Airtac MG Stainless Steel Mini Air Cylinder MG20X25S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X25S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 25mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed anti-impact bumper pads
About the Airtac MG Stainless Steel Mini Air Cylinder MG20X25S
With a 20 mm bore and a short 25 mm stroke, this MG20X25S is a double acting JIS round-body mini cylinder built around a SUS304 stainless barrel riveted to its covers, with a hard-chrome plated 8 mm rod. At 0.5 MPa it pushes about 157 N and pulls about 131.9 N; at 0.7 MPa those figures rise to 219.8 N and 184.7 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The fixed anti-impact bumper pads at each stroke end soften the direction change, and the fitted magnet accepts CMSG, DMSG or EMSG switches.
For sizing, treat roughly 94 N (about 9.5 kg) as the practical push effort at 0.5 MPa, or halve the 16 kgf vertical equivalent to lift about 8 kg with margin. The stainless body shrugs off washdown and damp better than painted minis, and the JIS mounting footprint accepts standard mini-cylinder brackets and I or Y rod knuckles, so spares stay interchangeable.
Airtac MG Stainless Steel Mini Air Cylinder MG20X25S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X25S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MG20X25S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 MG20X25S Is Used
Sensor-checked slide clamp
The built-in magnet and 157 N push at 0.5 MPa suit a small fixture clamp on a machining jig where a CMSG switch confirms full clamp before the cycle starts.
Carton reject pusher
A 25 mm stroke is enough to nudge light cartons off a conveyor lane; the stainless barrel handles the damp, wiped-down environment of a packaging line.
Lab sample elevator
Halving the 16 kgf vertical equivalent gives about 8 kg of safe lift, enough to raise small sample trays in compact analytical or test equipment.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X25S the Right Cylinder?
At 157 N push (0.5 MPa) this bore 20 sits at the bottom of the MG range; step up to bore 25 (245 N) if the load needs more, since there is no smaller MG. The 25 mm stroke suits short clamp or eject moves; keep side loads off the 8 mm rod on any stroke. Air drives both directions, so the rod will drift if air is lost - add an external rod lock or pilot check valve where a position must be held. The S magnet is already fitted for CMSG / DMSG / EMSG switches; choose 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 MG20X25S FAQ
Push is 157 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa push is 219.8 N and pull 184.7 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is a double acting JIS mini cylinder, bore 20 mm, stroke 25 mm, rod 8 mm with M8x1.25 male thread, 1/8" ports, operating pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s, temperature -20 to +70 C, air filtered to 40 um.
Yes. The S in the model code means the piston magnet is already built in, so CMSG, DMSG or EMSG reed switches mount directly on the stainless barrel. A plain MG20X25 without the S cannot take these switches.
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