Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø40mm bore and 25mm stroke, G1/4 air ports and a fixed rubber bumper. Air drives the pull (work) stroke and the spring returns the rod — it rests extended on air loss.
- BoreØ40 mm
- Stroke25 mm
- Port sizeG1/4
- Acting typeSingle acting, pull (spring extend)
- Rod threadM12×1.25
- CushionFixed rubber bumper
About the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU
The AirTAC MTBL40X25SU is a single-acting pull-type, spring-extend mini cylinder. Air retracts the Ø16 mm rod to perform work on the pull stroke, while an internal spring extends it back out. It delivers a usable pull force of 339.1 N at 0.5 MPa, peaking at 550.1 N at 0.7 MPa. The 25 mm stroke is ideal for short, powerful tensioning or seating tasks in compact spaces.
This SKU includes a built-in magnet (-S) for CMSG, DMSG, or EMSG sensor switches, and features a U flat-end back cover for rigid rear mounting. Because it is the largest standard bore, it uses a G1/4 port. The riveted rolling-packed aluminum barrel and 20 µm hard-chrome plated carbon-steel rod ensure durability, while the fixed rubber bumper absorbs end-of-stroke impact without adjustable cushioning.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull (spring extend) |
| 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 100 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 Pull Force (Ø40mm)
| Pressure | Pull force (net of spring) |
|---|---|
| 0.5 MPa | 339.1 N |
| 0.7 MPa | 550.1 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 MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU
| MTBL | Single acting, pull (spring extend) 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: MSBL (single-acting push), MBL/MBLC (double acting), MBLD (double rod).
Where the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU Is Used
Injection Mold Ejection
Pulls a mold core back during the 25 mm cycle with 339.1 N at 0.5 MPa, ensuring the mechanism safely resets to its extended home if air pressure drops.
Packaging Flap Folding
Draws carton flaps closed with 550.1 N at 0.7 MPa, using the fail-safe extended position to prevent jamming inside the folder during an air loss event.
Press Brake Tooling
Tensions and holds a die alignment pin via the M12x1.25 rod end, relying on the fixed rubber bumper to absorb the shock of the 25 mm pull stroke.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU the Right Cylinder?
Choose this 40 mm bore when you need the maximum single-acting pull force available in the MTBL series. If 339.1 N at 0.5 MPa is excessive, step down to the 32 mm bore, which provides 224.8 N at 0.5 MPa. As 40 mm is the largest size, there is no larger single-acting option. A minimum operating pressure of 0.2 MPa is required to overcome the return spring. Remember that the spring drives the rod to its extended home on air loss, so apply no external load during the return stroke. For replacements, match the 40 mm bore, 25 mm stroke, PT thread, U flat-end cover, and -S magnet.
Quick checklist
- ✓ Usable pull force at your pressure (min 0.2 MPa)
- ✓ Fail-safe rest position (extended)
- ✓ 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 MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X25SU FAQ
This cylinder provides a usable pull force of 339.1 N at 0.5 MPa and 550.1 N at 0.7 MPa. The operating pressure range is 0.2-1.0 MPa, with a 0.2 MPa minimum required to overcome the internal return spring.
The -S code indicates a built-in magnet for position detection using AirTAC CMSG (reed) or DMSG/EMSG (electronic) sensor switches. The U code specifies a flat-end back cover for rigid, non-pivot rear mounting. The spring drives the rod to this extended home on air loss.
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