MGN12 Block for Compact Linear Motion Systems
MGN12 block is a miniature linear guide block used with 12 mm linear guide rails. It is designed for compact equipment where installation space is limited, but smooth linear movement, stable positioning and reliable load support are still required.
DLY supplies MGN12C compact blocks and MGN12H extended blocks for different mounting lengths and load requirements. The block can be selected together with matching rails, rail lengths, dust protection options and mounting dimensions according to the actual machine structure.
What Is an MGN12 Block?
The MGN12 block is the moving carriage of a miniature linear guideway. Steel balls circulate between the block and the rail, allowing the mounted part to move in a straight line with low friction. Compared with ordinary sliding parts, this structure provides smoother movement and better positioning stability in small automation systems.
The number "12" refers to the matching rail size. MGN12 blocks are commonly used where a low-profile structure, light weight and accurate linear travel are more important than very high load capacity. For longer support length or higher moment resistance, the MGN12H extended block is usually selected instead of the shorter MGN12C block.
Main Structure of the MGN12 Linear Block
The MGN12 block includes the block body, end caps, end seals, circulating balls, retainer and bottom sealing structure. These parts work together to support precise movement, keep the balls circulating smoothly and reduce the entry of dust or small particles during operation.
Compact Block Body
The block body provides the mounting platform for small moving parts, fixtures, sensors or positioning plates. Its compact width and low profile make it suitable for limited installation space.
End Seals and End Caps
End seals help protect the internal ball circulation path from dust and impurities, while end caps guide the steel balls back into the circulation channel.
Ball Circulation Design
The internal rolling ball structure reduces friction during travel and supports smooth linear movement in compact mechanical assemblies.
MGN12C and MGN12H Model Selection
MGN12C and MGN12H use the same 12 mm rail size, but the block length is different. MGN12C is shorter and lighter, which is suitable for compact moving parts. MGN12H has a longer body, higher rated load and stronger moment resistance, making it more suitable for applications where the moving plate is longer or the load center is farther from the rail.
| Model | Block Type | Main Feature | Typical Selection |
|---|---|---|---|
| MGN12C | Compact block | Shorter body and lighter weight | Small moving parts, short carriage plates and compact equipment |
| MGN12H | Extended block | Longer body with higher load and moment capacity | Longer mounting plates, higher stability requirements and larger moment loads |
| MGN12C-O / MGN12H-O | Optional configuration | Model suffix should be confirmed according to rail and sealing configuration | Projects requiring specific matching with existing rail or drawing dimensions |
MGN12 Block Dimensions and Load Data
The following specifications are used for model confirmation, replacement checking and rail-block matching before ordering. For projects with existing drawings, please confirm the block length, rail width, mounting hole distance and required rail length together.
| Model | Combination Height | Block Width | Mounting Pitch | Block Length | Rail Size | Rail Hole | Rated Load | Static Moment | Weight |
|---|---|---|---|---|---|---|---|---|---|
| MGN12C | H 13 mm h1 3 mm n 7.5 mm |
27 mm | B 20 mm B1 3.5 mm C 15 mm |
34.7 mm | Width 12 mm Height 8 mm |
Aperture 6 mm Pitch 25 mm M3 × 8 |
2.84 kN | Mr 25.48 N·m Mp 13.72 N·m My 13.72 N·m |
Block 0.034 kg Rail 0.65 kg/m |
| MGN12H | H 13 mm h1 3 mm n 7.5 mm |
27 mm | B 20 mm B1 3.5 mm C 15 mm |
46 mm | Width 12 mm Height 8 mm |
Aperture 6 mm Pitch 25 mm M3 × 8 |
3.72 kN | Mr 38.22 N·m Mp 36.26 N·m My 36.26 N·m |
Block 0.054 kg Rail 0.65 kg/m |
| MGN12C-O | H 13 mm h1 3 mm n 7.5 mm |
27 mm | B 20 mm B1 3.5 mm C 15 mm |
34.7 mm | Width 12 mm Height 8 mm |
Aperture 6 mm Pitch 25 mm M3 × 8 |
2.84 kN | Mr 25.48 N·m Mp 13.72 N·m My 13.72 N·m |
Block 0.025 kg Rail 0.65 kg/m |
| MGN12H-O | H 13 mm h1 3 mm n 7.5 mm |
27 mm | B 20 mm B1 3.5 mm C 15 mm |
46 mm | Width 12 mm Height 8 mm |
Aperture 6 mm Pitch 25 mm M3 × 8 |
4.27 kN | Mr 38.4 N·m Mp 37.49 N·m My 37.49 N·m |
Block 0.047 kg Rail 0.65 kg/m |
Note: For replacement projects, confirm both the block model and the rail dimensions before ordering. If only the block is replaced, the rail profile, accuracy level and actual wear condition should also be checked.
