Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25SCA
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25SCA is a genuine single acting, push (spring return) aluminum-barrel mini round cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 MSBL40X25SCA
The AirTAC MSBL40X25SCA is a compact single-acting push-type mini cylinder where air extends the rod and an internal spring retracts it. As the largest bore in the MSBL range, it delivers a usable push force of 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa. The 25 mm stroke is ideal for short, high-force ejection or clamping tasks. Because it is single-acting, it requires only one G1/4 air line and a simple 3/2 solenoid valve, reducing piping complexity compared to double-acting units.
This SKU includes a built-in magnet (-S) for CMSG reed or DMSG/EMSG electronic sensor switches, and a CA pivot back cover that swings on a pin to accommodate arcing angular loads. The riveted rolling-packed aluminum barrel and 20 um hard-chrome plated carbon-steel rod ensure durability. A fixed rubber bumper absorbs end-of-stroke impact, as no adjustable air cushion is present. On air loss, the spring drives the rod to a fail-safe retracted home position. Note that the return spring force is small and only meant to retract the rod itself; apply no external load during the return stroke.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25SCA Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25SCA |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MSBL40X25SCA
| MSBL | Single acting, push (spring return) aluminum-barrel mini cylinder. |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×25 | 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 MSBL40X25SCA Is Used
Stamping Press Ejector
Ejects stamped sheet metal parts from a 40-ton press die. The 439.6 N push force at 0.5 MPa reliably pushes heavy blanks, while the spring return ensures the rod safely retracts out of the die on air loss.
Woodworking Clamp
Applies holding pressure on solid timber during CNC routing. The CA pivot back cover accommodates slight workpiece angularity, and the fail-safe retracted home prevents clamp interference when the router loads new material.
Carton Flap Folder
Pushes corrugated carton flaps down during case sealing. The 25 mm stroke provides fast, short travel, and the -S magnet triggers a DMSG electronic sensor to confirm flap closure before the sealing head descends.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25SCA the Right Cylinder?
When sizing this cylinder, note that 0.2 MPa is the minimum operating pressure required to overcome the return spring. If you need less force, step down to the MSBL32 bore, which provides 281.3 N at 0.5 MPa. If you need force in both directions or higher push force, consider the double-acting MBL40. For applications needing the rod to be pulled by air and extended by the spring, use the MTBL series. This specific configuration features a G1/4 port with PT tapered threads, a 16 mm rod with an M12x1.25 end thread, the CA pivot back cover, and the -S magnet. For a 25 mm stroke on a 40 mm bore, side-load risk is minimal, but always use the CA pivot or an external guide if slight misalignment exists.
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 MSBL40X25SCA FAQ
The usable push force, already 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. The operating pressure range is 0.2-1.0 MPa; a 0.2 MPa minimum is required because the air must first overcome the internal return spring.
The CA back cover acts as a pivot clevis that swings on a pin, making it ideal for arcing or angular loads where a rigid flat-end mount would bind. The -S code indicates a built-in magnet, allowing you to mount AirTAC CMSG reed switches or DMSG/EMSG electronic sensors to detect the rod position.
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