Product Overview & Features
The LRM Series is a highly compact, miniature linear guideway system specifically engineered for small-scale precision equipment, medical devices, and compact automation machinery.
-
Ultra-Compact Design: Miniature footprint allows for seamless integration into tightly constrained spaces without sacrificing load-bearing capabilities.
-
Stainless Steel Construction: Both the rail and the block are manufactured from premium stainless steel, providing exceptional corrosion resistance suitable for cleanrooms and sensitive environments.
-
Low Friction & Smooth Motion: The optimized ball circulation path ensures extremely low rolling friction, resulting in smooth, stable, and low-noise operation even at high speeds.
-
Pre-Lubricated: Units come factory pre-lubricated with high-grade Lithium soap-based grease, ready for immediate installation and operation.
-
Versatile Sizing: Available in rail widths of 5mm, 7mm, 9mm, 12mm, and 15mm, with both Standard (N) and Long (L) block specifications.
1. Assembled Set Ordering (Single Rail)
Example: LRM 7 N 1 X 40 S5 A H T
| No. |
Item |
Options / Description |
| 1 |
Series |
LRM: Miniature Linear Guide |
| 2 |
Surface Treat. |
Blank: Natural (Stainless) | BB: Black Chrome Plating |
| 3 |
Width |
5, 7, 9, 12, 15 (mm) |
| 4 |
Block Spec |
N: Standard | L: Long |
| 5 |
Block Qty |
1, 2, 3...: Quantity of blocks per rail |
| 6 |
Rail Length |
Length in mm (e.g., 40) |
| 7 |
Hole Pitch |
S: Standard (Equal ends) | Value: Custom end pitch (e.g., S5) |
| 8 |
Preload |
A: No Preload (Clearance) | B: Light Preload | C: Medium Preload |
| 9 |
Accuracy |
H: High | P: Precision |
| 10 |
Rail Lock |
Blank: Upper Lock (Top bolt) | T: Lower Lock (Bottom bolt) |
2. Jointed Rail Ordering
Used when the required rail length exceeds the maximum standard single-piece length.
Example: LRM 7 N 1 X 705 T 705 A H T
| Position |
Code |
Description |
| No. 6 |
1X705 |
1st Rail Segment Length (e.g., 705mm) |
| No. 7 |
T |
Joint Mark (Must align marks during installation) |
| No. 8 |
705 |
2nd Rail Segment Length |
Individual Component Ordering
1. Block Only (BK)
Example: LRM 7 BK - N - H - D
| Item |
Options & Description |
| Model |
LRM + Width (7/9/12/15) + BK (Block Only) |
| Spec |
N: Standard | L: Long |
| Accuracy |
H: High | P: Precision |
| Assembly Code |
A, B, C, D, E (Must match rail. See Assembly Table below) |
2. Rail Only (RL)
Example: LRM 7 RL X 985 - H - D - T
| Item |
Options & Description |
| Model |
LRM + Width + RL (Rail Only) |
| Joint / Length |
X: Jointed | Blank: Single. Followed by Length (mm) |
| Accuracy |
H: High | P: Precision |
| Assembly Code |
D, E... (Must match block) |
| Mounting |
Blank: Upper Lock | T: Lower Lock |
3. Assembly Code Matching Table
Crucial for ensuring correct fit when ordering blocks and rails separately.
| Target Preload Class |
Order Block Code |
Order Rail Code |
| B (Light Preload) |
D |
D |
| C (Medium Preload) |
E |
E |
| A (No Preload/Clearance) |
A / B / C |
- (Not applicable for matching) |
Maintenance & Handling
-
Lubrication Schedule: Pre-lubricated with Lithium soap-based grease (ISO VG32-68). Replenish grease every 100km of travel or every 3-6 months.
-
Dummy Rail Usage: Always use a plastic dummy rail when removing the block from the main rail to prevent the precision balls from falling out.
