Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25CA
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25CA 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 MSBL40X25CA
The AirTAC MSBL40X25CA is a compact, single-acting push-type mini cylinder with a 40mm bore and 25mm stroke. Air extends the rod, while an internal spring retracts it to a fail-safe home on air loss. As the largest MSBL bore, it delivers a usable push force of 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa. The CA back cover equips a pivot clevis, allowing the body to swing on a pin to absorb arcing or angular motion during the push stroke.
This SKU lacks a built-in magnet, so it cannot host CMSG, DMSG, or EMSG position sensors. It features a G1/4 port, a 16mm carbon-steel rod with 20 µm hard-chrome plating, and a riveted rolling-packed aluminum barrel. A fixed rubber bumper softens end-of-stroke impact, as single-acting designs do not use adjustable air cushions. The return spring is small and only meant to retract the rod itself, so apply no external load during the return stroke.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25CA Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25CA |
|---|---|
| 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 MSBL40X25CA
| 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 MSBL40X25CA Is Used
Stamping Press Ejection
Ejects formed sheet metal parts from a stamping die. The 690.8 N force at 0.7 MPa breaks the vacuum, while the spring return guarantees the ejector clears the die if air pressure drops.
Pivoting Lid Clamp
Secures a hinged safety lid on a packaging machine. The CA pivot cover accommodates the lid's arcing motion, and the fail-safe home ensures the clamp releases safely on air loss.
Plastic Injection Mold Core
Pushes a side-core into a mold cavity against 439.6 N of resistance at 0.5 MPa. The fixed rubber bumper absorbs the mold-close impact without requiring complex adjustable cushioning.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X25CA the Right Cylinder?
At 40mm, this is the largest standard MSBL bore. If you need less force, step down to the 32mm bore, which provides 281.3 N at 0.5 MPa. If you require force in both directions or a powered retraction, the double-acting MBL or MBLC is a better choice than this single-acting push model. For applications needing air to pull and spring to extend, consider the MTBL pull type.
Remember the minimum operating pressure is 0.2 MPa because air must first overcome the return spring. The PT tapered thread is standard. To replace this unit, match the 40mm bore, 25mm stroke, G1/4 port, PT thread, CA pivot back cover, and confirm no magnet is required. With a 25mm stroke on a 40mm bore, side-load is minimal, but the CA clevis is ideal if the mechanism inherently pivots.
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 MSBL40X25CA FAQ
The usable push force, already net of the return spring, is 62.8 N at 0.2 MPa, 188.4 N at 0.3 MPa, 314.0 N at 0.4 MPa, 439.6 N at 0.5 MPa, 565.2 N at 0.6 MPa, and 690.8 N at 0.7 MPa. The maximum kgf equivalent is roughly 70.4 kgf at 0.7 MPa. Operating pressure must be 0.2-1.0 MPa, as 0.2 MPa is the minimum needed to overcome the spring.
No, this specific SKU lacks the -S code, meaning it has no built-in magnet. It cannot be used with AirTAC CMSG reed switches or DMSG/EMSG electronic sensors. If you need position detection, select an MSBL40X25S-CA variant with the magnet added.
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