Dust Protection and Mounting Clearance
MGN12 blocks can be equipped with dust protection parts according to the working environment. End seals help prevent dust and small impurities from entering the block from both ends. For applications with more particles or exposed installation positions, bottom dust sheets can be considered when the mounting clearance allows.
| Model Series | Dust Sheet | H1 Clearance | Selection Note |
|---|---|---|---|
| MDN 7 | Not available | - | Very small bottom clearance |
| MDN 9 | Available | 1 mm | Confirm side bearing surface height before installation |
| MDN 12 | Available | 2 mm | Suitable for MGN12 block dust protection selection |
| MDN 15 | Available | 3 mm | Used when the larger miniature guide size is selected |
| MDW 7 | Not available | 1 mm | Confirm wide rail structure separately |
| MDW 9 | Available | 2.1 mm | For wider miniature rail structures |
| MDW 12 | Available | 2.6 mm | Confirm mounting clearance before adding dust sheet |
| MDW 15 | Available | 2.6 mm | Suitable for wider miniature guide rail systems |
When a side bearing surface is used, its height should be lower than the available H1 clearance. This helps avoid interference between the block and the mounting shoulder during movement.
Where MGN12 Blocks Are Commonly Used
MGN12 blocks are suitable for small linear motion systems where the moving parts must remain stable, compact and easy to install. They are often selected for precision equipment, compact automation mechanisms and small positioning structures.
Medical and Laboratory Devices
Used in small moving platforms, sampling mechanisms and compact inspection equipment that require smooth and stable movement.
Semiconductor and Electronic Equipment
Suitable for compact positioning structures in electronic assembly, inspection and small automation machines.
Precision Measuring Instruments
Provides controlled linear movement for measuring stages, optical instruments and small adjustment mechanisms.
Office and Compact Automation Equipment
Used in printers, scanners, small actuators and compact motion assemblies where space and smooth travel are important.
How to Choose the Right MGN12 Block
For a new design, model selection should start from the available installation space, load direction, rail length and mounting hole layout. For replacement projects, the existing rail profile and block dimensions must be checked carefully before confirming the order.
| Selection Item | What to Confirm | Why It Matters |
|---|---|---|
| Block length | MGN12C or MGN12H | A longer block improves support and moment resistance, while a shorter block saves space. |
| Rail size | 12 mm rail width and matching rail profile | The block and rail must match correctly for smooth movement and proper ball circulation. |
| Rail length | Required stroke, end margin and mounting hole position | Correct rail length reduces assembly changes and improves installation efficiency. |
| Dust protection | End seals, bottom dust sheet and H1 clearance | Proper sealing helps protect the block in dusty or exposed working environments. |
| Quantity and packaging | Block only or complete rail-and-block set | Clear order information helps avoid mismatched rails, missing blocks or incorrect rail length. |
DLY Supply Support for MGN12 Blocks
DLY supports model confirmation, rail length matching and complete miniature linear guideway supply. Customers can order MGN12 blocks alone or together with matching guide rails according to the equipment structure and installation drawing.
For OEM equipment, maintenance replacement and small batch testing, DLY can help check key dimensions before quotation, including block type, rail width, rail length, mounting pitch and dust protection requirements. MOQ can be discussed according to the model and stock condition.
FAQ About MGN12 Blocks
Q: What is the difference between MGN12C and MGN12H?
A: MGN12C is the compact block with a shorter body, while MGN12H is the extended block with a longer body. MGN12H provides higher load and moment capacity, while MGN12C is better when the installation space is very limited.
Q: Can I order only the MGN12 block without the rail?
A: Yes. The block can be ordered separately, but the existing rail profile and size must match the block. For replacement projects, please provide the current block model, rail width, block dimensions or clear photos for confirmation.
Q: Can DLY supply MGN12 block and rail as a complete set?
A: Yes. DLY can supply MGN12 blocks together with matching 12 mm guide rails. Rail length, number of blocks per rail and mounting hole requirements can be confirmed before quotation.
Q: When should I choose the extended MGN12H block?
A: MGN12H is recommended when the moving plate is longer, the load is higher, or the application has a larger moment load. It offers better support than the shorter compact block.
Q: What information is needed for an MGN12 block quotation?
A: Please provide the model, quantity, whether rails are needed, rail length, number of blocks per rail, accuracy or preload requirement if specified, and the working environment. Drawings or photos are helpful for replacement projects.
Q: Does the MGN12 block need lubrication?
A: Yes. Proper lubrication helps reduce wear and maintain smooth movement. The lubrication method and maintenance interval should be selected according to speed, load, working environment and machine duty cycle.
Need Help Confirming MGN12 Block Dimensions?
Send us your model, rail length, quantity, drawing or photos. DLY can help confirm the suitable MGN12 block, rail length and complete miniature linear guideway set for your equipment.
Email: export@dlybearing.com
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