Le choix d'un rail de guidage linéaire de dimensions inadaptées peut entraîner des vibrations, une capacité de charge insuffisante et une précision d'usinage médiocre sur les machines CNC. De nombreux acheteurs se basent uniquement sur la largeur du rail pour faire leur choix, sans tenir compte du type de chariot, de la précharge, de la rigidité et des exigences liées à l'application.
An HGR linear guide uses a precision rail and carriage system designed for CNC machines, automation equipment, and industrial motion systems. Common sizes such as HGR15, HGR20, HGR25, and HGR30 are selected according to load requirements, machine structure, and precision level.
Le Guidage linéaire HGR belongs to the HIWIN HG series, which is one of the most widely used profile rail guide designs in CNC and automation applications.
The HG series uses a four-row ball-type design with equal load capacity in four directions. This structure provides:
For machine builders, choosing the correct rail size is important because the size affects:
The most common HGR sizes include:
| Modèle | Rail Width | Typical Application |
| HGR15 | 15 mm | Small CNC, 3D printers, light automation |
| HGR20 | 20 mm | CNC routers, engraving machines |
| HGR25 | 23 mm | Medium CNC equipment |
| HGR30 | 28 mm | Heavy CNC machines and automation |
An HGR linear guide is a profile linear guide system consisting of:
The rail provides the fixed motion path, while the carriage moves along the rail with low friction.
Unlike traditional slide rails, HGR guideways use circulating rolling elements that recirculate inside the carriage.
This allows the system to achieve:
In CNC applications, the linear guide works together with other motion components such as:
to create a complete CNC motion system.
LONGQIAO supplies CNC motion components for global machine manufacturers, including linear guide rails, ball screws, servo systems, and transmission components.
HGR15 Dimensions
The HGR15 linear guide is one of the smallest sizes in the HG series.
Typical specifications:
| Paramètres | HGR15 |
| Rail width | 15 mm |
| Application | Light CNC and automation |
| Structure | Four-row ball design |
| Précision | Haute précision |
| Capacité de charge | Light-medium load |
The HGR15 is suitable for applications requiring compact dimensions.
Common uses:
The HGR15 rail provides:
Because of its smaller size, it is ideal where installation space is limited.
For example:
A small CNC engraving machine may use HGR15 linear rails because the machine does not require extremely heavy cutting forces.
The HGR20 linear guide is one of the most popular sizes for CNC applications.
It provides a good balance between:
HGR20 Dimensions
| Paramètres | HGR20 |
| Rail width | 20 mm |
| Application | CNC routers and automation |
| Capacité de charge | Moyen |
| Précision | Haut |
| Structure | Four-row ball bearing design |
The HGR20 linear guide is widely selected because it offers improved rigidity compared with smaller rails.
Applications include:
For CNC router manufacturers, HGR20 linear rails provide:
The HGR25 linear guide is a medium-size HIWIN linear rail solution designed for applications that require higher load capacity and stronger rigidity than HGR15 and HGR20.
It is commonly selected for machines that need a balance between:
The HGR25 is widely used in:
The typical specifications of the HGR25 linear guide include:
| Paramètres | HGR25 |
| Rail width | 23 mm |
| Application | Medium CNC equipment |
| Capacité de charge | Medium-high |
| Précision | Haute précision |
| Structure | Four-row ball bearing design |
Compared with HGR20, the HGR25 provides:
For CNC machines with heavier cutting forces, HGR25 is often a more suitable choice.
The HGR25 rail is designed for applications requiring more stable movement.
Parmi les principaux avantages, on peut citer :
Higher Rigidity
The larger rail size improves stiffness and reduces deflection during operation.
This helps maintain:
Higher Load Capacity
Compared with smaller rails, HGR25 can handle heavier loads.
It is suitable for:
Stable Precision Performance
The HG series design allows the carriage to maintain smooth motion even under changing loads.
This makes HGR25 suitable for precision equipment.
The HGR30 linear guide is one of the larger models in the HG series.
