Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 200mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke200 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU
Delivering a robust 628.3 N of push force at 0.5 MPa, the AirTAC MI40X200SU is a double-acting round-body mini cylinder built for demanding actuation. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, giving it a distinct lifespan advantage over painted alternatives in damp or washdown environments. Driven through a 1/4" port, it moves a 200 mm stroke and relies on fixed TPU bumper pads to decelerate the piston at both ends.
For real-world sizing, plan for a safe working load of roughly 377 N, which is about sixty percent of the 0.5 MPa push rating. Alternatively, you can expect it to lift a 32 kg part vertically when applying a sensible 2:1 safety margin. This unit includes a built-in piston magnet for position sensing and features a U-type back cover that orients the rear port at 90 degrees for tight machine layouts.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 MI25~40 Stainless Steel Mini Cylinder MI40X200SU Is Used
Pallet Divertor
Pushes heavy wood or metal pallets sideways off a high-speed main line using the full 628.3 N push force at 0.5 MPa without stalling.
Flap Folding Arm
Drives a 200 mm pivoting arm to fold large corrugated carton flaps, relying on the U-type 90-degree rear port to keep hoses clear of the mechanism.
Lab Washdown Gate
Actuates a drainage gate in a sterile rinsing station where the stainless-steel construction resists constant moisture and mild chemical spray.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X200SU the Right Cylinder?
When sizing this 40 mm bore, compare it directly against its neighbours: a 32 mm bore yields 402.2 N of push at 0.5 MPa, while the 40 mm bore provides 628.3 N, making the upgrade necessary if you are stalling on heavier jigs. Since this is the largest standard round-body mini cylinder in the series, exceeding this capacity requires moving to a different family entirely. The 200 mm stroke is well within the 500 mm maximum, but long strokes invite rod bending, so ensure your front mounting guides the load to prevent side-play.
Remember that a standard double-acting cylinder drifts when air pressure drops or the valve is centred, as the TPU bumpers only soften the end-of-stroke impact rather than locking the rod. To suspend a load safely during an outage, fit an external rod lock or a pilot-operated check valve. This SKU includes the -S magnet, allowing you to mount CMSG, DMSG or EMSG switches for precise end-position detection.
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 0.15 – 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 MI25~40 Stainless Steel Mini Cylinder MI40X200SU FAQ
This 40 mm bore cylinder features a 1/4" air port and an M12x1.25 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, the piston will drift if air is lost or the valve is centred. The fixed TPU bumper pads only decelerate the stroke end and do not act as a brake. To hold a vertical load securely, you must install an external rod lock or a pilot-operated check valve in the air line.
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1-Year Warranty
Covers non-human-caused product damage.
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