Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA is a genuine single acting, push (spring return) aluminum-barrel mini round cylinder with a Ø40mm bore and 20mm stroke, G1/4 air ports and a fixed rubber bumper. Air drives the push (work) stroke and the spring returns the rod — it rests retracted on air loss.
- BoreØ40 mm
- Stroke20 mm
- Port sizeG1/4
- Acting typeSingle acting, push (spring return)
- Rod threadM12×1.25
- CushionFixed rubber bumper
About the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA
The AirTAC MSBL40X20CA is a 40mm bore, 20mm stroke single-acting push-type aluminum mini cylinder. Air extends the rod to perform work, while an internal spring retracts it to a fail-safe home when air is released. It delivers a usable push force of 439.6 N at 0.5 MPa (690.8 N at 0.7 MPa). The short 20mm stroke is ideal for high-cycle, short-throw jobs like ejecting parts or clamping.
This SKU features a CA pivot back cover, meaning the rear swings on a pin to accommodate arcing or angular loads without binding. It uses a G1/4 port and an M12x1.25 rod thread. The riveted aluminum barrel and 20 um hard-chrome carbon-steel rod provide durability. It has a fixed rubber bumper, not an adjustable air cushion. Because this model lacks the -S suffix, it cannot accept a CMSG, DMSG, or EMSG position sensor.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push (spring return) |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Fixed rubber bumper |
| Max standard stroke | Up to 150 mm |
Single-acting minimum working pressure is 0.2 MPa (the air must overcome the return spring). Do not apply an external load during the spring return stroke. Thread options: PT / G / NPT.
Usable Push Force (Ø40mm)
| Pressure | Push force (net of spring) |
|---|---|
| 0.5 MPa | 439.6 N |
| 0.7 MPa | 690.8 N |
These are the usable single-acting forces after the return spring — lower than a same-bore double-acting MBL. Size with a margin.
Model Code: Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA
| MSBL | Single acting, push (spring return) aluminum-barrel mini cylinder. |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×20 | Stroke length in mm. |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
| CA / U | Back cover: CA pivot (clevis) or U flat-end. |
Related: MTBL (single-acting pull), MBL/MBLC (double acting), MBLD (double rod).
Where the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA Is Used
Stamping Press Ejector
Ejects stamped metal sheets from a die. The 439.6 N push force at 0.5 MPa breaks the part free, while the spring return ensures the ejector retracts clear before the next feed cycle.
Pivoting Clamp Arm
Swings a hinged lever to clamp irregular castings. The CA pivot back cover accommodates the lever's arc during the 20mm stroke, preventing rod binding and premature seal wear.
Packaging Flap Folder
Folds cardboard flaps on a carton sealer. The fail-safe spring return guarantees the folder arm pulls back to a safe rest position on air loss, preventing carton jams.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA the Right Cylinder?
To size this cylinder, step down to the 32mm bore if your layout is tight, but note its push force drops to 281.3 N at 0.5 MPa. Step up is not possible as 40mm is the largest single-acting MSBL bore. The 0.2 MPa minimum operating pressure is required because air must first overcome the return spring before generating force. Do not apply external loads during the spring return stroke; the spring force is small and only meant to retract the rod itself.
The CA pivot cover suits applications where the cylinder must articulate. If you need force in both directions, use a double-acting MBL. If you need air to pull instead of push, choose the MTBL. This replacement matches: 40mm bore, 20mm stroke, G1/4 port, PT thread, CA pivot cover, no magnet. For a 20mm stroke on a 40mm bore, side-load risk is minimal, but ensure the CA pin is greased to prevent bracket wear.
Quick checklist
- ✓ Usable push force at your pressure (min 0.2 MPa)
- ✓ Fail-safe rest position (retracted)
- ✓ No external load on the spring return stroke
- ✓ 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 0.2 – 1.0 MPa (min 0.2 to overcome the spring).
- check Apply no external load on the spring return stroke.
- check Avoid side load on the piston rod.
- check Use the correct mounting accessory (LB / FA / SDB) and back cover (CA / U).
- check Installation by qualified personnel per AirTAC docs.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X20CA FAQ
The usable push force (net of the return spring) is 62.8 N at 0.2 MPa, 314.0 N at 0.4 MPa, 439.6 N at 0.5 MPa, and 690.8 N at 0.7 MPa. Operating pressure is 0.2-1.0 MPa; the 0.2 MPa minimum is required to overcome the internal spring. Maximum push force is roughly 70.5 kgf.
No. This specific MSBL40X20CA SKU lacks the -S suffix, meaning it has no built-in magnet and cannot accept AirTAC CMSG (reed), DMSG, or EMSG (electronic) sensor switches. If position detection is required, select the MSBL40X20SCA variant instead.
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