The AirTAC Airtac MI Mini Cylinders MI25X40SCAG is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 40mm 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.
At roughly 245 N of push force at 0.5 MPa, the MI25X40SCAG is the mid-power 25 mm bore of the AirTAC MI range, specified here with G1/8 BSPP parallel ports that seal on a bonded face washer instead of on the thread itself. The short 40 mm stroke, double-acting piston and riveted stainless round body suit tight clamping and ejecting stations where a parallel-thread manifold is already plumbed and washdown resistance matters. In practice this bore moves real parts: plan on about 147 N of usable work at 0.5 MPa once you derate the 245 N rating, which is enough to lift roughly 12 kg vertically with a 2:1 margin. The rolled covers keep the body compact and light for a O25 cylinder, the CA pivot/clevis back cover comes fitted so no bracket swap is needed, and the -S in the code means the magnet is factory-installed for CMSG / DMSG / EMSG switch feedback.
| Model | Airtac MI Mini Cylinders MI25X40SCAG |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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. |
| ×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.
Mounted through its CA clevis cover, the cylinder ejects filled cartons of up to about 12 kg from a conveyor lane at 0.5 MPa, with the magnet confirming retraction between cycles.
The 245 N push force at 0.5 MPa holds aluminium housings against a hard stop in milling jigs, and the G1/8 ports drop straight onto a BSPP manifold block.
At 30-800 mm/s the short 40 mm stroke flips a reject gate on a bottling conveyor, and the stainless barrel and rod shrug off constant rinse-down splashes.
Size against the neighbours: the MI20 bore delivers about 157 N at 0.5 MPa and the MI32 reaches 402 N, so this 25 mm bore at 245 N covers the middle band for jigs, small slides and grippers. Thread matching is the deciding factor on this SKU - the G1/8 BSPP parallel port pairs with existing BSPP fittings and bonded-washer manifolds common on EU and Asian OEM lines; if your machine is plumbed in NPT or PT, order the T-suffix or base-thread version instead. Air drives the rod both ways, but the piston will drift when pressure drops or the valve centres, so fit an external rod lock or pilot check valve where a part must stay put. LB foot, FA flange, SDB pivot block and TC trunnion hardware all bolt to the ISO 6432 interface of this O25 body, and the fitted magnet is ready for position sensing.
Quick checklist
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa the push force rises to 343.4 N. The theoretical maximum output of the 25 mm bore is 50 kgf at 1.0 MPa. Operating pressure spans 0.15-1.0 MPa and rod speed 30-800 mm/s.
The G1/8 port is a parallel thread that seals on a bonded washer rather than on the thread flanks, which matches EU and Asian OEM manifolds and is a made-to-order variant versus the standard PT version. The riveted stainless round barrel and rod resist mild corrosion in damp or washed-down areas, and the body follows the ISO 6432 mounting interface for O8-O25, so standard mini-cylinder brackets and clevises fit without rework.
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