Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U
The AirTAC Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U is a genuine double-acting aluminum-barrel mini round cylinder with a Ø20mm bore and 40mm stroke, G1/8 air ports and a fixed rubber bumper. Its compact riveted body suits push, hold and clamp motion in tight machine spaces.
- BoreØ20 mm
- Stroke40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionRubber bumper (MBLC variant: adjustable air cushion)
About the Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U
The AirTAC MBL20X40U is a compact double-acting aluminum mini round cylinder engineered for tight machine spaces. With a 20mm bore and 40mm stroke, it delivers 157 N of push force and 132 N of pull force at 0.5 MPa. This genuine AirTAC component features a U flat-end back cover, providing a rigid fixed mounting point for straightforward linear actuation tasks.
Unlike tie-rod bodies, the MBL utilizes a riveted rolling-packed barrel where the covers are crimped to the tube, making it exceptionally light but not designed for field disassembly. It relies on a fixed rubber bumper to soften end-of-stroke impacts rather than an adjustable air cushion, and a heterogeneous two-way piston seal retains grease for long service life. Because this specific SKU lacks the -S suffix, it has no built-in magnet and cannot support CMSG, DMSG, or EMSG position sensing.
Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U Technical Specifications
| Model | Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBL20X40U
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MBL20X40U Is Used
PCB Depaneling Ejectors
Provides the exact 157 N push force at 0.5 MPa needed to eject freshly routed PCB panels from a routing machine fixture without damaging delicate surface mount components.
Micro-Clamp Actuation
Drives a small 40mm stroke clamping jaw in a benchtop CNC lathe station, utilizing its rigid U flat-end back cover to hold a small aluminum workpiece securely during facing operations.
Sorter Diverter Gate
Pivots a lightweight diverter arm on a small-parts packaging conveyor, using its compact riveted aluminum body to fit within the tight 20mm lateral clearance of the sorter frame.
Is the Airtac MBL Aluminum Alloy Mini Cylinder MBL20X40U the Right Cylinder?
For lower force needs in compact assemblies, the neighbouring MBL16 series offers smaller dimensions, while stepping up to the MBL25X40 provides 245 N of push force at 0.5 MPa for heavier resistance. If your cycle speed demands adjustable end-cushioning to absorb kinetic energy, select the MBLC variant instead of the base MBL. The cylinder operates on G1/8 porting with a default PT thread form, an M8x1.25 rod-end, and a U flat-end back cover. Since the MBL20X40U relies on compressed air to hold position, the rod will drift or drop if air pressure is lost or the valve is centered; use an external pilot-operated check valve if the load must be held safely in place without live pressure.
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 MBL20X40U FAQ
The MBL20X40U double-acting cylinder generates 157 N of push force and 132 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 220 N, with a maximum theoretical force of 32 kgf at 1.0 MPa. It operates at speeds ranging from 30 to 800 mm/s.
No, the base MBL20X40U uses a fixed rubber bumper to soften end-of-stroke impacts and cannot be adjusted like the MBLC air cushion variant. Additionally, because this SKU lacks the -S suffix for a built-in magnet, you cannot fit CMSG, DMSG, or EMSG electronic or reed position sensors to it.
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