Airtac MG Stainless Steel Mini Air Cylinder MG25X20
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG25X20 is a genuine double acting JIS-standard round-body mini air cylinder with a Ø25mm bore and 20mm 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
- Stroke20 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 MG25X20
With a 25 mm bore and a short 20 mm stroke, this double acting MG delivers about 245.3 N of push at 0.5 MPa, stepping up to 343.4 N at 0.7 MPa. The round barrel is SUS304 stainless steel riveted onto the covers, and the 10 mm rod carries a 20 um hard-chrome plating, so the body shrugs off damp, washdown-prone spots where painted minis corrode. Because the MG follows the JIS mini-cylinder standard, it drops onto standard JIS brackets and rod knuckles when you need a spare or a redesign.
In practice, plan on roughly 147 N of usable work at 0.5 MPa, and expect the rod to lift about 12 kg vertically once you keep a 2:1 margin. The fixed anti-impact bumper pad at each end only softens the direction change - it is not an adjustable cushion and it will not hold a load if air is lost, so add an external rod lock or pilot check valve where holding matters. No magnet is fitted on this SKU, so CMSG, DMSG or EMSG switches cannot be mounted; order the S code if sensing is needed.
Airtac MG Stainless Steel Mini Air Cylinder MG25X20 Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG25X20 |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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 MG25X20
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×20 | 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 MG25X20 Is Used
Small parts ejection
A 20 mm kick on a machining or assembly line to nudge finished pins or bushings off a fixture, where 245 N at 0.5 MPa is ample and the short stroke keeps the cycle fast.
Carton flap tuck
Tucking or squaring a flap on a light carton at a packaging bench; the 20 mm stroke matches the flap travel and the stainless barrel tolerates wipe-down cleaning.
Gate on a test rig
A short-travel gate or clamp on an electronics test fixture; without the -S magnet no switch fits, so order MG25X20S if the controller must confirm gate position.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG25X20 the Right Cylinder?
At 0.5 MPa this bore pushes 245.3 N, well above the 157 N of the 20 mm MG and below the 402.2 N of the 32 mm MG, so pick MG25X20 when a compact 20 mm move sits between those two force classes. Mount it with LB foot, FA flange, CB clevis or SDB pivot hardware, and remember the plain cylinder drifts when the valve centres - it does not lock position. If your cycle needs end-of-stroke position feedback, specify the magnet version (S code) instead.
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 MG25X20 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 range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed runs 30-800 mm/s.
Not as supplied. MG25X20 has no built-in magnet, so CMSG, DMSG or EMSG switches cannot be detected on it. Order the magnet version (S code, e.g. MG25X20S) if you need switching, and note the fixed bumper pads only soften stroke-end impact - they never hold or brake a load.
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