
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG25X150S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø25mm bore and 150mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
With a 25 mm bore and 150 mm stroke, this MG delivers 245.3 N of push and 206.1 N of pull at 0.5 MPa, rising to 343.4 N at 0.7 MPa. It is a double acting, JIS-standard round-body mini cylinder: air drives the rod out and back, and a fixed anti-impact bumper pad at each stroke end softens the direction change. The -S magnet built into the piston lets CMSG, DMSG or EMSG switches report position without any extra fitting work.
The barrel is SUS304 stainless steel riveted onto the covers, paired with a hard-chrome plated 10 mm rod, so the body shrugs off damp, washdown-prone and outdoor conditions that quickly ruin painted mini cylinders. Because the footprint follows the JIS mini-cylinder standard, standard brackets and I or Y rod knuckles bolt straight on. In practice, plan for roughly 147 N of real work at 0.5 MPa, which lifts about 15 kg vertically - or about 7 kg if you want a 2:1 margin for a gripper or lift fixture.
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG25X150S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 150 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 anti-impact bumper pads |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MG-series (JIS standard) datasheet. Barrel: SUS304 stainless steel (round-body, riveted construction); piston rod: carbon steel with 20µm hard-chrome plating. Thread options: PT (blank) / G / NPT.
| 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.
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB / CB / SDB | Mounting: FA flange, LB foot, CB clevis, SDB pivot bracket (with CB). |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, CB clevis, SDB pivot block, plus I and Y knuckles. Thread PT (blank) / G / NPT.
A 245.3 N push at 0.5 MPa folds cardboard flaps or presses cartons closed at 30-800 mm/s, and the stainless barrel copes with daily wipe-downs in the packing area.
The built-in magnet drives CMSG or DMSG switches, so a PLC confirms the 150 mm clamp stroke has fully closed before the next station cycles.
Lifting roughly 15 kg vertically at 0.5 MPa (about 7 kg with a 2:1 margin) suits short-lift pop-up and lowerator stations between belt sections.
At 245.3 N push (0.5 MPa) this bore sits between the MG20 (157 N) and the MG32 (402.2 N); if your load needs more than about 147 N of usable force, step up to the 32 mm bore, and if 157 N would do, the MG20 saves space and air. The 150 mm stroke is well inside the 500 mm standard range for this bore, so it is a catalogue item, not a made-to-order length. Remember that when air is removed or the valve is centred the rod drifts freely - the bumpers only soften the stroke ends - so add a pilot check valve or external rod lock if the load must stay put. Mount it on LB feet, an FA flange, a CB clevis or an SDB pivot bracket, and match the -S magnet to CMSG / DMSG / EMSG switches.
Quick checklist
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa those figures rise to 343.4 N and 288.5 N. The theoretical maximum is 50 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, and the port is 1/8" (PT thread, with G and NPT options).
Yes - the S code means the piston magnet is fitted, so CMSG, DMSG or EMSG reed/electronic switches clamp directly onto the SUS304 barrel. No, it will not hold a load: the fixed bumper pads only soften the stroke ends, and the rod drifts when air is lost, so use a pilot check valve or an external rod lock where holding matters.
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