Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø20mm bore and 75mm stroke, G1/8 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.
- BoreØ20 mm
- Stroke75 mm
- Port sizeG1/8
- Acting typeSingle acting, pull (spring extend)
- Rod threadM8×1.25
- CushionFixed rubber bumper
About the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU
The AirTAC MTBL20X75SU is a compact single-acting pull-type, spring-extend aluminum mini cylinder. Air retracts the Ø8 mm rod to perform useful work, while an internal spring extends it back out. It yields a usable pull force of 84.8 N at 0.5 MPa and 137.5 N at 0.7 MPa. The 75 mm stroke suits mechanisms needing a long draw-in distance. The built-in -S magnet allows CMSG, DMSG, or EMSG sensor switches to track rod position.
This SKU features the U flat-end back cover for rigid rear mounting. Unlike double-acting MBL units, the return spring opposes the air stroke, meaning usable pull force is lower. It operates at 0.2-1.0 MPa with a fixed rubber bumper absorbing end-of-stroke impacts. The riveted rolling-packed aluminum barrel and 20 um hard-chrome carbon-steel rod ensure reliable sealing and low friction in tight spaces.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 mm |
| Acting type | Single acting, pull (spring extend) |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Pull force (net of spring) |
|---|---|
| 0.5 MPa | 84.8 N |
| 0.7 MPa | 137.5 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 MTBL20X75SU
| MTBL | Single acting, pull (spring extend) aluminum-barrel mini cylinder. |
|---|---|
| 20 | Bore size in mm (20/25/32/40). |
| ×75 | 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 MTBL20X75SU Is Used
Textile Yarn Tensioning
Pulls a tensioning idler arm closed on a winding machine, delivering 84.8 N of pull force at 0.5 MPa to maintain consistent yarn tension during spooling.
Packaging Flap Sealing
Draws a mechanical linkage closed to fold carton flaps on a packaging line, utilizing the 75 mm stroke to accommodate various box sizes before spring-extending to a safe open rest.
PCB Test Fixture Clamping
Pulls a test probe head down onto a printed circuit board, using the -S magnet and a DMSG electronic sensor to verify the pull stroke position before initiating the electrical test.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X75SU the Right Cylinder?
To size this 20 mm bore correctly, stepping down is not an option as it is the smallest available MTBL bore. Stepping up to the 25 mm bore gives a higher 132.6 N pull at 0.5 MPa if your mechanism requires more tensioning power. Choose this MTBL pull-type over an MSBL push-type when a fail-safe extended home position is required upon air loss. Remember that the minimum working pressure is 0.2 MPa to overcome the spring. Do not apply extra external load during the spring-extend return stroke. For a direct replacement, match the 20 mm bore, 75 mm stroke, G1/8 port, PT thread, U flat-end cover, and -S magnet. At 75 mm stroke on this small 20 mm bore, side-load and rod bending risks increase; ensure rigid mounting and use a guide to manage deflection.
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 MTBL20X75SU FAQ
The MTBL20X75SU generates a usable pull force of 84.8 N at 0.5 MPa and 137.5 N at 0.7 MPa. Because it is single-acting with a return spring, it requires a minimum operating pressure of 0.2 MPa to function, with a maximum operating pressure of 1.0 MPa.
On air loss or a stopped valve, the internal spring drives the rod to its fail-safe extended home position. The -S code means a built-in magnet is fitted, allowing AirTAC CMSG reed switches and DMSG or EMSG electronic solid-state sensors to detect rod position.
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