
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X100SCMLB is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 100mm 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.
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles robust linear motion tasks. The riveted barrel and Ø10 mm rod shrug off mild corrosion, making it highly suitable for damp or washdown environments where painted steel fails. Because it follows the ISO 6432 mounting interface, it drops directly into standard mini-cylinder brackets and clevises without redesign. The built-in magnet (-S) supports CMSG, DMSG and EMSG position switches.
For practical sizing, plan for roughly 147 N of actual work at 0.5 MPa, which translates to lifting about 12.5 kg vertically with a safe 2:1 margin. The 1/8" port feeds air to extend and retract the rod at 30-800 mm/s, while fixed TPU bumper pads absorb the impact at stroke ends. The CM round back cover and included LB foot bracket provide a stable base mount for this 100 mm stroke unit.
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X100SCMLB |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 100 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.
| 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.
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×100 | 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.
Actuates a routing flap on a packaging line, using the 245.3 N push force to redirect heavy cartons reliably at 0.5 MPa.
Pushes dunnage or loose components off an assembly pallet, leveraging the 100 mm stroke and LB foot mount for stable horizontal ejection.
Raises test tube racks vertically in a humid laboratory environment, where the stainless rod resists mild corrosion and the -S magnet tracks position.
When sizing this 25 mm bore, compare it against its neighbours: a 20 mm bore yields 157.0 N push at 0.5 MPa, while stepping up to a 32 mm bore provides 402.2 N. This model sits squarely in the middle for medium-force tasks. The included LB foot mount secures the body firmly, and the CM round rear cover offers specific port and pivot clearances.
Remember that a plain double-acting cylinder drifts if air pressure drops or the valve is centred; the TPU bumpers only soften the stroke end and will not act as a brake. If your machine requires strict position holding, add an external rod lock or a pilot-operated check valve. For high-cycle automation needing end-deceleration tuning, consider the MIC variable air cushion variant instead of these fixed pads.
Quick checklist
This 25 mm bore cylinder uses a 1/8" air port and an M10x1.25 male rod thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
No, the piston will drift if air pressure is lost or the valve is centred. The fixed TPU bumper pads only decelerate the stroke end and do not function as a lock. To maintain vertical position, you must install an external rod lock or a pilot-operated check valve.
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