Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU
The AirTAC Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU is a genuine single acting, pull (spring return) round-body mini air cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeSingle acting, pull (spring return)
- Rod threadM12×1.25
- CushionFixed TPU bumper pads
About the Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU
Delivering 466.8 N of net pull force at 0.5 MPa, this stainless-steel round-body mini cylinder uses compressed air to retract a Ø16 mm rod while an internal spring pushes it back out. Because it rests in the extended position, the rod stays forward during an air loss event to provide a fail-safe hold-down or blocking function. It requires at least 0.2 MPa of input pressure to overcome the return spring and initiate the pull stroke.
The rugged riveted construction shrugs off mild corrosion and washdown environments. It feeds air through a 1/4 inch port and mounts via a 90-degree U back cover. For sizing, this bore yields a safe working load of roughly 280 N, or about 23.8 kg of vertical lift with a 2:1 safety margin. Adding the -S magnet option enables CMSG, DMSG or EMSG position sensing.
Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU Technical Specifications
| Model | Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU |
|---|---|
| Series | MTI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 mm |
| Acting type | Single acting, pull (spring return) |
| Port size | 1/4" |
| 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 TPU bumper pads |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G. Note: the Ø40 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø40mm)
| Pressure | Pull force (spring return) |
|---|---|
| 0.5 MPa | 466.8 N |
| 0.7 MPa | 677.9 N |
Single-acting pull: the spring extends the rod; air retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU
| MTI | round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MI-family variants: MI / MIC (double acting ±cushion), MSI / MTI (single acting push / pull), MID / MICD (double rod ±cushion), MIJ / MICJ (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU Is Used
Fail-Safe Pallet Stop
Maintains a hardened physical stop extended inside a packaging lane to halt pallets, automatically retracting out of the way only when 0.2 MPa of air is applied.
Spring-Loaded Tensioner
Keeps a drive belt or web under 280 N of constant tension at rest, pulling back to release the material during machine threading or maintenance cycles.
Normally-Closed Blast Gate
Holds a heavy dust-collection damper securely shut by default, using the 677.9 N pull at 0.7 MPa to slide the gate open only during active ventilation cycles.
Is the Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU the Right Cylinder?
Size this actuator strictly by its retraction capability, as the spring only drives the extension stroke. The Ø40 bore generates 466.8 N of pull at 0.5 MPa, stepping up from the Ø32 bore which provides 295.6 N. If your application requires less force, dropping down a size saves space, but Ø40 is the largest available option in this series. Remember that the internal spring limits standard travel to 80 mm.
Select this unit when you need the rod to stay extended at rest and apply forward pressure without continuous air consumption. The fixed TPU bumpers soften the end-of-stroke impact but do not lock the load in a mid-stroke position. To mount position sensors, ensure you specify the -S magnet variant, as standard units cannot accept reed or electronic switches.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/R/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/R/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40SU FAQ
It provides 466.8 N of pull at 0.5 MPa and 677.9 N at 0.7 MPa. The rod rests extended and requires at least 0.2 MPa to overcome the internal spring and retract.
No, the spring drives the rod to the fully extended position on air loss; fixed TPU bumpers only soften the stroke ends. The -S magnet option is required for CMSG, DMSG or EMSG sensors.
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