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External Type LGD Series Roller Guide

Home · Products · Roller / Cylindrical Linear Guide Set · External Type LGD Series Roller Guide
  • External Type LGD Series Roller Guide
External Type LGD Series Roller Guide

External Type LGD Series Roller Guide

The LGD series is an externally mounted roller-type linear guide. Its core consists of a group of V-shaped bearing rollers rolling on an inverted V-shaped solid steel guide rail. The system features a completely open design with all components exposed, facilitating installation, adjustment, and maintenance. With its excellent load capacity, outstanding contamination resistance, and high tolerance for mounting surface errors, it is an ideal choice for heavy-duty automation, logistics transportation, and outdoor equipment.

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Technology

The core value of the external type LGD series roller guide lies in "providing simple and reliable strong support in harsh environments," complementing traditional enclosed ball bearing guides.

Performance Characteristics LGD Series External Roller Guides Traditional ball-bearing linear guides (such as the HGH series) Core Values
Core Positioning An open-type solution designed for heavy loads, harsh environments, long strokes and easy maintenance. A high-precision, high-speed, high-rigidity enclosed precision solution. Indispensable in applications where precision requirements are relatively lenient but environmental and load conditions are demanding.
System Architecture Open-type. The guide and roller assembly are exposed, eliminating sealing issues and making them resistant to dust and debris build-up. Enclosed design. The carriage encloses the guideway, relying on seals to prevent dust ingress. Naturally suited to dusty, chip-filled and damp environments such as woodworking, welding, foundries and outdoor settings.
Load Capacity Extremely high. The rollers and guide rails feature line contact with a large contact area, resulting in static and dynamic load capacities far exceeding those of ball guides of the same size. High. A single unit can withstand loads ranging from hundreds of kilograms to several tonnes, making it ideal for heavy-duty handling and positioning.
Installation and Commissioning Simple and highly tolerant of installation errors. With eccentric rollers or adjustable mounting plates, preload can be easily adjusted after installation to compensate for significant mounting errors (such as flatness and parallelism). Precision-oriented and demanding. Extremely strict requirements are placed on the flatness and parallelism of the mounting surface. Significantly reduces the installation complexity, labour hours and costs associated with long-travel guide rails, making it particularly suitable for on-site retrofitting.
Operating Speed and Accuracy Medium to high speed with good precision. Operation is smooth, with repeatability accuracy reaching the +0.1 mm level, sufficient to meet most heavy-load positioning requirements. High speed and high precision. Repeatability can reach the micrometre level. Achieves a perfect balance of speed and precision in heavy-duty applications, offering excellent value for money.
Maintenance and Service Life Extremely simple and long-lasting. The rollers are standard industrial bearings that can be quickly replaced individually when worn, whilst the guide rails are highly wear-resistant, resulting in extremely low maintenance costs. Maintenance is relatively complex and requires professional lubrication. Maximises equipment uptime whilst minimising overall maintenance costs.

Main Technical Parameters and Design
1. Core Components:
Guide Rail: High-strength solid steel square rail or profile, with a hardened V-shaped guiding surface on the top.
Roller Group: Composed of multiple V-groove bearing rollers, usually including load-bearing rollers and lateral guiding rollers, forming a clamping structure that provides four-way load capacity.
2. Adjustment Mechanism: The key eccentric roller shaft design allows for fine adjustment of the gap between the roller and the guide rail by rotating the eccentric shaft, achieving zero-gap preloading or pre-set clearance.
3. Selection Considerations:
Select specifications based on load: Primarily select the guide rail size (e.g., LGD30, LGD45) and the number of rollers based on vertical load and moment load.
Confirm mounting method: Top mounting, side mounting, or inverted mounting can be selected to flexibly adapt to various structures.
Consider the environment: Galvanized, stainless steel, or rollers with sealing covers can be selected to cope with corrosive or extremely dirty environments.

Applications
The external type LGD series roller guide is the king of heavy-duty, harsh environment applications:
Heavy-duty automation and logistics: Guiding for automated warehouse stacker cranes, heavy-duty AGVs, and container handling systems.
Construction machinery and agricultural equipment: Guiding support for mobile lifting platforms, combine harvester grain bins, and telescopic arms of construction vehicles.
Factory automation production lines: Heavy-duty slides for automotive welding lines, large workpiece transfer machines, and overhead conveyor systems for painting lines. Wood and Stone Processing: Beam moving guide rails for CNC woodworking machinery and stone cutting machines.

The external type LGD series roller guide represents a different philosophy in linear guidance: not pursuing ultimate precision, but rather ultimate reliability, durability, and adaptability. It solves the fundamental problem of heavy equipment movement in complex environments using simple, robust mechanical principles. Choosing the LGD series means prioritizing equipment uptime, ease of maintenance, and resistance to harsh working conditions. It's a "hardcore" product that engineers can rely on, forming the solid foundation for building robust, durable, and low-maintenance automation systems.

Parameters

Model No. Shaft
Diameter		 Dimensions of
Assembly(mm)		 Dimensions of Block(mm) Mounting holes No.
 Wheels
No.		 Dimensions of Rail(mm)
Basic power
Safe load N
Basic static load
Safe working load N		 Weight
Rail Block H W H1 H2 W1 L1 B C S1 W2 H3 h d1 d p
 p1
 Slider
Weight kg/pc		 Guide rail
Weight kg/m

LGD6
LGB6
φ6
29
60
26		 12 58 60 38 40
M5X8		 4 4 26 17.8 6.5 9 5.5 60 80 120 0.16 1.3
100 75 4 4/6 80 120 0.18
LGD8 LGB8 φ8 30  60  26  14  58  70  40  50  M5X8 4  4  28  20  7  8.6  5.5  50  80  130  0.2  2.3 
100  80  4  4/6 90  140  0.25 
LGD8E LGB8E φ8 33  67  27.5  14  65  70  45  45  M6X9 4  4  30  21  8  9.5  5.5  80  80  130  0.2  2.3 
100  75  4  4/6 90  140  0.25 
LGD12 LGB12 φ12 39  82  35  12  80  60  54  36  M6X12 4  2  36  25.5  8  10.5  6.5  100  50  100  150  0.32  3.1 
100  76  8/6 4/6 200  380  0.57 
140  116  8/6 4/6 270  435  0.73 
160  136  8  8  290  460  0.85 
LGD16 LGB16 φ16 50  120  45  14  118  150  90  120  M8×14 8  4  50  33  10  14  8.5  80  400  750  1.4  5.8 
190  150  8/6 4/6 430  790  1.6 

Drawings

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