It is designed for applications requiring:
Heavy load capacity
HGR30 Dimensions
| Paramètres | HGR30 |
| Rail width | 28 mm |
| Application | Heavy CNC machinery |
| Capacité de charge | Haut |
| Rigidity | Haut |
| Structure | Four-row ball design |
The HGR30 rail is commonly used in:
For heavy-duty applications, the larger rail structure helps reduce:
A heavy machine requires stronger motion components.
The HGR30 provides:
Capacité de charge élevée
The larger carriage and rail structure allow the system to support higher forces.
High Rigidity
The HGR30 improves machine stability during:
Longue durée de vie
With proper lubrication and installation, HGR30 linear guides can maintain reliable performance for long-term industrial operation.
Choosing between HGR models requires understanding the differences.
| Modèle | Rail Size | Load Capability | Recommended Application |
| HGR15 | 15 mm | Light | 3D printers, small CNC |
| HGR20 | 20 mm | Moyen | CNC routers, engraving machines |
| HGR25 | 23 mm | Medium-High | CNC machines, automation |
| HGR30 | 28 mm | Haut | Heavy CNC and industrial machinery |
The correct linear guide rail size depends on several factors.
1. Machine Type
Different machines require different guideways.
| Machine | Recommended Model |
| 3D printer | HGR15 |
| Desktop CNC | HGR15/HGR20 |
| CNC router | HGR20/HGR25 |
| CNC mill | HGR25/HGR30 |
| Heavy CNC machine | HGR30 |
2. Load Requirement
Load capacity is one of the most important selection factors.
Réfléchissez à ceci :
A heavier machine usually requires a larger rail.
For example:
A CNC router cutting aluminum may need a stronger system than a woodworking CNC router.
3. Required Precision
Different applications require different accuracy levels.
For:
customers normally select higher precision HG series linear guideways.
4. Installation Space
The available mounting area affects rail selection.
Small machines may not have enough space for HGR30.
Compact systems often use:
Large industrial machines usually have enough structure for:
Preload is an important factor when selecting a precision linear guide.
Preload removes internal clearance between:
Avantages :
Common preload options include:
| Preload | Application |
| Light preload | General automation |
| Medium preload | CNC machines |
| Heavy preload | Precision equipment |
Choosing the correct preload improves:
Correct installation directly affects performance.
Important factors include:
Rail Alignment
The rail must maintain proper alignment to avoid uneven loading.
Parallel Installation
Multiple rails should maintain accurate parallel positioning.
Incorrect installation may cause:
Lubrication
Proper lubrication protects:
A good maintenance plan helps maintain smooth motion.
LONGQIAO / LQ supplies linear guide rails and CNC motion components for global customers.
Our solutions support:
Products include:
LONGQIAO provides direct sourcing for customers requiring stable CNC components.
Avantages :
For distributors and machine brands, we support:
Instead of purchasing from multiple suppliers, customers can source complete motion components from one partner.
Including:
This improves:
Choosing the correct HGR linear guide improves CNC machine accuracy, reliability, and production efficiency.
Before contacting LONGQIAO, please prepare:
Our team can support:
✔ HGR linear guide selection
✔ CNC motion system matching
✔ OEM customization
✔ Private label cooperation
✔ Bulk export supply
Contact LONGQIAO today for reliable HGR linear guide solutions and build a stable CNC motion system for your next project.
The main factors include machine type, working load, travel distance, accuracy requirement, preload, and installation space. Providing these details helps suppliers recommend the most suitable linear guide system.
Yes. HGR linear guides are widely used in CNC routers because they provide smooth motion, good rigidity, and reliable positioning accuracy.
The service life depends on several factors:
Proper selection and maintenance can significantly extend service life.
Yes. LONGQIAO supports OEM, ODM, and private label cooperation, including customized specifications, packaging, and integrated CNC component sourcing.
Yes. Besides linear guides, LONGQIAO supplies ball screws, servo motors, stepper motors, planetary gearboxes, and other CNC transmission components.
