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.
The SCAG suffix on this MI25X40SCAG spells out the whole build: a 25 mm bore round-body mini cylinder in riveted stainless steel, fitted with the -S piston magnet, a CA pivot back cover and G (BSPP) port threads. It is double acting - air drives the rod both out and back through a 1/8" port (PT by default, G optional) - with a 10 mm rod on an M10x1.25 male thread. At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; size the actual work at roughly 147 N so the cylinder is never run flat against its rating.
Because the bore is 25, the ISO 6432 mounting interface applies, so standard mini-cylinder brackets and clevises drop straight on. For lifting, halving the ~25 kgf of thrust available at 0.5 MPa leaves about 12.5 kg of comfortable vertical capacity per cylinder. Fixed TPU bumper pads soften each stroke end, but they only decelerate - they never hold position: with air lost or the valve centred the rod drifts, so fit an external rod lock or pilot check valve wherever the load must stay put.
| 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.
A 40 mm stroke is exactly what staking terminal crimps on small connector housings needs; 245.3 N at 0.5 MPa - up to 343.4 N at 0.7 MPa - does the forming without a full-size press.
Mounted through its CA clevis cover, the cylinder kicks one carton per cycle off a takeaway conveyor, delivering 245.3 N forward and reversing at up to 800 mm/s between boxes.
The built-in -S magnet lets a CMSG or DMSG switch confirm extend and retract on a labelling-head stroke, so a missed label is flagged on the spot instead of at final QC.
Comparing neighbours: the bore below (20, 219.8 N push at 0.5 MPa) covers lighter duties, while the bore above (32, 563.0 N push) doubles this force class - 25 at 245.3 N sits in the middle, ideal for clamping and light pressing. The 40 mm stroke sits well inside this bore's 500 mm standard range, so no made-to-order length is needed, and short strokes keep side-load on the 10 rod minimal. Should your sequence need to stop and stay under load, the MI drifts when air is removed - add an external rod lock or a pilot-operated check valve. The CA pivot/clevis back cover pairs with SDB pivot blocks or TC trunnions; choose LB foot or FA flange mounts for fixed frames. This SKU already carries the -S magnet for CMSG, DMSG and EMSG switches.
Quick checklist
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa, 343.4 N push and 288.5 N pull; theoretical maximum force is 50 kgf at 1.0 MPa. The operating range is 0.15-1.0 MPa with a 1.5 MPa proof pressure, and speed runs 30-800 mm/s.
25 belongs to the ISO 6432 mounting family, so standard mini-cylinder brackets and clevises fit without rework; the CA pivot back cover takes SDB or TC pivots, and the -S magnet drives CMSG, DMSG or EMSG switches. The stainless barrel and rod tolerate washdown, ports are 1/8" (G BSPP optional), and the M10x1.25 male rod thread accepts standard rod-end accessories.
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