LGC Series Cross Roller Guide
High Rigidity | High Precision | Non-Circulating Type
Product Overview
The LGC series is a high-rigidity, high-precision non-circulating linear motion guide. It utilizes precision cylindrical rollers arranged in an orthogonal (cross) pattern as the rolling elements, significantly reducing friction resistance while satisfying exceptionally high load capacity requirements.
- Japanese Precision Rollers: Employs precision rollers made in Japan (JIS B 1506 G2 grade) to ensure superior roundness, smooth rolling, and excellent wear resistance.
- Stainless Steel Construction: The V-groove rails are entirely crafted from high-grade stainless steel for outstanding corrosion resistance.
- High Load Capacity: The rigid rail structure and cross-roller configuration provide uniform load distribution in all directions, making it highly suitable for heavy-duty applications.
- Typical Applications: Widely used in optical measuring instruments, PCB drilling machines, X-ray equipment, precision positioning stages, and semiconductor manufacturing.
Technical Notes
Stroke Calculation: Because it is a non-circulating type, when the rail moves, the roller cage moves half the distance in the same direction. Therefore, the maximum stroke is strictly determined by the rail length relative to the cage length.
Lubrication: Rails are factory pre-lubricated with high-quality Lithium Soap Grease. Periodic re-lubrication is highly recommended to maintain smooth operation and extend service life.
Cage Shift Phenomenon: In high-speed, vertical, or uneven load applications, "cage shift" (cage creeping) may gradually occur. It is recommended to perform a full stroke cycle periodically to mechanically re-center the cage.
Lubrication: Rails are factory pre-lubricated with high-quality Lithium Soap Grease. Periodic re-lubrication is highly recommended to maintain smooth operation and extend service life.
Cage Shift Phenomenon: In high-speed, vertical, or uneven load applications, "cage shift" (cage creeping) may gradually occur. It is recommended to perform a full stroke cycle periodically to mechanically re-center the cage.
Complete Set Ordering Code
Example: LGC 3 A 200 R25 - H
| No. | Item | Options & Description |
|---|---|---|
| 1 | Series Code | LGC: Cross Roller Guide |
| 2 | Roller Diameter |
1: Φ1.5mm | 2: Φ2.0mm | 3: Φ3.0mm 4: Φ4.0mm | 6: Φ6.0mm |
| 3 | Assembly Type |
A: 3-Rail Type (1 Main + 2 Sub) B: 4-Rail Type (2 Main + 2 Sub) |
| 4 | Rail Length |
Total length in mm (e.g., 200). Note: For Type A (3-Rail), if the main and sub rails have different lengths, specify as Main x Sub (e.g., 200X100). |
| 5 | Roller Quantity |
R25: Represents 25 Rollers inside the cage. (Refer to the detailed dimension catalog for standard quantities corresponding to rail lengths). |
| 6 | Accuracy Grade |
H: High Grade P: Precision Grade |
Special Note: The LGC6 model is available in the B (4-Rail type) configuration only.
Component Ordering (Cage Assembly Only)
Example: LGC 3 R25
| No. | Item | Options & Description |
|---|---|---|
| 1 | Series Code | LGC: Cross Roller Guide Component |
| 2 | Roller Diameter |
1: Φ1.5mm | 2: Φ2.0mm | 3: Φ3.0mm 4: Φ4.0mm | 6: Φ6.0mm |
| 3 | Roller Quantity | R25: Represents a cage assembly containing exactly 25 rollers. |
Installation & Adjustment Specifications
1. Mounting Bolt Torque
| Model Size | Bolt Spec | Tightening Torque (N.m) |
|---|---|---|
| LGC1 | M1.4 x 0.3 | 0.14 |
| LGC2 | M2.0 x 0.4 | 0.40 |
| LGC3 | M3.0 x 0.5 | 1.40 |
| LGC4 | M4.0 x 0.7 | 3.20 |
| LGC6 | M5.0 x 0.8 | 6.60 |
2. Adjustment Screw (For Preload)
| Model Size | Screw Spec | Max Torque (N.m) |
|---|---|---|
| LGC1 | M2 | 0.008 |
| LGC2 | M3 | 0.012 |
| LGC3 | M4 | 0.050 |
| LGC4 | M4 | 0.080 |
| LGC6 | M5 | 0.200 |
3. Allowable Preload (μm)
Warning: Applying excessive preload will drastically shorten the operational life of the guide. Please strictly refer to the table below for the maximum allowable compression:
| Specification | LGC1 | LGC2 | LGC3 | LGC4 |
|---|---|---|---|---|
| Allowable Preload (Compression) | -2 μm | -3 μm | -4 μm | -5 μm |
