Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40R
The AirTAC Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40R 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 MTI40X40R
Delivering a robust 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. It operates as a single-acting PULL type: compressed air retracts the rod via its 1/4 inch port, while an internal spring pushes it back out. The stainless-steel barrel and rod resist mild corrosion and washdown environments. Because the spring holds the rod out at rest, the cylinder fails safe to the extended position if air pressure drops. Fixed TPU bumper pads soften the stroke ends without locking the load mid-travel.
For sizing a mechanism, you can estimate a safe working load of roughly 280 N, which is about 60 percent of the 0.5 MPa pull figure. Vertically, it pulls or holds around 23.8 kg with a 2:1 safety margin. Note that this specific SKU lacks the -S magnet option, so it cannot host CMSG, DMSG, or EMSG sensors. The R back cover provides an axial rear port orientation for straightforward inline plumbing.
Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40R Technical Specifications
| Model | Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40R |
|---|---|
| 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 MTI40X40R
| 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 MTI40X40R Is Used
Heavy-Duty Hold-Down
Keeps a 23.8 kg workpiece clamped during machining. The spring holds the part securely if air pressure is lost, releasing only when 0.2 MPa of air retracts the rod.
Normally-Closed Gate
Blocks a heavy product flow on a conveyor line. Air pulls the 16 mm rod back to open the gate, while the internal spring snaps it shut and keeps it extended at rest.
Tensioning Mechanism
Applies up to 280 N of safe working tension on a belt or web. The single-acting design saves air by using pneumatic power only to slacken the tension for adjustments.
Is the Airtac MTI Single Acting Stainless Steel Mini Cylinder MTI40X40R the Right Cylinder?
When sizing by pull force, this Ø40 bore provides 466.8 N at 0.5 MPa. If your application requires less pull, the next size down is the Ø32 bore, which yields 295.6 N at 0.5 MPa; since Ø40 is the largest available MTI bore, there is no larger standard option for higher loads. You must supply at least 0.2 MPa of air to overcome the internal spring and retract the rod. The 40 mm stroke sits well within the 80 mm standard travel limit for this bore. Because this non-magnetic SKU lacks the -S option, it cannot accept position sensors; choose an -S variant if you need CMSG, DMSG, or EMSG switches. Mounting options include LB foot, FA flange, SDB pivot-block, and TC trunnion brackets.
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 MTI40X40R FAQ
It delivers 466.8 N of pull force at 0.5 MPa and 677.9 N at 0.7 MPa. It requires at least 0.2 MPa to overcome the internal spring. The cylinder is a single-acting pull type, meaning the rod rests in the extended position and retracts only when air is applied.
No, this specific SKU does not include a magnet. You must select an -S variant to use CMSG, DMSG, or EMSG sensors. The stainless-steel construction resists mild corrosion, but fixed TPU bumpers only soften the stroke end and do not lock the load mid-travel.
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