Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80SU
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80SU is a genuine single acting, push (spring return) aluminum-barrel mini round cylinder with a Ø40mm bore and 80mm 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
- Stroke80 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 MSBL40X80SU
The AirTAC MSBL40X80SU is a compact single-acting push-type aluminum mini cylinder. Air extends the 16mm carbon-steel rod (M12x1.25 thread) for an 80mm stroke, while an internal spring retracts it. As the largest bore in the MSBL family, it delivers a usable push force of 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa. These figures are already net of the return spring, providing robust thrust for heavy ejection or clamping tasks in tight spaces.
The U suffix indicates a flat-end rigid back cover, while the S suffix adds a built-in magnet for CMSG (reed) and DMSG/EMSG (electronic) sensor switches to detect rod position. The riveted rolling-packed aluminum barrel uses a heterogeneous grease-retaining piston seal. It runs on filtered air at 0.2-1.0 MPa, needing a minimum 0.2 MPa to overcome the spring. End-of-stroke impact is absorbed by a fixed rubber bumper, not an adjustable air cushion.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80SU Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MSBL40X80SU
| MSBL | Single acting, push (spring return) aluminum-barrel mini cylinder. |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×80 | 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 MSBL40X80SU Is Used
Injection Mold Ejection
Provides 439.6 N of push force at 0.5 MPa to eject dense plastic parts from molds, with the spring ensuring the rod retracts safely out of the mold closing area.
Woodworking Press
Applies 690.8 N of thrust at 0.7 MPa to hold veneer sheets against a CNC router bed; the fail-safe retracted home prevents the rod from blocking material loading.
Packaging Flap Folding
Extends 80mm to fold heavy cardboard carton flaps on a packaging line, using the fixed rubber bumper to absorb the end-of-stroke impact without adjustable cushions.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80SU the Right Cylinder?
At 0.5 MPa, this 40mm bore yields 439.6 N of usable push force. If your load is lighter, step down to the 32mm bore (281.3 N at 0.5 MPa) to save space; the 40mm is the largest standard MSBL size, so for higher force you must switch to a double-acting MBL cylinder. Remember that the return spring opposes the air stroke, so usable push force is lower than a double-acting cylinder of the same bore.
This model is driven by a simple 3/2 solenoid valve via its G1/4 port, saving on fittings versus a 5/2 valve. It provides a fail-safe retracted home on air loss, but it does not hold a mid-stroke load without air pressure. Never apply external load during the spring return stroke—the small spring force is only meant to retract the rod itself. For your replacement match: 40mm bore, 80mm stroke, PT thread, U flat-end back cover, no external mounting bracket, and -S magnet fitted.
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 MSBL40X80SU FAQ
The usable push force is 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 minimum of 0.2 MPa is required because the air must first overcome the internal return spring before generating thrust.
The -S suffix means a built-in magnet is fitted, allowing AirTAC CMSG (reed) and DMSG/EMSG (electronic) sensor switches to detect rod position. As a single-acting push cylinder, air extends the rod, but if air is lost or the valve is stopped, the internal spring retracts the rod to a defined fail-safe retracted home position.
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