AirTAC LSH20BK-HN-N-B-M6 Linear Guide Block | 20mm Compact Low-Profile High-Precision Block

Model: LSH20BK-HN-N-B-M6

1. Executive Summary

The AirTAC LSH20BK-HN-N-B-M6 is the 20mm standard square block from the LSH Heavy Load Linear Guide series.

This model features a flange-less, compact design (BK type) paired with the "golden size" 20mm rail, making it the most versatile core component for light automation, 3D printing, and electronic equipment. While maintaining a low assembly height of 30mm, it provides industrial-grade load capacity and rigidity. It is a highly cost-effective alternative to models like the HIWIN HGH20CA or THK HSR20B.

2. Model Code Decoding

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Please note the following:

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

• 20: Size Specification — Nominal rail width 20mm.

  • Positioning: Lighter and shorter than the 25mm series (30mm height), suitable for small and medium-sized equipment.

• BK: Block Type — Square Block.

  • Core Feature: No side flanges (wings); block width is only 44mm.

  • Mounting: Threaded holes are machined directly into the block. Screws pass through the workbench and lock directly into the block. Ideal for installation environments with narrow lateral space.

• HN:

  • H: Accuracy Class — Class H (High).

  • N: Preload Class — N (Standard Preload), ensuring smooth running with minimal resistance.

• N: Dust Protection Code — Standard Dust Protection (end seals).

• B: Rail Hole/Packaging Code — Compatible with Type B Mounting Holes / Independent Packaging.

  • Indicates that this block is compatible with standard Type B (counterbore) rails, and usually denotes a standard shipping state (not part of a specific pairing set).

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

3. Core Technical Advantages

A. Compact Square Design

Compared to the Flange Type (F1N), the width of the LSH20BK square block is reduced from 63mm to 44mm. This "slimmed-down" design allows for easy side-by-side installation in dense mechanical structures or mounting within width-restricted aluminum profile grooves.

B. Versatility of the 20mm Specification

The 20mm size is one of the most widely used dimensions in the automation industry. It offers better rigidity (bending resistance) than the 15mm series while being lighter and more economical than the 25mm series. For motion platforms with loads under 100kg, the LSH20 offers the optimal balance point.

C. High Assembly Heavy Load Design

Despite its small size, the LSH20 series retains the heavy-duty design featuring 4 rows of ball bearings and a 45-degree contact angle. This allows it to perform significantly better than dual-row (light load) guides when subjected to vertical or lateral impact loads.

D. International Standard Interchangeable Dimensions

Strictly adheres to industry-standard mounting dimensions.

• Equivalent Models: Can directly replace HIWIN HGH20CA, THK HSR20B, etc. (mounting hole pitch must be confirmed).

4. Technical Specifications

Note the differences from the 25mm and Flange type blocks:

5. Target Applications

The LSH20BK-HN-N-B-M6 is the ideal choice for the following compact equipment:

• 3C Automation Assembly Lines: Dispensing or screw-driving stations for mobile phones and tablets.

• Small Laser Marking Machines: X/Y axis motion modules.

• Medical and Biochemical Equipment: Test tube transfer mechanisms (requiring smooth, low-noise operation).

• Parallel Manipulators: Guidance columns in space-restricted environments.

• XYZ Modules: The vertical axis (Z-axis) often uses square blocks to reduce overall volume.