Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø40mm bore and 30mm 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
- Stroke30 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 MTBL40X30U
The AirTAC MTBL40X30U is a 40 mm bore, 30 mm stroke single-acting pull-type cylinder. Air retracts the rod to do the work, while an internal spring extends it back out. As the largest bore in this mini range, it generates a usable pull force of 339.1 N at 0.5 MPa and 550.1 N at 0.7 MPa, making it suited for heavy tensioning within compact spaces. The U suffix denotes a flat-end back cover for rigid rear mounting.
This configuration uses a G1/4 port and a Ø16 mm hard-chrome carbon-steel rod with an M12x1.25 thread. Because this SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed aluminum barrel relies on a fixed rubber bumper at stroke ends instead of an adjustable air cushion. Its overall length is A + 2 x stroke, and on air loss, the spring drives the rod to a fail-safe extended home position.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MTBL40X30U
| MTBL | Single acting, pull (spring extend) 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: MSBL (single-acting push), MBL/MBLC (double acting), MBLD (double rod).
Where the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U Is Used
Injection Mold Ejector Reset
Draws the mold ejection plate back 30 mm against 339.1 N of resistance at 0.5 MPa, ensuring the mechanism is pulled closed and fails safe in the open position during air loss.
Heavy Drawer Latching
Tensiones a heavy industrial sliding drawer mechanism shut using the 550.1 N pull force at 0.7 MPa, holding the load on the pull stroke before releasing it to spring out.
Press Brake Pin Extraction
Retracts a 16 mm alignment pin on a press brake via the M12x1.25 rod end, pulling the pin clear of the workpiece so the spring can extend it back to a safe rest.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X30U the Right Cylinder?
Select this 40 mm bore when your application requires substantial pulling force in a small footprint. If you need less force, step down to the 32 mm bore, which yields 224.8 N at 0.5 MPa; as the largest standard mini size, there is no larger bore to step up to. Compared to the MSBL push type, this MTBL fails safe in the extended direction. It requires a minimum of 0.2 MPa operating pressure to overcome the return spring, and you must apply no external load during the spring-extend return stroke.
For a drop-in replacement, match the 40 mm bore, 30 mm stroke, G1/4 port, and PT thread form. Ensure you need the U flat-end back cover rather than the CA pivot clevis, and confirm that no position sensor is required since this non-S SKU cannot mount one. With a 30 mm stroke on a 40 mm bore, side-load risks are low, but rod bending should still be managed by guiding the load.
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 MTBL40X30U FAQ
The usable pull force is 339.1 N at 0.5 MPa and 550.1 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring, with a maximum operating pressure of 1.0 MPa.
No, this specific SKU lacks the built-in magnet (-S code), so it cannot accept CMSG, DMSG, or EMSG sensor switches. Additionally, because it is single-acting spring-extend, the spring drives the rod to a fail-safe extended home position on air loss, rather than retracting it.
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