Airtac MI25~40 Stainless Steel Mini Cylinder MI40X160U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X160U is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 160mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke160 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 MI40X160U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles heavy-duty actuation where smaller bores stall. The Ø40 mm barrel and Ø16 mm piston rod are built from stainless steel to shrug off mild corrosion, making it highly suitable for damp washdown environments that degrade painted alternatives. It features a 1/4" port and a U-type back cover that orients the air supply 90 degrees for tight machinery layouts.
Because the fixed TPU bumper pads only decelerate the stroke end rather than acting as an adjustable cushion, you should plan for a safe working load of roughly 377 N. This translates to lifting about 32 kg vertically with a 2:1 safety margin, letting you match the actuator to real part weights without guessing. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG or EMSG sensors without switching to the -S variant.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X160U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X160U |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 160 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 MI40X160U
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 MI40X160U Is Used
Heavy Package Diverter
Pushes heavy cartons off a main logistics line using the 628.3 N push force, with the U-type cover keeping the 1/4" porting neatly out of the conveyor frame.
Woodworking Clamp
Secures dense timber stock during routing operations; the stainless construction survives dusty, high-humidity shop environments without corroding.
Pallet Gate Actuator
Drives a 160 mm stroke to open and close heavy safety gates around automated palletisers, lifting components safely under the 32 kg vertical threshold.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X160U the Right Cylinder?
When sizing this 40 mm bore, compare its 628.3 N push at 0.5 MPa against the next size down: the Ø32 bore generates 402.2 N, which may be insufficient for heavier jigs. Since Ø40 is the largest available MI series bore, moving beyond 879.6 N at 0.7 MPa requires a different cylinder family entirely. For the 160 mm stroke, ensure your mounting arrangement—whether LB foot, FA flange, SDB pivot or TC trunnion—prevents rod side-loading and bending.
A standard double-acting cylinder drifts when air is lost or the directional valve centres, as the TPU pads only soften impact at the stroke extremes and provide no braking. If your application demands strict position holding, integrate an external rod lock or a pilot-operated check valve into the pneumatic circuit.
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 MI40X160U FAQ
This 40 mm bore cylinder uses a 1/4" port. At 0.5 MPa it provides 628.3 N push and 527.8 N pull. At 0.7 MPa it provides 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet and therefore cannot accept CMSG, DMSG or EMSG switches. To use position sensing, you must select the -S magnet variant. It is also a non-ISO-6432 round-body mini cylinder with fixed TPU bumper pads rather than an adjustable air cushion.
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