Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 MTBL20X30SU
The AirTAC MTBL20X30SU is a compact, single-acting pull-type mini cylinder with a 20mm bore and 30mm stroke. Air retracts the M8 hard-chrome carbon-steel rod to deliver a usable pull force of 84.8 N at 0.5 MPa, while an internal spring drives the rod back out. The U flat-end back cover provides a rigid rear mounting face. A built-in magnet (-S) supports position detection.
This cylinder features a riveted rolling-packed aluminum barrel for tight spaces and a fixed rubber bumper instead of an adjustable air cushion. Its fail-safe design ensures the rod extends to a defined home position upon air loss, making it ideal for mechanisms that must safely disengage or open when a 3/2 valve is de-energized. The overall length scales as A + 2 x stroke.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 MTBL20X30SU
| MTBL | Single acting, pull (spring extend) aluminum-barrel mini cylinder. |
|---|---|
| 20 | 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 MTBL20X30SU Is Used
Print Head Tensioning
Pulls a textile print head carriage closed against a spring mechanism with 84.8 N at 0.5 MPa, releasing to a safe extended rest position when air is removed.
PCB Drawer Latch
Draws an electronics test fixture latch closed on the 30mm stroke, using the -S magnet to trigger a DMSG electronic sensor for cycle confirmation.
Light Gate Seating
Tensions a light packaging machine flap by pulling it down into a sealed slot, relying on the fail-safe extended home to open the gate on air loss.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU the Right Cylinder?
For a 20mm bore, this MTBL20X30SU yields 84.8 N of pull force at 0.5 MPa and 137.5 N at 0.7 MPa. If your tensioning load is lighter, dropping down is not an option as 20mm is the smallest available MTBL size. If you need more pull power, stepping up to the 25mm bore gives 132.6 N at 0.5 MPa. A minimum of 0.2 MPa operating pressure is required to overcome the return spring. Do not apply external loads to the rod during the unpowered spring-extend return stroke.
Choose this MTBL pull type over the MSBL push type when your mechanism requires a fail-safe extended home position rather than a retracted one. Unlike a double-acting MBL, net force is lower because the spring opposes the air stroke. This SKU includes the -S magnet for CMSG reed or DMSG/EMSG electronic sensors, uses a PT port thread, and features the U flat-end cover. The 30mm stroke is well within the 100mm standard maximum.
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 MTBL20X30SU FAQ
The 20mm bore yields a usable pull force of 5.7 N at 0.2 MPa, 84.8 N at 0.5 MPa, and 137.5 N at 0.7 MPa. A minimum operating pressure of 0.2 MPa is required to overcome the internal return spring.
As a single-acting pull type, air retracts the rod and the internal spring extends it. On air loss or valve de-energization, the spring pushes the rod out to a fail-safe extended home position. This SKU includes the -S magnet for CMSG/DMSG/EMSG sensors and a fixed rubber bumper.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Mini Cylinders
Request a Quote for Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL20X30SU
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.