Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80U
The AirTAC Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80U 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 MSBL40X80U
The AirTAC MSBL40X80U is a compact single-acting push-type aluminum mini cylinder. Air extends the rod for the 80mm work stroke, while an internal spring retracts it, ensuring a fail-safe retracted home position on air loss. As the largest standard bore in this series, 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 opposing spring, making it highly effective for one-directional pressing and ejecting tasks.
This SKU features a U-type flat-end back cover for rigid rear mounting and a G1/4 port. It lacks the -S magnet option, so it cannot accept CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durability. A fixed rubber bumper absorbs end-of-stroke impact, and the heterogeneous two-way grease-retaining piston seal maintains lubrication. Note that minimum operating pressure is 0.2 MPa because the air must first overcome the return spring.
Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80U Technical Specifications
| Model | Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80U |
|---|---|
| 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 MSBL40X80U
| 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 MSBL40X80U Is Used
Sheet Metal Stamping Ejector
Ejects stamped brackets from a 50-ton press bed. The 439.6 N push force at 0.5 MPa reliably breaks the part free, while the spring-return fail-safe home guarantees the ejector clears the die on air loss.
Pallet Corner Flattener
Flattens protruding corner boards on outbound packaging pallets. The 80mm stroke provides clearance for pallet entry, and the U flat-end cover mounts rigidly to the conveyor frame to absorb the 690.8 N peak impact at 0.7 MPa.
Plastic Injection Mold Gate Breaker
Snaps the gate runner off freshly molded plastic housings. The fixed rubber bumper softens the snap impact at full extension, and the single-acting design requires only one 3/2 solenoid valve to cycle the 40mm bore.
Is the Airtac MSBL Aluminum Alloy Mini Cylinder MSBL40X80U the Right Cylinder?
When sizing this 40mm bore, step down to the 32mm bore if you need less force—it yields 281.3 N at 0.5 MPa. Since 40mm is the largest available MSBL bore, stepping up within this mini series is not an option; for higher force, consider a double-acting MBL or a larger ISO cylinder. The 0.2 MPa minimum operating pressure is mandatory to overcome the spring. Ensure no external load is applied during the spring return stroke, as the return force is small and only meant to retract the rod itself. For an 80mm stroke on a 40mm bore, side-load risks are moderate; use an external guide or a pivot bracket to prevent rod bending.
This MSBL40X80U configuration specifies a PT tapered thread, a U flat-end back cover, and no built-in magnet. If your application needs a position signal, you must select an -S variant. If arcing movements are required rather than rigid flat mounting, switch to a CA pivot back cover. For air-pull applications where the spring extends the rod, use the MTBL series instead.
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 MSBL40X80U FAQ
The usable push force is 439.6 N at 0.5 MPa and 690.8 N at 0.7 MPa (equivalent to roughly 70.4 kgf). The operating pressure range is 0.2-1.0 MPa. The 0.2 MPa minimum is required because the air pressure must first overcome the internal return spring before generating usable push force.
No. This specific MSBL40X80U SKU does not include the -S built-in magnet, so it cannot accept CMSG, DMSG, or EMSG sensor switches. If you need rod-position detection, you must select the MSBL40X80S variant. Additionally, the spring return provides a fail-safe retracted home on air loss, but it cannot hold a mid-stroke load without continuous air pressure.
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