Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X50SU
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X50SU is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MTBL40X50SU
The AirTAC MTBL40X50SU is a compact single-acting pull-type mini cylinder with a 40mm bore and 50mm stroke. Air retracts the M12x1.25 carbon-steel rod, developing a usable pull force of 339.1 N at 0.5 MPa, while an internal spring drives it back out. It features a built-in magnet (-S) for position sensing and a U flat-end back cover for rigid mounting.
This configuration uses a G1/4 port, the largest available in the MBL series. Unlike a double-acting cylinder, the spring opposes the air stroke, meaning the net pull force is lower than a standard MBL. The riveted rolling-packed aluminum barrel and 20um hard-chrome plating ensure durability, while the fixed rubber bumper absorbs end-of-stroke impact without adjustable cushioning.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X50SU Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X50SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MTBL40X50SU
| MTBL | Single acting, pull (spring extend) aluminum-barrel mini cylinder. |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×50 | 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 MTBL40X50SU Is Used
Injection Mold Ejection
Pulls an injection mold stripper plate closed against 339.1 N at 0.5 MPa, guaranteeing the mold safely opens to its extended home on air loss.
Packaging Carton Sealing
Draws a sealing arm downward to tension film across a packaging line, relying on the fail-safe extended position to clear the conveyor during jams.
PCB Test Fixture Clamping
Retracts a test probe head away from a PCB using the M12 rod, allowing the CMSG sensor to confirm the safe extended rest position before unloading.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X50SU the Right Cylinder?
When sizing this 40mm bore, step down to the 32mm bore if you need less force (it provides 224.8 N at 0.5 MPa) or step up to a double-acting MBL40 if you require powered extension in addition to retraction. The MTBL40X50SU requires a minimum of 0.2 MPa operating pressure to overcome the return spring, operating within a 0.2-1.0 MPa range at 50-800 mm/s.
Remember that the spring-extend return stroke must not bear any extra external load. For replacement matching, verify the 50mm stroke, G1/4 port, PT thread, U flat-end back cover, and the -S magnet. At 50mm stroke, side-load and rod bending risks are minimal, but ensure rigid front mounting to prevent binding.
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 MTBL40X50SU FAQ
This 40mm bore cylinder provides a usable pull force of 339.1 N at 0.5 MPa and 550.1 N at 0.7 MPa. It operates on 0.2-1.0 MPa air pressure, requiring a minimum of 0.2 MPa to overcome the internal return spring.
It is a single-acting pull cylinder, meaning air retracts the rod and the internal spring extends it. On air loss, the spring drives the rod to its fail-safe extended home. The -S built-in magnet allows AirTAC CMSG (reed), DMSG, or EMSG (electronic) sensors to detect this rod position.
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