AirTAC LSH25BK-HN-N-B-M6 Linear Guide | Heavy Duty Rail

Model: LSH25BK-HN-N-B-M6

1. Executive Summary

The AirTAC LSH Series is a high-assembly (high-profile), four-row, heavy-duty linear guide. This series utilizes a DF (face-to-face) circular arc groove design, featuring equal load capacity in four directions and excellent self-aligning capabilities.

The LSH25BK-HN-N-B-M6 is the most widely used 25mm specification model in this series, designed for automation equipment requiring high rigidity, high precision, and stability. Its standard square block design (non-flanged) makes it excellent for applications where lateral space is limited but heavy load bearing is required.

2. Model Code Decoding

Understanding the specific code to ensure correct selection:

Click to download the catalog

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

• 25: Rail Size — Rail width is nominally 25mm (Industrial Standard).

• B: Block Type — Square Block (No flange wings), suitable for top-down screw locking to save side space.

• K: Block Length — Compact/Short Type Block (Note: Indicates a shorter block length compared to standard or extra-long versions).

• H: Accuracy Grade — H Grade (High), satisfying most precision automation requirements.

• N: Preload — N (Standard/No Preload), ensures smooth operation with low resistance, suitable for general motion control.

• N: Dust Proofing — Standard End Seal (effectively blocks dust).

• B: Rail Mounting — Type B Counter-bore holes (Bolts installed from top to bottom).

• M6: Lubrication — Equipped with an M6 Thread grease nipple port, facilitating connection to automatic oil systems or manual grease guns.
  

3. Core Features & Benefits

A. Equal Load Capacity in Four Directions

The 4-row steel ball design with a 45-degree contact angle ensures that the guide can bear the same rated load in radial, reverse-radial, and lateral directions. This allows the LSH25 to be flexibly installed horizontally, vertically, inverted, or wall-mounted without compromising service life.

B. Excellent Self-Aligning Capability

The DF (face-to-face) circular arc groove structure allows the system to absorb minor installation surface errors or assembly deviations through the elastic deformation of the steel balls. This ensures smooth motion and prevents binding/jamming.

C. High Rigidity & Impact Resistance

The LSH series reinforces the rigidity of both the block body and the rail. Compared to low-assembly series, it can withstand greater moment loads and impact shocks, making it highly suitable for machining centers and heavy-duty handling machinery.

D. Strong Interchangeability

The AirTAC LSH25 series is manufactured strictly according to international standard dimensions.

• Benchmarking: It can directly replace mainstream competitor models such as HIWIN HGH25CA or THK HSR25 (Always verify specific mounting hole pitches before replacement).

E. Dust Proof & Lubrication

• Sealing Design: Standard equipment includes high-wear-resistant rubber scrapers to prevent cutting chips and dust from entering the block.

• M6 Grease Nipple: The M6 port designed for the LSH25 is compatible with mainstream grease guns and automatic lubrication piping systems.

4. Technical Specifications

Reference data based on the LSH25 standard series:

• Rail Width (W): 23 mm (Mounting fit) / 25 mm (Nominal base)

• Assembly Height (H): 40 mm (Top of block to bottom of rail)

• Block Width (W): 48 mm

• Mounting Hole Pitch: 35mm x 35mm (Block mounting screws)

• Dynamic Load Rating (C): Approx. 26.5 kN (Reference value, depends on block length)

• Static Load Rating (Co): Approx. 36.5 kN

• Permissible Static Moment: High moment rigidity in all three directions.

• Material: High Carbon Chromium Bearing Steel (GCr15), Hardness HRC58-62.

5. Target Applications

The LSH25BK-HN-N-B-M6, with its compact square design and heavy-load characteristics, is particularly suitable for:

1. Precision Machine Tools: Feed axes for grinders, milling machines, and lathes.

2. Automation Equipment: Truss robots and automatic loading/unloading devices.

3. Woodworking Machinery: Cutting equipment requiring dust protection and shock resistance.

4. Injection Molding/Die Casting: Extraction arms and core motion mechanisms.

5. Packaging & Handling: Heavy-duty conveyor belts and transfer mechanisms.

6. Maintenance Guide

• Initial Use: The product comes coated with anti-rust oil. It is recommended to wipe the rail surface and apply lithium-based grease before installation.

• Lubrication Cycle: It is recommended to replenish grease via the M6 nipple every 100km of operation or every 3-6 months (depending on operating frequency).

• Environment Note: If used in environments with excessive dust (e.g., woodworking, grinding), consider adding a dust cover or selecting AirTAC's double-layer seal accessories.

7. Summary: Why Buy This?

"Industrial Rigidity at a Consumer Price."
The AirTAC LSH25BK-HN-N-B-M6 offers excellent cost-performance. It not only provides precision and lifespan comparable to top-tier Japanese and Taiwanese brands but also relies on AirTAC's robust supply chain to ensure stable delivery and convenient after-sales support. For equipment manufacturers pursuing both stability and cost control, this is the ideal choice.

Note: For specific dimensional drawings and detailed load data, please refer to the official AirTAC PDF catalog (LSH25 Chapter) to ensure mounting holes perfectly match your design.