RGH45HA is a 45-size high square roller linear guide block designed for machine axes that require stronger moment-load support, longer block contact length, and higher rigidity than the standard CA block version. As the HA type in the RGH45 series, it uses a long block structure with top mounting, making it suitable for heavier moving tables, vertical axes, and machine structures where load distribution is more demanding.

With a dynamic load rating of 116 kN and a static load rating of 230.9 kN, RGH45HA provides a higher load margin than RGH45CA in the same 45-size RGR rail series. Its static rated moments are MR 6.33 kN·m, MP 5.47 kN·m, and MY 5.47 kN·m, which makes it more suitable for axes affected by overhung loads, longer moving assemblies, or directional force changes during cutting and positioning.

For installation, RGH45HA uses M10 × 17 block mounting threads and should be matched with RGR45 roller guide rails. The matching RGR45 rail uses M12 × 35 mounting bolts, with a 52.5 mm rail hole pitch and 22.5 mm standard rail end distance. These mounting details should be checked carefully when the guide block is used for replacement or when the existing machine base has a fixed hole pattern.

Compared with RGH45CA, RGH45HA has a longer block body, higher load rating, and stronger moment-load support. It is generally selected when the machine axis requires better stability under heavy cutting, vertical loading, larger moving-table conditions, or longer bearing support.

To support accurate model selection, the code of RGH45HA roller linear guide block can be understood as follows:

RG: Roller type linear guideway series
H: Square block type
45: Size 45 series, with standard rail width WR = 45 mm
H: Super heavy load / long block type
A: Mounting from top

Common option suffixes:

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

In practical selection, RGH45HA refers to a 45-size long square type roller linear guide block for heavy-load and high-rigidity linear motion systems. The model should be matched with the corresponding RGR45 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: RGR45 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 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 high-rigidity, heavy-load, and higher moment-load linear motion systems

The lubrication, dust protection, preload, and rail length information above follows the RG catalog structure for this series.

Photo Reference:

The photos above show the actual RGH45HA long square roller block, including the top mounting surface, model marking, side profile, end face, lubrication port, internal roller circulation area, and bottom roller arrangement. They are provided to help customers check the real block 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.

• RGH45HA can be used as a cross-reference model for selected 45 size long square 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 cross-reference table is provided for preliminary model comparison only. Final replacement suitability must be confirmed against the original rail series, block dimensions, mounting hole pattern, preload, accuracy grade, rail profile, and running clearance before order.
• Performance Consideration:
  As the HA long block version, RGH45HA should be compared with the original assembly by block length, mounting layout, preload grade, and accuracy grade. For replacement review, dimensional matching and running condition are more important than model name similarity.
• Important Note:
  HIWIN RG series has interchangeable and non-interchangeable versions. Cross-brand replacement is only a reference; rail profile, mounting dimensions, preload grade, accuracy grade, and running clearance must be checked before order.

• Long Block Design for Higher Moment Support

The RGH45HA roller linear guide block uses a longer block body than the CA version. This helps improve moment-load support when the machine axis carries a longer moving table, heavier fixture, or offset working load.

• Higher Load Capacity in 45 Size

RGH45HA provides a dynamic load rating of 116 kN and a static load rating of 230.9 kN. This gives the block a stronger load margin than the standard RGH45CA block while keeping the same 45-size RGR45 rail platform.

• Stronger Resistance to Directional Loads

With static rated moments of MR 6.33 kN·m, MP 5.47 kN·m, and MY 5.47 kN·m, RGH45HA is suitable for axes affected by pitching, rolling, or yawing moments. This is useful in vertical axes, large moving platforms, and heavy-duty machining structures.

• Roller Contact for High Rigidity

RGH45HA uses a roller contact structure instead of a conventional ball contact design. The roller line contact helps increase stiffness between the rolling elements and the raceway, reducing deformation under heavier working loads.

• Square Block with Top Mounting

RGH45HA adopts a high square block structure with mounting from the top. The M10 × 17 block mounting thread provides a firm fixing method for machine tables, slide bases, and heavy-duty mechanical assemblies.

• Matched RGR45 Rail System

RGH45HA is designed to work with the corresponding RGR45 roller guide rail, keeping block and rail selection clear for matched assembly supply and cut-to-length rail orders.

• Suitable for Heavy-Duty Axis Layouts

Compared with RGH45CA, the HA version is more suitable when the equipment requires higher moment-load capacity, a longer contact area, or improved stability under heavy machining and repeated positioning.

RGH45HA is a 45 size long square type roller linear guide block in the RG series. It uses rollers instead of balls and is mainly selected for heavy-load linear motion systems requiring higher rigidity and stronger moment-load support.

RGH45HA should be matched with the corresponding RGR45 roller guide rail. For replacement projects, the rail drawing and original assembly should be checked before ordering.

RGH45HA is the long block version, while RGH45CA is the standard block version. RGH45HA is usually selected when the machine structure requires higher moment-load support, longer bearing contact, or better stability under heavier working loads.

RGH45HA can be used as a cross-reference model for selected 45 size long square roller guide blocks with similar mounting dimensions. However, replacement should not be confirmed by model name alone. Rail profile, block dimensions, preload grade, accuracy grade, and running clearance should be checked case by case.