RGH35HA Long Block Roller Linear Guide for Heavy Load CNC Systems

RGH35HA is a 35 size HA roller linear guide block for CNC machines and other heavy-load motion systems that require higher rigidity and stronger 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. As the long block version in the 35 size series, RGH35HA has a block length of 151.5 mm, with a basic dynamic load rating of 73.1 kN and a basic static load rating of 142 kN. Compared with the CA version, it provides a longer block body and higher load support, making it suitable for machine tools, heavy-duty automation equipment, and other applications where mounting stability and consistent linear motion are important. 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 RGH35HA can be understood as follows:

• RG: Roller type linear guideway series
• H: Square block type
• 35: Size 35 series (standard rail width WR = 34 mm)
• H: Super heavy load
• A: Mounting from top

Common option suffixes:

• Z0 / ZA / ZB: Light, medium, or heavy preload
• H / P: High or precision grade

RGH35HA Technical Specifications

Optional Technical Conditions

• Available Preload: Z0 / ZA / ZB
• Available Accuracy Grade: H / P
• Typical Use: CNC machining centers, heavy-duty cutting machines, CNC grinding machines, injection molding machines, automation systems, and other equipment requiring high rigidity and high load capacity.

Photo Reference: The images above show the actual block structure, machining details, and surface finish of the RGH35HA long block design. For replacement or interchange, rail series, mounting dimensions, preload grade, and accuracy grade should be confirmed before order.

RGH35HA can be used as a cross-reference model for selected 35 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, RGH35HA 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 in the 35 size series, RGH35HA uses a longer block body than the CA version and offers higher load support. It has a block length of 151.5 mm, with a basic dynamic load rating of 73.1 kN and a basic static load rating of 142 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.

• 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 RGH35HA. 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 classes and accuracy grades 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 RGH35HA and RGH35CA?

A: The main difference is block length and load support. RGH35HA is the HA long block version in the 35 size series. Compared with RGH35CA, 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, RGH35HA has a block length of 151.5 mm, a basic dynamic load rating of 73.1 kN, and a basic static load rating of 142 kN.

Q2: Can RGH35HA be used as a replacement for other 35 size long block roller guides?

A: RGH35HA can be considered as a cross-reference option for selected 35 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 RGH35HA suitable for heavy-load machining and automation applications?

A: RGH35HA 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 RGH35HA?

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.