AirTAC LSH25BK-F1N-N-D-M6 Flange Linear Block | Group D Interchangeable

Model: LSH25BK-F1N-N-D-M6

1. Executive Summary

The AirTAC LSH25BK-F1N-N-D-M6 is a Flange Type slider block from the LSH Heavy Load Linear Guide series.

Unlike square blocks, this model features extended Flange Wings on both sides, providing a wider mounting surface. This design not only increases the block's load-bearing capacity against lateral moments but also allows for wider mounting hole spacing. It is highly suitable for heavy-load platforms requiring high stability and top-down locking installation. Additionally, the "D" code indicates it belongs to the Group D pairing class, offering excellent interchangeability for maintenance.

2. Model Code Decoding

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Please pay special attention to the following identifiers:

• LSH: Series Name — High Assembly Standard Linear Guide.

• 25: Size Specification — Nominal rail width 25mm.

• BK: Block Component — Indicates this is an independent block unit.

• F1: Block Type — Flange Type, Top Mounting.

  • Core Feature: The block has extended flanges (wings) on the left and right, with mounting holes located on these flanges.

  • Mounting Method: F1 specifically indicates that the mounting holes are Through Holes (non-threaded). Bolts pass through the block from the top to lock into the workbench (or nuts) above.

• N: Accuracy Class — Class N (Normal/Standard), meeting general automation transmission needs.

• N: Preload Class — N (Standard Preload/No Preload), ensuring smooth operation with low friction resistance.

• D: Pairing/Interchange Code — Group D Pairing.

  • Designed specifically for maintenance interchangeability. It ensures that when matched with a rail of "Group D" tolerance, the preload and precision are perfectly aligned.

• M6: Grease Nipple Spec — Standard M6 threaded oil nipple connector.

3. Core Features

A. Wide Flange Structure

Compared to the square block (HN), the F1N Flange Type is significantly wider (typically 70mm wide, whereas the square type is only 48mm). This wide-body structure provides a broader support base, drastically improving Moment Rigidity. This implies stability that far exceeds square blocks, especially when using a single block on a single axis.

B. Optimized Mounting (Top Mounting)

The F1 design means the hole layout on the flange allows for locking from above. This is essential for large workbenches where fastening screws from the bottom is impossible, making installation and disassembly much more convenient.

C. Group D Interchangeability

As a maintenance spare part, the "D" pairing code eliminates the risk of binding or wobbling caused by purchasing random blocks. As long as your rail or old block belongs to Group D, this block is "Plug and Play," requiring no equipment re-debugging.

D. 4-Direction Equal Load

Despite the change in shape, the interior retains the 4-row circular arc groove design, maintaining the AirTAC LSH series' signature capacity for equal load in all four directions (up, down, left, right) and self-alignment capabilities.

4. Technical Specifications

Note: Dimensions differ significantly from square blocks.

• Compatible Rail: AirTAC LSH25 Series Rail

• Block Width (W): 70 mm (Significantly wider than the 48mm square block)

• Block Length (L): Approx. 83 mm (Standard length)

• Assembly Height (H): 40 mm (Consistent with square blocks of the same size; rails can be mixed)

• Mounting Hole Pitch: 57 mm (Width) x 45 mm (Length)

  • Important: Be sure to verify the hole spacing on your mounting table, as this is completely different from the 35x35mm spacing of square blocks.

• Mounting Hole Type: 4 Through Holes (Non-threaded), for bolt penetration.

• Dynamic Load Rating ($C$): ~ 26.5 kN

• Static Load Rating ($C_0$): ~ 36.5 kN

5. Target Applications

The LSH25BK-F1N-N-D-M6 is suitable for scenarios requiring higher moment stability:

• Single-Axis Drive Platforms: Due to the strong torque resistance of the flange block, a "Single Rail + Single Flange Block" configuration can be used to support the workbench in certain light-load scenarios, saving costs.

• Heavy Gantries: The large contact area better distributes gravity, making it suitable for the moving columns of large gantry structures.

• Wide Workbenches: Ideal for equipment like printing machines, UV flatbed printers, and large cutting machines, where flange blocks provide a more solid base support.

• Maintenance Replacement: Specifically used to replace flange-type competitor products such as HIWIN HGW25CC or THK HSR25R (Please confirm specific hole pitch before replacing).