Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X15SR
The AirTAC Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X15SR is a genuine single acting, pull (spring return) round-body mini air cylinder with a Ø40mm bore and 15mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke15 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 MTI40X15SR
Delivering 466.8 N of pull force at 0.5 MPa, this AirTAC round-body mini cylinder is built for heavy-duty tensioning and retraction tasks. The MTI40X15SR is a single-acting, spring-return PULL type: compressed air retracts the rod via its 1/4" port, while an internal spring pushes it back out. Because the spring holds the rod extended at rest, the mechanism naturally fails safe on air loss, keeping gates or hold-downs engaged.
The stainless-steel barrel and piston rod resist mild corrosion and washdown environments. As a larger 40 mm bore, it falls outside the ISO 6432 mounting standard but offers robust performance with a 16 mm rod and M12x1.25 male thread. For sizing, its safe working load is roughly 280 N, and it can vertically pull or hold about 23.8 kg with a 2:1 safety margin. The -S suffix means a piston magnet is included for position sensing.
Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X15SR Technical Specifications
| Model | Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X15SR |
|---|---|
| Series | MTI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MTI40X15SR
| MTI | round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MTI40X15SR Is Used
Fail-Safe Hold-Down Clamp
Uses the spring-extend rest state to keep a part clamped during an air loss event, requiring 0.2 MPa only to pull the rod back and release the workpiece.
Normally-Closed Heavy Gate
Holds a 40 mm bore gate shut by default, using the 466.8 N pull force at 0.5 MPa to retract and open the gate only when the line is actively cycling.
Vertical Tensioning Rig
Lifts or tensions materials vertically up to 23.8 kg with a 2:1 safety margin, relying on the 16 mm rod and M12x1.25 thread for secure heavy-load pulling.
Is the Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X15SR the Right Cylinder?
When sizing by pull force, this 40 mm bore provides 466.8 N at 0.5 MPa. If less force is needed, the next size down (32 mm) yields 295.6 N; since 40 mm is the largest in the range, applications requiring more pull force need an external solution. You must supply at least 0.2 MPa of air pressure to overcome the internal spring and retract the rod.
This 15 mm stroke is well within the 80 mm standard limit for this bore. Mounting options include LB foot, FA flange, SDB pivot-block, and TC trunnion, alongside an R axial-in rear cover. The integrated magnet (-S) supports CMSG, DMSG, and EMSG sensors, while fixed TPU bumpers cushion the stroke ends without locking the load.
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 MTI40X15SR FAQ
It delivers 466.8 N of pull force at 0.5 MPa and 677.9 N at 0.7 MPa. The rod is normally extended at rest via an internal spring. A minimum of 0.2 MPa is required to overcome the spring and retract the rod.
Yes, the -S suffix indicates a built-in piston magnet, allowing you to mount CMSG, DMSG, or EMSG switches. It is strictly single-acting pull, so it cannot hold a mid-stroke load on air loss, and fixed TPU bumpers only soften the ends.
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