Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X30SU
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X30SU is a genuine single acting, push (spring return) aluminum-barrel mini round cylinder with a Ø40mm bore and 30mm 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
- Stroke30 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 MSBL40X30SU
The AirTAC MSBL40X30SU is a 40 mm bore, 30 mm stroke single-acting push cylinder with a built-in magnet. Air extends the rod to deliver 439.6 N of usable push force at 0.5 MPa, while an internal spring retracts it to a fail-safe home when air is removed. This short 30 mm stroke is ideal for high-force clamping or ejecting parts in tight machine cells. A defined rest state on air loss prevents drift, unlike double-acting units.
Because it requires only one air line, you can drive it with a simple 3/2 solenoid valve instead of a 5/2, cutting fittings and wiring. The -S suffix means a magnet is fitted for CMSG reed or DMSG/EMSG electronic sensors to detect rod position. The U flat-end back cover provides rigid rear mounting. It features a riveted aluminum barrel, a 20 um hard-chrome carbon-steel rod, and a fixed rubber bumper to soften end impact.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X30SU Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X30SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MSBL40X30SU
| MSBL | Single acting, push (spring return) aluminum-barrel mini cylinder. |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×30 | 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 MSBL40X30SU Is Used
Stamping Blank Ejection
Uses the 439.6 N push force at 0.5 MPa to eject heavy sheet metal blanks from a die, relying on the spring to retract clear before the next press cycle.
Injection Mold Clamping
Holds a mold half securely in place during plastic injection, where the 30 mm stroke and fail-safe spring return ensure the clamp opens if air pressure drops.
PCB Router Pressing
Applies controlled downward pressure on a PCB routing fixture, using the U flat-end back cover for stable rigid mounting and the -S magnet to confirm press contact.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X30SU the Right Cylinder?
This 40 mm bore provides the highest push force in the MSBL family, yielding 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa. If you need less force, step down to the 32 mm bore (281.3 N at 0.5 MPa). If you need force in both directions, use the double-acting MBL. Choose MTBL if you need air to pull and spring to extend. Note the 0.2 MPa minimum pressure required to overcome the spring. Never apply external load during the spring return stroke. Replacement match: 40 mm bore, 30 mm stroke, G1/4 port, PT thread, U flat-end back cover, with -S magnet.
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 MSBL40X30SU FAQ
The usable push force (net of the return spring) is 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa. Because air must overcome the internal spring, the minimum working pressure is 0.2 MPa. There is no pull force, as the spring handles retraction.
Air extends the rod, and when air is removed, the internal spring retracts it to a fail-safe home position. The -S suffix indicates a built-in magnet for position detection with AirTAC CMSG reed or DMSG/EMSG electronic sensors. Do not apply external load during the spring return stroke.
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