Airtac MG Stainless Steel Mini Air Cylinder MG25X250S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG25X250S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø25mm bore and 250mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionFixed anti-impact bumper pads
About the Airtac MG Stainless Steel Mini Air Cylinder MG25X250S
With a 25 mm bore and a 250 mm stroke, this MG model is a double acting JIS round-body mini cylinder built around a SUS304 stainless barrel riveted to its covers, with a hard-chrome plated 10 mm rod threaded M10x1.25. The S in the code means a magnet is fitted, so CMSG, DMSG or EMSG switches can be clamped straight onto the barrel for end-position detection.
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa those rise to 343.4 N and 288.5 N, with a theoretical 50 kgf at 1.0 MPa. In practice, plan on roughly 147 N (about 15 kg) of real work at 0.5 MPa, which means it lifts around 12 kg vertically with a comfortable 2:1 margin. The fixed anti-impact bumper pads soften the direction change at each stroke end; they decelerate only and are not an adjustable air cushion.
Airtac MG Stainless Steel Mini Air Cylinder MG25X250S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG25X250S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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.
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 MG Stainless Steel Mini Air Cylinder MG25X250S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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.
Where the Airtac MG Stainless Steel Mini Air Cylinder MG25X250S Is Used
Presence check on packaging lines
The 250 mm stroke reaches into carton chutes to confirm a box is seated, while the built-in magnet and a CMSG switch signal extend and retract to the PLC without extra brackets.
Sample transfer in lab automation
About 15 kg of usable push at 0.5 MPa is ample for sliding sample trays between stations, and the stainless barrel tolerates the frequent wipe-downs of a clean bench.
Light press-fit of bushings
At 0.7 MPa the 343.4 N push seats small bushings or dowels in plastic housings; the bumper pad takes the sting out of the bottom-of-stroke contact.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG25X250S the Right Cylinder?
At 245.3 N push, bore 25 sits between the 20 mm MG (157 N at 0.5 MPa) and the 32 mm MG (402.2 N). Pick bore 20 if your load is light and space is tight; step to 32 or the cushioned MGC (which reaches 50 and 63 mm bores) if you need more force or adjustable end-of-stroke control. With a 250 mm stroke the 10 mm rod is more exposed to side loads, so guide the load externally or use a rod knuckle (I or Y) to avoid bending. Mount it on LB feet, an FA flange, a CB clevis or an SDB pivot bracket. Note that when air is removed the piston drifts freely - for a load that must stay put, add an external rod lock or a pilot check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting (LB / FA / CB / SDB) & knuckle
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 On first run, back off the cushion/impact settings and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MG Stainless Steel Mini Air Cylinder MG25X250S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N. At 0.7 MPa it pushes 343.4 N and pulls 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" on every MG bore.
Yes. The S in MG25X250S means the piston magnet is factory-fitted, so CMSG, DMSG or EMSG reed/electronic switches clamp directly onto the SUS304 barrel. A non-S MG cannot take these switches. Also note the fixed bumper pads only soften the stroke end - they do not hold position if air is lost.
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