Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125-CA
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125-CA 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 MBL40X125-CA
The AirTAC MBL40X125-CA is a compact double-acting aluminum mini round cylinder engineered for tight machine spaces where a larger profile body will not fit. It delivers a robust 628 N push force and 528 N pull force at 0.5 MPa over a 125 mm stroke, making it well-suited for mid-range actuation. The riveted rolling-packed barrel permanently crimps the front and rear covers to the tube, yielding a lightweight footprint but creating a unit not designed to be disassembled or rebuilt like a traditional tie-rod cylinder.
This specific SKU features a CA pivot (clevis) back cover that swings on a pin to accommodate arcing or angular loads, rather than a rigid flat-end mount. Inside, a heterogeneous two-way piston seal retains grease for long service life, while the Ø16 mm carbon-steel piston rod is protected by 20 µm hard-chrome plating for wear and corrosion resistance. Note that because this configuration lacks the -S suffix for a built-in magnet, it cannot accept a CMSG, DMSG, or EMSG position sensor. The base MBL relies on a fixed rubber bumper to soften end-of-stroke impact, not an adjustable air cushion.
Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125-CA Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125-CA |
|---|---|
| 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 MBL40X125-CA
| 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 MBL40X125-CA Is Used
Pallet Transfer Diverter
Uses the 628 N push force at 0.5 MPa to push heavy pallets onto a secondary conveyor line, where the CA pivot clevis absorbs the angular misalignment as the load diverts.
CNC Lathe Bar Feeder
Actuates a pusher mechanism over the 125 mm stroke to index raw bar stock into a spinning lathe chuck, relying on the retained-grease two-way seal for continuous daily cycling.
Packaging Case Erector
Folds corrugated cardboard flaps during case erection, utilizing the compact riveted aluminum barrel to fit within the narrow frame of the packaging machinery.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL40X125-CA the Right Cylinder?
If you need to step down from this 40 mm bore, the 32 mm bore provides 402 N push at 0.5 MPa; if you need to step up, the 50 mm bore yields 981 N push at 0.5 MPa. For applications requiring faster or heavier moves with end-of-travel shock absorption, step up to the MBLC variant, which replaces the fixed rubber bumper with an adjustable air cushion. If the mechanism only requires air to extend or retract in a single direction, the MSBL (push) or MTBL (pull) single-acting models cover bores 20-40.
Because the 125 mm stroke is substantial for a mini cylinder, the small Ø16 mm rod has limited tolerance for side loads; an external guide is recommended to prevent rod-bearing bending. The CA pivot back cover on this unit helps manage angular loads, but remember that this cylinder does not hold its load or position when air pressure is lost or the valve is centred—the rod will drift or drop. To maintain position without live pressure, use an external rod lock or a pilot-operated check valve. This exact replacement matches: 40 mm bore, 125 mm stroke, G1/4 port, PT thread, CA back cover, no magnet, and no mounting accessory.
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 MBL40X125-CA FAQ
This 40 mm bore cylinder delivers a push force of 628 N and a pull force of 528 N at 0.5 MPa. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa. It operates at a speed range of 30-800 mm/s.
No, the base MBL uses a fixed rubber bumper to soften impact and does not have an adjustable air cushion (you would need the MBLC variant for that). Additionally, because this SKU lacks the -S suffix for a built-in magnet, you cannot mount a CMSG, DMSG, or EMSG sensor switch to detect rod position.
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