LRW Series Miniature Wide Linear Guide
High Moment Load Capacity | Anti-Corrosion | Compact Design
Product Features
- Wide Rail Design: The widened rail profile significantly increases the moment load capacity, making it capable of handling large single-axis moments without the need for a dual-rail setup.
- High Rigidity & Precision: Employs a Gothic arch groove design with a 45-degree contact angle, providing equal load capacity in radial, reverse radial, and lateral directions.
- Anti-Corrosion Material: Both the linear block and rail are manufactured from martensitic stainless steel, ensuring excellent rust resistance suitable for cleanrooms and medical equipment.
- Compact & Lightweight: The miniature size makes it highly ideal for compact equipment such as 3D printers, small semiconductor devices, and precision optical instruments.
- Interchangeability: Engineered with tight tolerances, allowing blocks and rails to be freely interchanged within the same accuracy class for easy maintenance.
Assembled Set Ordering
Example: LRW 7 N 1 X 40 S5 A H T
Use this code when ordering a complete rail and block assembly.
| No. | Item | Options & Description |
|---|---|---|
| 1 | Series Code | LRW: Miniature Linear Guide (Wide Type) |
| 2 | Surface Treatment |
Blank: Natural Stainless Steel BB: Rail & Block Black Chrome Plated |
| 3 | Rail Width | 7: 14mm Rail | 9: 18mm Rail | 12: 24mm Rail | 15: 42mm Rail |
| 4 | Block Spec |
N: Standard Block L: Long Block |
| 5 | Block Quantity | 1, 2, 3... : Quantity of blocks per rail |
| 6 | Rail Length | Total length in mm (e.g., 40, 1000) |
| 7 | Hole Pitch (Ends) |
S: Standard (Equal ends) Value: Custom End Distance in mm (e.g. S5) |
| 8 | Preload Class |
A: No Preload (Clearance) B: Light Preload C: Medium Preload |
| 9 | Accuracy Grade | N: Normal | H: High | P: Precision |
| 10 | Rail Lock Type |
Blank: Upper Lock (Mount from top) T: Lower Lock (Tapped from bottom) |
Jointed Rail Ordering
Example: LRW 7 N 1 X 1030 T 1030 A H T
Used for rails longer than the maximum single-piece length (Lmax). "T" indicates the joint mark.
1. Block Only Ordering
Example: LRW 7 BK - N - H - D
| Item | Options & Description |
|---|---|
| Model Code | LRW + Width (7/9/12/15) + BK (Block) |
| Surface | Blank: Natural | *B: Block Black Chrome |
| Spec | N: Standard Block | L: Long Block |
| Accuracy | N: Normal | H: High |
| Assembly Match | A, B, C, D, E (Preload Match Code) |
2. Rail Only Ordering
Example: LRW 7 RL X 2000 - H - D - T
| Item | Options & Description |
|---|---|
| Model Code | LRW + Width (7/9/12/15) + RL (Rail) |
| Surface | Blank: Natural | *B: Rail Black Chrome |
| Length | Rail Total Length in mm (e.g., X 2000) |
| Accuracy | N: Normal | H: High |
| Assembly Match | D, E (Preload Match Code) |
| Lock Type | Blank: Upper Lock | T: Lower Lock |
3. Accessories (Bolt Caps)
Example: L - BC - M3 - 10P
L-BC: Bolt Cap. M3: Bolt Size. 10P: 10 pcs/pack. (Note: M3 fits LRW7; M4 fits LRW12/15).
Rail Dimensions & Specifications
| Model Series | Hole Pitch (P) | Standard Edge (S/E) | Min. Edge | Max. Edge | Max. Length (Lmax) |
|---|---|---|---|---|---|
| LRW7 | 30 mm | 10 / 20 mm | 3 mm | 26 mm | 2020 mm |
| LRW9 | 30 mm | 10 / 20 mm | 3 mm | 26 mm | 2020 mm |
| LRW12 | 40 mm | 15 / 30 mm | 4 mm | 35 mm | 2020 mm |
| LRW15 | 40 mm | 15 / 30 mm | 4 mm | 35 mm | 2020 mm |
Accuracy Grades (mm)
| Tolerance Item | Normal (N) | High (H) | Precision (P) |
|---|---|---|---|
| Height H Tolerance | ±0.04 | ±0.02 | ±0.01 |
| Height Pair Variation | 0.03 | 0.015 | 0.007 |
| Width W Tolerance | ±0.04 | ±0.025 | ±0.015 |
| Width Pair Variation | 0.03 | 0.02 | 0.01 |
Preload Classes (Radial Clearance μm)
| Preload Class | LRW7 / LRW9 | LRW12 / LRW15 |
|---|---|---|
| A (None / Clearance) | -2 ~ +2 | -2 ~ +3 |
| B (Light Preload) | -4 ~ -2 / -5 ~ -2 | -6 ~ -2 / -7 ~ -2 |
| C (Medium Preload) | -7 ~ -3 / -8 ~ -4 | -9 ~ -5 / -10 ~ -6 |
Installation & Lubrication Data
Grease Type: Factory lubricated with Lithium Soap Grease PS NO.2. Re-lubricate every 100km of travel or every 3-6 months.
Mounting Shoulder Height & Bolt Torque
| Model | Rail Shoulder (H1 mm) |
Block Shoulder (H2 mm) |
Bolt Torque (Steel, N.cm) |
|---|---|---|---|
| LRW7 | 3 | 1.6 | 196 (M3) |
| LRW9 | 3 | 2.7 | 196 (M3) |
| LRW12 | 4 | 2.7 | 412 (M4) |
| LRW15 | 5 | 3.2 | 412 (M4) |
Grease Volume (cm³)
| Model (Block Spec) | Initial Volume | Replenish Volume |
|---|---|---|
| LRW7N / LRW7L | 0.17 / 0.20 | 0.09 / 0.10 |
| LRW9N / LRW9L | 0.27 / 0.36 | 0.14 / 0.18 |
| LRW12N / LRW12L | 0.45 / 0.60 | 0.23 / 0.30 |
| LRW15N / LRW15L | 0.81 / 1.06 | 0.41 / 0.53 |
Allowable Preload (Compression): Applying excessive external preload will drastically shorten the operational life. Maximum allowable compressions: LRW1 (-2μm), LRW2 (-3μm), LRW3 (-4μm), LRW4 (-5μm).
