Airtac MG Stainless Steel Mini Air Cylinder MG25X400S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG25X400S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø25mm bore and 400mm 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
- Stroke400 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 MG25X400S
With a 25 mm bore and a long 400 mm stroke, this MG series cylinder delivers double acting power in a compact JIS round body: about 245.3 N push and 206.1 N pull at 0.5 MPa, rising to 343.4 N at 0.7 MPa. The riveted SUS304 stainless barrel with a hard-chrome plated 10 mm rod shrugs off damp, washdown-prone surroundings far better than painted-steel minis, and the 1/8" port keeps plumbing simple. Because it follows the JIS mini-cylinder standard, standard JIS brackets and rod knuckles bolt straight on.
The S in the code means a magnet is built into the piston, so CMSG, DMSG or EMSG reed switches can be clipped on for end-of-stroke signalling without any modification. At the stroke ends, fixed anti-impact bumper pads soften the direction change - they decelerate only and are not an adjustable air cushion. For planning: the 245.3 N push at 0.5 MPa equates to roughly 25 kgf theoretical lift, so budget for about 12 kg of vertical load with a 2:1 margin, and expect around 147 N of usable work force.
Airtac MG Stainless Steel Mini Air Cylinder MG25X400S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG25X400S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 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 MG25X400S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | 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 MG25X400S Is Used
Packaging line pusher
The 245.3 N push at 0.5 MPa cleanly kicks cartons or trays off a conveyor at 400 mm travel, while the bumper pad quiets the stroke end in continuous shift running.
Bottle-rail height set
Long 400 mm stroke raises or lowers guide rails on a bottling conveyor; the SUS304 barrel tolerates frequent washdown better than a painted mini body.
Gate position feedback
The built-in magnet drives CMSG or DMSG switches at both ends of a 400 mm safety or access gate, giving PLC confirmation without external proximity sensors.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG25X400S the Right Cylinder?
At 0.5 MPa this bore pushes 245.3 N. The smaller MG20 reaches only 157.0 N, so step up to the 25 if your fixture or part exceeds roughly 90-100 N of real load; the next size up, MG32, gives 402.2 N when you need more headroom. Note that a plain MG drifts when air is lost or the valve centres - for a held position add an external rod lock or a pilot check valve. The 400 mm stroke is within the 500 mm standard range for this bore, but long strokes amplify side load, so guide the load externally rather than cantilevering it on the 10 mm rod. Mount with LB foot, FA flange, CB clevis or SDB pivot; the fitted magnet means CMSG / DMSG / EMSG switches work out of the box.
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 MG25X400S 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, proof pressure 1.5 MPa = 215 psi, speed 30-800 mm/s, port 1/8", rod thread M10x1.25.
Yes - the S code means a piston magnet is factory-fitted, so AirTAC CMSG, DMSG or EMSG reed switches clamp directly onto the 25 mm barrel for end-of-stroke detection. The fixed bumper pads only soften the stroke-end impact; they do not hold or brake the load.
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