Airtac MG Stainless Steel Mini Air Cylinder MG25X20S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG25X20S 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 MG25X20S
With a 25 mm bore and a short 20 mm stroke, the MG25X20S is a double acting JIS round-body mini cylinder that pushes 245.3 N and pulls 206.1 N at 0.5 MPa, rising to 343.4 N on the extend stroke at 0.7 MPa. AirTAC rolls the SUS304 stainless barrel, covers and block into one riveted body, and the 10 mm hard-chrome plated rod (20 um) shrugs off damp or lightly washed-down surroundings better than painted-steel minis.
Because the footprint follows the JIS mini-cylinder standard, the MG25X20S drops onto standard JIS brackets and I or Y rod knuckles, which makes spares and redesigns painless. The fitted magnet lets CMSG, DMSG or EMSG switches report position, and the fixed anti-impact bumper pad at each end softens the direction change. As a rule of thumb, plan on roughly 147 N (about 15 kg of vertical lift) of real work at 0.5 MPa rather than the full 245.3 N rating.
Airtac MG Stainless Steel Mini Air Cylinder MG25X20S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG25X20S |
|---|---|
| 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 MG25X20S
| 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 MG25X20S Is Used
Presence confirm on small assembly fixtures
The built-in magnet and a CMSG switch give a compact 20 mm confirm stroke on jig plates, while 245.3 N at 0.5 MPa is ample for locating small stamped parts.
Short-push ejection on packaging lines
A 20 mm throw nudges cartons or blisters off a conveyor lane; the SUS304 barrel tolerates frequent wipe-downs, and the bumper pad quiets each cycle at 30-800 mm/s.
Sample lift in compact lab automation
Halving the 25 kgf theoretical force gives a safe vertical lift of about 15 kg, enough to raise microplate stacks or sample trays within a tight 20 mm envelope.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG25X20S the Right Cylinder?
At 245.3 N push (0.5 MPa) this bore sits between the 20 mm MG (157 N) and the 32 mm MG (402.2 N); step down for lighter clamping, up if the 20 mm stroke must move a heavier fixture. The 20 mm stroke suits short-throw tasks such as part present or eject; if you need to hold position with air off, add an external rod lock or pilot check valve, since the bumper pads only soften the stroke end and never lock the load. The S code already includes the magnet, so CMSG / DMSG / EMSG switches work out of the box; pick LB foot, FA flange or CB clevis mounting and PT, G or NPT ports when ordering.
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 MG25X20S FAQ
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. The theoretical maximum is 50 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), speed 30-800 mm/s, and the port is 1/8".
Yes. The S in the model code means a magnet is built into the piston, so CMSG, DMSG or EMSG reed switches can be clipped onto the 25 mm stainless barrel to signal end-of-stroke. Without the S option the piston carries no magnet and no switch can detect it.
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