Airtac MBL Aluminum Alloy Mini Cylinder MBL40X20U
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL40X20U is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 MBL40X20U
The AirTAC MBL40X20U is a compact double-acting aluminum mini round cylinder engineered for tight machine spaces. It delivers a push force of 628 N and a pull force of 528 N at 0.5 MPa, making this 20 mm stroke variant ideal for short, powerful linear movements. The U suffix designates a rigid flat-end rear cover for straightforward fixed mounting.
Unlike tie-rod bodies, this cylinder uses a riveted rolling-packed aluminum barrel where the covers are crimped to the tube, keeping weight low but preventing field disassembly. The carbon-steel piston rod features a 20 um hard-chrome plating to resist wear and corrosion, paired with a heterogeneous two-way piston seal that retains grease for a long service life. Because this specific SKU lacks the -S suffix, it cannot accept a CMSG, DMSG, or EMSG position sensor.
Airtac MBL Aluminum Alloy Mini Cylinder MBL40X20U Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL40X20U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MBL40X20U
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MBL40X20U Is Used
Short-Stroke Part Ejection
Uses the 628 N push force at 0.5 MPa to eject molded plastic parts from a tight fixture cavity where only 20 mm of travel is required.
Packaging Flap Folding
Folds corrugated carton flaps at high speed, relying on the 30-800 mm/s speed range and the fixed rubber bumper to absorb rapid end-of-stroke impacts.
PCB Test Socket Clamping
Secures printed circuit boards during automated electrical testing, utilizing the rigid U flat-end back cover for stable, perpendicular mounting.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL40X20U the Right Cylinder?
Selecting this 40 mm bore model makes sense when a 32 mm bore (402 N push @0.5 MPa) is too weak, but you want to avoid the larger footprint of a 50 mm bore (981 N push @0.5 MPa). With a short 20 mm stroke, side-load stress on the 16 mm rod is minimal, though external guides are always recommended if the load is offset. The U flat-end back cover provides a rigid rear mount, whereas a CA pivot cover would be needed for arcing or angular loads.
Keep in mind the base MBL relies on a fixed rubber bumper to soften end-of-stroke impacts rather than an adjustable air cushion (found on the MBLC variant). Additionally, a plain MBL does not hold its position if air pressure is lost or the valve is centred; the rod will drift. Use an external rod lock or pilot-operated check valve if the load must be held safely without live pressure. This SKU uses a standard PT tapered port thread and cannot be fitted with a sensor switch.
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 MBL40X20U FAQ
At 0.5 MPa, this 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. The maximum theoretical force is 128 kgf at 1.0 MPa. It operates on filtered air at 0.15-1.0 MPa, uses a G1/4 port, and runs at speeds from 30-800 mm/s.
No, this specific SKU lacks the -S magnet suffix, so it cannot accept CMSG, DMSG, or EMSG sensor switches. Additionally, the base MBL uses a fixed rubber bumper for end-of-stroke damping. If your application requires adjustable air cushioning, you should step up to the MBLC variant.
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