Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125SU
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 MBL40X125SU
The AirTAC MBL40X125SU is a compact double-acting aluminum mini round cylinder engineered for tight machine spaces. Operating at 0.5 MPa, it provides 628 N of push force and 528 N of pull force across its 125 mm stroke. The U flat-end back cover provides a rigid, fixed rear mounting surface, making it highly stable for straightforward linear thrust tasks.
Unlike tie-rod bodies that unbolt for maintenance, this unit features a riveted rolling-packed barrel where the covers are crimped to the tube, ensuring a permanently sealed, lightweight profile. The carbon-steel piston rod is treated with 20 um hard-chrome plating to resist wear and corrosion. This SKU includes a built-in magnet (-S), allowing you to attach CMSG, DMSG, or EMSG sensor switches for precise end-of-stroke position detection. End impacts are absorbed by a fixed rubber bumper rather than an adjustable cushion.
Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125SU Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MBL40X125SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MBL40X125SU Is Used
PCB Depaneling Router
Provides 628 N of smooth linear push at 0.5 MPa to separate routed circuit boards, using the 125 mm stroke to clear the cutting spindle during indexing.
Connector Insertion Press
Drives a 16 mm chrome-plated rod to seat pin headers into plastic housings, relying on the DMSG electronic sensor to confirm full insertion depth.
Carton Flap Folder
Uses the rigid U flat-end rear mount to securely fold minor carton flaps on a packaging line, absorbing the end-of-stroke impact via the fixed rubber bumper.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125SU the Right Cylinder?
This 40 mm bore generates 628 N of push force at 0.5 MPa. If your application requires less force, stepping down to the 32 mm bore yields 402 N; if you need more power, the 50 mm bore provides 981 N. The fixed rubber bumper handles standard impact speeds well, but if your moving mass is heavy and requires deceleration tuning at the 125 mm stroke end, upgrade to the MBLC variant for an adjustable air cushion. Keep in mind that a plain MBL does not hold its position if air pressure drops—the rod will drift unless you add an external rod lock or pilot-operated check valve.
For your replacement match, this cylinder features a 40 mm bore, 125 mm stroke, G1/4 port with PT thread form, a U flat-end back cover, and a built-in magnet (-S). Because the stroke is 125 mm, the 16 mm rod has a moderate unsupported length; ensure your mounting resists side load to prevent premature rod-bearing wear.
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 MBL40X125SU FAQ
At 0.5 MPa, this double-acting 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N, with a theoretical maximum of 128 kgf at 1.0 MPa. It operates at a speed of 30-800 mm/s.
No, the base MBL40X125SU uses a fixed rubber bumper to soften end-of-stroke impacts and cannot be adjusted. If your application involves a heavy moving mass that requires deceleration tuning, you should select the MBLC variant, which features an adjustable air cushion.
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