-
Temperature Limits: Maximum continuous operating temperature is 80°C. Momentary spikes up to 100°C are permissible.
-
Cleaning: If the guideway is washed, it must be dried and re-greased immediately to prevent oxidation.
Grease Replenishment Volume (cm³)
| Model |
Initial Volume (N / L) |
Replenish Volume (N / L) |
| LRM5 |
0.02 / 0.03 |
0.01 / 0.015 |
| LRM7 |
0.10 / 0.13 |
0.05 / 0.070 |
| LRM9 |
0.20 / 0.28 |
0.10 / 0.140 |
| LRM12 |
0.34 / 0.45 |
0.17 / 0.230 |
| LRM15 |
1.00 / 0.50 |
0.50 / - |
Accessories
Bolt Caps
Example: L - BC - M3 - 10P
-
L-BC: Identifies as Linear Guide Bolt Cap
-
M3: Bolt Size corresponding to the rail mounting hole (e.g., M3)
-
10P: Package Quantity (10 pcs per pack)
Technical Data & Specifications
1. Dimensions & Load Ratings
| Model |
Dimensions (mm) |
Load (kN) |
Static Moment (N.m) |
| Height (H) |
Width (W) |
Length (L) |
Dynamic (C) |
Static (Co) |
Mp |
My |
Mr |
| LRM5N |
6 |
12 |
18.2 |
0.33 |
0.55 |
1.68 |
0.99 |
0.99 |
| LRM5L |
6 |
12 |
21.2 |
0.48 |
0.90 |
2.40 |
2.08 |
2.08 |
| LRM7N |
8 |
17 |
24.3 |
1.02 |
1.53 |
5.42 |
3.17 |
3.17 |
| LRM7L |
8 |
17 |
32.5 |
1.43 |
2.45 |
9.27 |
7.96 |
7.96 |
| LRM9N |
10 |
20 |
31.0 |
1.97 |
2.60 |
11.8 |
8.19 |
8.19 |
| LRM9L |
10 |
20 |
42.1 |
2.61 |
4.11 |
19.7 |
18.9 |
18.9 |
| LRM12N |
13 |
27 |
37.6 |
3.04 |
3.86 |
23.6 |
12.5 |
12.5 |
| LRM12L |
13 |
27 |
48.4 |
3.96 |
5.90 |
40.9 |
32.5 |
32.5 |
| LRM15N |
16 |
32 |
48.0 |
4.27 |
5.70 |
45.0 |
23.0 |
23.0 |
| LRM15L |
16 |
32 |
65.0 |
6.53 |
9.53 |
70.0 |
63.6 |
63.6 |
2. Accuracy Grades (mm)
| Item |
High (H) |
Precision (P) |
| Height H Tolerance |
±0.02 |
±0.01 |
| Width N Tolerance |
±0.025 |
±0.015 |
| Pair Height Variation |
0.015 |
0.007 |
| Pair Width Variation |
0.020 |
0.010 |
3. Preload Classes (Radial Clearance μm)
| Preload Class |
LRM5 |
LRM7 |
LRM9 / 12 / 15 |
| A (No Preload) |
-1 ~ +2 |
-2 ~ +2 |
-2 ~ +3 |
| B (Light) |
-3 ~ -1 |
-4 ~ -2 |
-6 ~ -2 |
| C (Medium) |
-6 ~ -2 |
-7 ~ -3 |
-9 ~ -5 |
4. Installation (Shoulder Height & Torque)
| Model |
Shoulder H1 (mm) |
Shoulder H2 (mm) |
Rail Bolt Size |
Tightening Torque (N.cm) [Steel] |
| LRM5 |
1.2 |
1.5 |
M2 |
58.8 |
| LRM7 |
1.2 |
1.5 |
M2 |
58.8 |
| LRM9 |
1.7 |
2.0 |
M3 |
196 |
| LRM12 |
1.7 |
2.0 |
M3 |
196 |
| LRM15 |
3.2 |
3.5 |
M3 |
196 |
