Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø25mm bore and 400mm stroke, G1/8 air ports and a fixed rubber bumper. Its compact riveted body suits push, hold and clamp motion in tight machine spaces.
- BoreØ25 mm
- Stroke400 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionRubber bumper (MBLC variant: adjustable air cushion)
About the Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU
The AirTAC MBL25X400SU is a double-acting aluminum mini round cylinder engineered for compact installations requiring a lengthy 400 mm extension. Operating at 0.5 MPa, it generates 245 N of push force and 206 N of pull force, making it well-suited for moving lighter payloads across long linear distances. The riveted rolling-packed barrel permanently crimps the front and rear covers to the tube, yielding a featherweight assembly that slips into cramped machine cells where larger profile cylinders cannot fit.
This specific SKU features a U flat-end back cover for rigid fixed mounting and includes a built-in magnet (-S) for non-contact position detection. The internal heterogeneous two-way piston seal actively retains grease for extended lifespan, while the Ø10 mm carbon-steel piston rod is protected by a 20 µm hard-chrome plating to resist wear and corrosion. End-of-stroke deceleration relies on a fixed rubber bumper rather than an adjustable cushion screw.
Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Rubber bumper (MBLC variant: adjustable air cushion) |
| Max stroke | Up to 500 mm |
Specifications follow the official AirTAC MBL series datasheet. Confirm against the product label before installation. Standard stroke to 500 mm (special order to 800 mm). Thread options: PT / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 25 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: MBLC (adjustable cushion), MBLD (double rod), MBLJ (adjustable stroke), MSBL/MTBL (single acting).
Where the Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU Is Used
PCB Conveyor Diversion
Pushes lightweight printed circuit board trays across a 400 mm gap in electronics assembly lines, utilizing the 245 N push force to slide components without stalling.
Small Carton Sorting
Actuates a diverting arm in a compact packaging sorter, relying on the built-in magnet to confirm the full 400 mm extension before the belt restarts.
Textile Yarn Guiding
Shifts a yarn guide carriage across a wide weaving loom section, where the lightweight riveted aluminum body minimizes moving mass on the overhead carriage.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU the Right Cylinder?
Selecting the MBL25X400SU is ideal when a 400 mm travel is needed but workspace is severely restricted. If your application requires less force, stepping down to the 20 mm bore yields 157 N of push at 0.5 MPa. Conversely, if your payload is heavier, stepping up to the 32 mm bore provides 402 N of push at 0.5 MPa. For applications needing precise end-of-stroke deceleration at higher speeds, consider the MBLC variant which offers an adjustable air cushion instead of the standard fixed rubber bumper.
Because this model features a 400 mm stroke on a relatively small Ø10 mm rod, it has a low tolerance for side loads. Long unsupported strokes are prone to rod-bearing bending; therefore, an external guide rail, a CA pivot back cover, or the anti-rotation MBLD double-rod type should be used to prevent premature wear. Note that this plain cylinder does not hold its position or load when air pressure is lost—the rubber bumper only softens the end impact and acts as no brake. If static load holding is required, install an external rod lock or a pilot-operated check valve. Replacement matching requires a 25 mm bore, 400 mm stroke, G1/8 port size, PT thread, U flat-end back cover, and the -S magnet.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB / FA / SDB) and back cover (CA pivot / U flat-end).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBL Aluminum Alloy Mini Cylinder MBL25X400SU FAQ
At 0.5 MPa, this 25 mm bore cylinder provides 245 N of push force and 206 N of pull force. At 0.7 MPa, the push force increases to 343 N, with a maximum theoretical force of 50 kgf at 1.0 MPa. The operational speed range is 30-800 mm/s.
The base MBL uses a fixed rubber bumper to soften end-of-stroke impacts and cannot be adjusted; if you need adjustable air cushioning, you must use the MBLC variant. This SU model includes a built-in magnet, allowing you to mount CMSG (reed) or DMSG/EMSG (electronic) sensor switches directly onto the body for position detection.
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