Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X75SU
The AirTAC Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X75SU is a genuine single acting, pull (spring extend) aluminum-barrel mini round cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 MTBL40X75SU
The AirTAC MTBL40X75SU is a compact single-acting pull-type mini cylinder with a 40mm bore and 75mm stroke. Air retracts the 16mm hard-chrome carbon-steel rod to do useful work on the pull stroke, while an internal spring extends it back. It develops 339.1 N of usable pull force at 0.5 MPa (550.1 N at 0.7 MPa), making it well-suited for drawing mechanisms closed or tensioning heavy assemblies over a 75mm travel. The riveted aluminum barrel keeps the frame light for tight spaces.
This SKU includes a built-in magnet (-S) for fitting CMSG reed or DMSG and EMSG solid-state sensor switches to track rod position. It uses a U flat-end back cover for rigid rear mounting and a G1/4 port. A fixed rubber bumper absorbs end-of-stroke impact, as single-acting designs lack adjustable air cushions. The overall length is longer than a double-acting MBL, calculated as A + 2 x stroke, to house the return spring.
Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X75SU Technical Specifications
| Model | Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X75SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MTBL40X75SU
| MTBL | Single acting, pull (spring extend) aluminum-barrel mini cylinder. |
|---|---|
| 40 | 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 MTBL40X75SU Is Used
Injection Mold Ejection
Pulls a mold core plate back 75mm during ejection; the 339.1N pull force at 0.5MPa securely retracts the mechanism against mold resistance.
Stamping Press Draw
Draws a blank holder closed in a 40mm bore stamping die, using the 75mm stroke to tension the sheet metal before the hit.
PCB Test Fixture
Retracts a test probe head away from a circuit board; the fail-safe extended home ensures probes lift clear of the PCB on air loss.
Is the Airtac MTBL Single Acting Aluminum Alloy Mini Cylinder MTBL40X75SU the Right Cylinder?
Choose this 40mm bore when you need substantial pulling force in a compact body. If your load is lighter, step down to the 32mm bore, which yields 224.8 N at 0.5 MPa; if you need maximum pull, this 40mm is the largest single-acting MBL available, providing 339.1 N at 0.5 MPa. Remember that the return spring opposes the air stroke, so usable pull force is lower than a same-bore double-acting MBL.
Select the MTBL spring-extend type when your process requires a fail-safe EXTENDED home position on air loss, which is the opposite of the MSBL push type that fails retracted. Apply NO extra external load during the spring return stroke, and maintain a minimum operating pressure of 0.2 MPa to overcome the spring. This MTBL40X75SU configuration has a 75mm stroke, PT tapered thread, U flat-end back cover, and an -S magnet. For any stroke approaching the 100mm maximum on these small bores, be mindful of rod bending and use a guide to manage side loads.
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 MTBL40X75SU FAQ
The 40mm bore yields a usable pull force of 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.
It is single-acting, spring-extend: air retracts the rod, and the spring extends it to a fail-safe extended home on air loss. The -S magnet lets you mount CMSG reed or DMSG and EMSG electronic switches to detect rod position.
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