Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350SU is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 350mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ25 mm
- Stroke350 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- 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 MI25X350SU
Generating 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial work over its 350 mm stroke. The Ø25 mm bore uses a 1/8" port and an M10x1.25 male rod thread. Its riveted stainless barrel and rod resist mild corrosion, giving it a real edge over painted-steel alternatives in damp or washdown environments. The U-style rear cover provides a 90-degree port orientation for tight spatial constraints.
For practical sizing, plan for around 147 N of real work at 0.5 MPa, which translates to safely lifting about 12.5 kg vertically with a 2:1 margin. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position switches. Fixed TPU bumper pads decelerate the piston at the stroke ends, and the ISO 6432 mounting interface ensures it drops directly into standard mini-cylinder brackets and clevises.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MI25X350SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×350 | 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 MI25X350SU Is Used
Package Diverting Gate
Actuates a routing flap on a packaging line, using the 245.3 N push force to redirect heavy cartons smoothly at high cycling speeds.
Vertical Parts Lift
Raises lightweight jigs or workpieces through the 350 mm travel, safely lifting parts up to 12.5 kg in automated assembly cells.
Damp Storage Ejection
Pushes completed goods out of a humid washdown station, relying on the stainless-steel construction to prevent corrosion.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350SU the Right Cylinder?
When sizing this 350 mm stroke model, consider the neighbouring bores: stepping down to the Ø20 yields 157.0 N of push, while stepping up to the Ø32 provides 402.2 N at 0.5 MPa. This Ø25 strikes a solid balance for medium-force tasks. A plain cylinder drifts when air is lost or the valve is centred, as the TPU pads only decelerate the stroke end rather than locking the load; use an external rod lock or pilot check valve if you need to hold a vertical position.
The long 350 mm stroke demands careful alignment to prevent rod bending and premature seal wear from side loads. Along with the U back cover, you can mount this unit using LB foot brackets, FA flanges, SDB pivot blocks, or TC trunnions to suit your frame.
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 MI25X350SU FAQ
This double-acting cylinder has a 1/8" port and generates 245.3 N push and 206.1 N pull at 0.5 MPa. At 0.7 MPa, it provides 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
No, the base MI uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion (see the MIC variant for that). Additionally, it will drift if air is lost; you must add an external rod lock or pilot check valve to hold a load.
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1-Year Warranty
Covers non-human-caused product damage.
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