Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 25mm stroke, G1/4 air ports and a fixed rubber bumper. Its compact riveted body suits push, hold and clamp motion in tight machine spaces.
- BoreØ40 mm
- Stroke25 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionRubber bumper (MBLC variant: adjustable air cushion)
About the Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU
The AirTAC MBL40X25SU is a double-acting aluminum mini round cylinder engineered for tight machine spaces where a larger profile body won't fit. It delivers a push force of 628 N and a pull force of 528 N at 0.5 MPa, making this 25 mm stroke variant well-suited for short, high-impact clamping or ejection tasks. The riveted rolling-packed barrel keeps the body light and compact, though it is not designed to be disassembled like a tie-rod cylinder.
This SKU includes the -S built-in magnet for position detection via CMSG, DMSG, or EMSG sensor switches, and features a U flat-end back cover for rigid mounting. The carbon-steel piston rod is plated with 20 um of hard chrome for wear resistance, while the heterogeneous two-way piston seal retains grease for a long service life. The base end relies on a fixed rubber bumper to soften end-of-stroke impact; for adjustable air cushioning, you would need the MBLC variant.
Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBL40X25SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MBL40X25SU Is Used
Injection Mold Ejection
Provides 628 N of push at 0.5 MPa to eject small plastic parts from tight mold cavities where the 25 mm stroke delivers rapid, short-cycle retraction.
Packaging Line Diverter
Handles small carton routing on a 40 mm bore footprint; the built-in -S magnet allows a DMSG sensor to confirm the diverter arm's position.
PCB Test Fixture
Applies 528 N of pull force to secure electronic modules during automated testing, utilizing the rigid U flat-end back cover for stable, zero-play mounting.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL40X25SU the Right Cylinder?
If you need to step down, the 32 mm bore neighbor offers 402 N push at 0.5 MPa, while stepping up to the 50 mm bore yields 981 N push for heavier loads. Because this is a 25 mm stroke, side-load stress on the 16 mm rod is minimal, but for longer unsupported moves an external guide or the MBLD double-rod type is recommended. Remember that a plain MBL does not hold its load when air pressure is lost or the valve is centered; the rubber bumper softens impact but is not a lock, so add an external rod lock or pilot-operated check valve if you need true position holding. Replacement match: 40 mm bore, 25 mm stroke, G1/4 port, PT thread, U flat-end back cover, built-in 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 MBL40X25SU FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N push and 528 N pull. At 0.7 MPa, the push force is 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
No, the base MBL uses a fixed rubber bumper to absorb end-of-stroke impact. If your application requires adjustable air cushioning for heavier or faster moving loads, you should select the MBLC variant instead.
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