AirTAC LSH15R / LSH15RLX 15mm Linear Guide Rail | 4-Row Heavy-Duty Structure | HGR15 Compatible | Custom Length Available

Model: LSH15RLX (LSH15R-Length-X)

1. Executive Summary

The AirTAC LSH15RLX is the 15mm specification standard linear guide rail body (rail only, block not included) within the LSH High Assembly Series.

It is the most refined and compact member of the AirTAC heavy-duty guide family. Despite its mini size, it does not compromise on performance, adopting the same four-row circular arc groove design as the larger specification rails. This means that, compared to miniature guides (MG Series) of the same width, the LSH15R offers superior torsional rigidity and a higher rated load capacity, making it the preferred rail base for high-precision 3D printers, small robotic arms, and medical instruments.

2. Model Code Decoding

How to interpret LSH15RLX:

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

  • Note: This is the "Standard Heavy Duty" series, not the "Miniature" series.

• 15: Specification Size — Nominal width of 15 mm.

  • Positioning: Small volume, lightweight, but with strong structural rigidity.

• R: Component Type — Rail.

  • Represents the rail being purchased separately, typically for DIY equipment assembly (buying based on design length) or replacing worn rails in old equipment.

• LX: Custom Length (Length Variable).

  • L = Length.

  • X = Variable. The order requires specifying the exact length in millimeters (e.g., LSH15R-450L). The factory offers precision cutting services ranging from 100 mm up to 4,000 mm.

3. Technical Specifications

(Essential Data for Designers and Engineers)

4. Key Benefits

A. Compact but Heavy Duty

This is the biggest difference between the LSH15R and Miniature Guide rails. Miniature guides typically use only two rows of balls, while the LSH15R features four rows of balls. Despite having the same 15mm width, the LSH15R's rigidity, impact resistance, and service life far exceed those of miniature guides, making it ideal for high-speed reciprocating movement mechanisms like print heads or gripping units.

B. Industry Standard Interchangeability

The AirTAC LSH15R strictly adheres to industry universal dimensions.

• Compatibility: Its rail cross-section dimensions and hole pitch (60 mm) are identical to those of HIWIN HGR15 and THK HSR15. If you wish to upgrade off-brand rails on your equipment to AirTAC, or replace worn imported rails, the LSH15R is the perfect drop-in replacement solution.

C. High-Precision Grinding

The rail utilizes a one-time profile grinding process, ensuring the parallelism of all four raceways. When paired with AirTAC's high-precision blocks, this achieves extremely low starting friction, which is crucial for small stepper motors with limited driving force.

D. Flexible Customization

Supports millimeter-level length customization (Cut-to-length). For high-precision requirements, the End Distance (E-value) can be specified, ensuring the mounting holes at both ends of the rail are symmetrical and the load distribution is uniform.

5. Recommended Applications

The LSH15R is the core framework for light precision manufacturing:

• High-End 3D Printers (Voron/CoreXY): Preferred choice for X/Y axis beams, more stable than MGN12/15, resulting in fewer printing artifacts.

• Desktop CNC/Laser Engraving Machines: Bearing the movement of the laser head or spindle.

• Medical Biochemical Analyzers: Sample movement axes.

• PCB Circuit Board Equipment: Feeding axes for drilling or inspection platforms.

• Small Educational Robotic Arms: Linear slides for teaching robots.

6. Compatible Bearing Block Recommendation

This guide rail must be used with AirTAC LSH15 Series blocks:

• LSH15BK: Square Block (Narrow body, 34 mm wide, 28 mm high).

• LSH15F1N: Flange Block (Wide body, 47 mm wide, 24 mm high).

Special Note: Please confirm your design space before purchasing. The height difference between the BK and F1N blocks (28 mm vs. 24 mm) is a common "trap" in the 15mm specification.

7. Ordering and Installation Tips

• Screw Specification: M4 screws must be used. We recommend using washers or high-strength M4x16 screws (specific length depends on base plate thickness).

• Hole Cap Installation: The countersunk holes on the 15mm rail are small and prone to dust accumulation. AirTAC typically includes green plastic dust caps with the rail; after installing the screws, it is essential to tap the caps into the holes and scrape them flat to protect the block's dust wipers.

• End Distance (E-value): If the mounting holes on your base plate are already drilled, you must specify the "E-value" (the distance from the center of the first hole to the rail end face) when ordering, otherwise the screw holes may not align.