RGH65CA Large-Size Roller Linear Guide Block for Heavy CNC Machines

RGH65CA is a 65-size high square roller linear guide block designed for large heavy-load machine structures where load capacity, mounting rigidity, and system stability are more important than compact block size. As the CA type in the RGH65 series, it uses a standard block length with top mounting, making it suitable for large machine axes that need strong support but do not require the longer HA block body.

With a dynamic load rating of 213 kN and a static load rating of 411.6 kN, RGH65CA provides a high load margin for large CNC machines, gantry systems, heavy moving tables, and industrial equipment requiring rigid linear support. Its static rated moments are MR 16.20 kN·m, MP 11.59 kN·m, and MY 11.59 kN·m, giving the block strong support under table weight, offset load, cutting force, or directional load changes.

For installation, RGH65CA uses M16 × 20 block mounting threads and should be matched with RGR65 roller guide rails. The matching RGR65 rail uses M16 × 50 mounting bolts, with a 75 mm rail hole pitch and 35 mm standard rail end distance. These mounting details should be checked carefully for replacement projects, especially when the existing machine base already has fixed rail mounting holes.

Compared with RGH65HA, RGH65CA keeps a shorter block body while still offering high load capacity in the 65-size RG platform. It is a practical option for large equipment where the axis needs heavy-load support and high rigidity, but the longer bearing contact area of the HA block is not required.

To support accurate model selection, the code of RGH65CA roller linear guide block can be understood as follows:

RG: Roller type linear guideway series
H: Square block type
65: Size 65 series, with standard rail width WR = 63 mm
C: Heavy load block type / standard block configuration
A: Mounting from top

Common option suffixes:

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

In practical selection, RGH65CA refers to a 65-size standard square type roller linear guide block for large heavy-load linear motion systems. The model should be matched with the corresponding RGR65 rail, while preload and accuracy grade should be selected according to the actual machine requirement.

• Available Preload: Z0 / ZA / ZB
• Available Accuracy Grade: H / P
• Matched Rail: RGR65 rail
• Rail Mounting Type: Standard mounting from top
• Lubrication: Grease lubrication or oil lubrication can be selected according to machine speed, load, and maintenance method

• Oil Viscosity Reference: Oil lubrication normally uses oil in the range of about 32–150 cSt
• Grease Replenishment Reference: Check grease every 100 km or every 3–6 months, depending on operating conditions
• Dust Protection Options: Standard protection, ZZ, KK, or DD configurations are available according to the working environment
• Rail Length: Standard or cut-to-length rail can be supplied according to the required travel length or drawing
• Typical Use Level: Suitable for large heavy-load and high-rigidity linear motion systems

Photo Reference:

The photos above show the actual RGH65CA standard square roller block, including the top mounting surface, side profile, sealing area, end face, lubrication port, machining finish, and model marking. They help customers check the real product structure instead of relying only on catalog drawings.

For replacement review, the photos should be checked together with the drawing and technical specifications before order confirmation.

• Large 65 Size Standard Block

The RGH65CA roller linear guide block uses a standard square block structure in the 65-size RG series. It is designed for large machine axes where high load capacity and mounting stability are required, while the longer HA block is not necessary.

• High Load Capacity for Large Machine Structures

RGH65CA provides a dynamic load rating of 213 kN and a static load rating of 411.6 kN. This load level makes it suitable for heavy-duty motion systems, large worktables, and equipment where smaller roller guide sizes may not provide enough load margin.

• Strong Support Against Moment Loads

With static rated moments of MR 16.20 kN·m, MP 11.59 kN·m, and MY 11.59 kN·m, RGH65CA supports machine axes affected by offset loads, table weight, cutting force, or directional load changes.

• Roller Contact for High Rigidity

RGH65CA uses rollers instead of balls as the rolling elements. The roller line contact helps increase stiffness between the rolling elements and the raceway, reducing elastic deformation under heavier working loads.

• Top-Mounted Square Block Design

RGH65CA adopts a high square block structure with mounting from the top. The M16 × 20 block mounting thread provides a firm fixing method for large machine tables, heavy slide bases, and rigid mechanical frames.

• Matched RGR65 Rail System

RGH65CA is designed to work with the corresponding RGR65 roller guide rail, keeping block and rail selection clear for matched assembly supply, cut-to-length rail orders, and large machine replacement projects.

• Practical Alternative to the HA Long Block

Compared with RGH65HA, the CA version keeps the block shorter while still providing high load support. It is useful when a large axis requires strong rigidity and load capacity, but not the additional block length and moment capacity of the HA version.