Product Overview
Micro Linear Guide is engineered for applications where installation space is measured in millimeters, but motion performance is not compromised. The MGN series uses a 45° Gothic arch groove structure that distributes radial, counter-radial, and lateral loads equally across four rows of balls - giving compact equipment the same multi-directional rigidity as larger guide systems.
Rail width ranges from 5 mm (MGN5) to 15 mm (MGN15), with slider heights starting at 6 mm. All-stainless-steel construction makes the MGN series suitable for cleanroom environments, humid conditions, and applications where long-term corrosion resistance is required.
An optional self-lubricating unit extends lubrication intervals significantly, reducing maintenance interventions in automated lines where access is restricted.
Specifications
| Model | Rail Width H (mm) | Slider Width W (mm) | Dynamic Load C (kN) | Static Load C₀ (kN) | Slider Weight (kg) | Rail Weight (kg/m) |
|---|---|---|---|---|---|---|
| MGN 5C | 6 | 12 | 0.54 | 0.84 | 0.008 | 0.15 |
| MGN 7C | 8 | 17 | 0.98 | 1.24 | 0.010 | 0.22 |
| MGN 7H | 8 | 17 | 1.37 | 1.96 | 0.015 | 0.22 |
| MGN 9C | 10 | 20 | 1.86 | 2.55 | 0.016 | 0.38 |
| MGN 9H | 10 | 20 | 2.55 | 4.02 | 0.026 | 0.38 |
| MGN 12C | 13 | 27 | 2.84 | 3.92 | 0.034 | 0.65 |
| MGN 12H | 13 | 27 | 3.72 | 5.88 | 0.054 | 0.65 |
| MGN 15C | 16 | 32 | 4.61 | 5.59 | 0.059 | 1.06 |
| MGN 15H | 16 | 32 | 6.37 | 9.11 | 0.092 | 1.06 |
Note: 1 kgf = 9.81 N. Full dimensional drawing available on request.
C vs H: Which Slider Should You Choose
The MGN series offers two slider lengths for each rail size.
When in doubt: if your load is centered and light, choose C. If your mounting geometry creates offset loads, choose H.
Preload Grade Selection
Preload determines the interference fit between slider and rail. The wrong grade causes either positioning drift (too low) or excessive heat and motor overload (too high).
| Preload Grade | Code | Recommended For |
|---|---|---|
| Light | Z0 | High-speed, low-load axes; pick-and-place; laser positioning |
| Medium | ZA | General automation, medical imaging stages, most miniature axes |
| Heavy | ZB | Impact loads, gantry structures, heavy cutting |
For most MGN series applications - semiconductor wafer handling, optical inspection, fluid dispensing - ZA (medium) is the standard starting point.
Not sure which grade fits your application? Send us your load and speed parameters and our engineers will confirm the selection before you order.
Typical Applications
The MGN series is specified in:
Semiconductor & FPD manufacturing
Wafer transfer, lens positioning, inspection stage axes
Medical devices
Pipette robots, imaging slide stages, surgical tool positioning
Laboratory automation
Liquid handling, sample transfer, PCR plate movement
Industrial robotics
End-effector linear axes, collaborative robot joints
Key Capabilities
| Capability | Detail |
|---|---|
| Rail width range | 5 mm – 15 mm |
| Minimum slider height | 6 mm (MGN5) |
| Load directions | Four-directional equal load (radial, counter-radial, lateral) |
| Groove geometry | 45° Gothic arch |
| Material | Martensitic stainless steel |
| Environment | Cleanroom compatible, humid and corrosive environment rated |
| Lubrication | Standard grease / optional self-lubricating unit |
| THK / HIWIN compatibility | Yes, consult for specific model confirmation |
Why Baili
Monthly output capacity of 100,000 sets
Capable of supporting high-volume production schedules without extended lead times
Japanese and German CNC grinding equipment
Imported machines used throughout the grinding and finishing process
CMM coordinate measuring
Every batch inspected with a coordinate measuring machine; traceable inspection reports available on request
ISO and CE certified
Documentation provided on request
~20 national patents
Covering guide rail structure, manufacturing processes, and assembly methods
14,000 m² factory
Five dedicated workshops: housing production, optical axis, slider assembly, inspection, and packaging
Standard lead time: 7–15 days for standard specifications. MOQ: 1 piece.
Our Advantages
Preload grade is one of the most consequential decisions in miniature motion selection - and one of the easiest to get wrong. A Miniature Linear Guideway running heavy preload in a high-speed semiconductor axis will generate heat that expands the rail geometry and degrades positioning consistency over time. The reverse is equally costly: light preload on an application with moment loads produces direction-reversal backlash that no controller tuning can compensate for. Since preload is fixed at the factory by ball size, there is no field adjustment - the decision has to be right before the order is placed.
Read the full guide: How to Choose the Right Preload for Your Guide Rails →
FAQ
Q: Are MGN series guides compatible with THK or HIWIN rails?
A: The MGN series is dimensionally compatible with THK and HIWIN equivalents in most standard sizes. Please confirm your specific model with us before substituting, as machined hole patterns may vary by rail generation.
Q: Can you supply custom rail lengths?
A: Yes. Standard lengths are available from stock. Custom lengths are produced to order - typical lead time 7–15 days depending on quantity.
Q: Do you provide inspection reports?
A: Yes. CMM inspection reports with traceable measurement data are available on request for each batch.
Q: Can I get samples before placing a bulk order?
A: Yes. Samples are available; freight is covered by the buyer.
Q: What surface treatment does the MGN series use?
A: Rails are nickel-plated as standard. Anti-rust oil is applied before packaging. Custom surface treatments are available on request.
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