Can RGH25HA be used as a replacement for other 25 size long block roller guides?

A: RGH25HA can be considered as a cross-reference option for selected 25 size long block roller guide blocks with similar mounting dimensions and block configuration. Final replacement suitability should be confirmed against the original rail series, mounting dimensions, preload grade, and accuracy grade before ordering. In the HIWIN RG series, interchangeable type blocks and rails can be freely exchanged within the same size and precision class, but cross-brand replacement should still be checked case by case.

Q3: Why is RGH25HA suitable for heavy-load machining and automation applications?

A: RGH25HA uses cylindrical rollers instead of steel balls, which creates line contact rather than point contact. This structure provides higher rigidity and higher load capacity, while reducing elastic deformation under load. As the HA long block version, it also offers a longer block body for stronger mounting stability. The RG series provides Z0, ZA, and ZB preload classes, with ZB used for applications requiring very high rigidity under vibration and impact conditions.

Q4: What sealing options are available for RGH25HA?

A: Standard protection includes end seals and a bottom seal. For harsher working environments, additional sealing options such as double seals and scrapers can be selected to improve protection against chips, dust, and coolant.