Airtac MG Stainless Steel Mini Air Cylinder MG40X225S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X225S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionFixed anti-impact bumper pads
About the Airtac MG Stainless Steel Mini Air Cylinder MG40X225S
With a 40 mm bore pushing 628.3 N at 0.5 MPa (879.6 N at 0.7 MPa), this MG40X225S is the strongest standard MG in the range, built as a double acting round-body mini cylinder to the JIS standard. The 225 mm stroke is well inside the 500 mm standard limit for this bore, and the riveted SUS304 stainless barrel with a hard-chrome plated 16 mm rod shrugs off damp, washdown and outdoor conditions that quickly ruin painted-steel minis. A fixed anti-impact bumper pad at each stroke end softens direction changes; it decelerates only and is not an adjustable air cushion.
Because the S code is fitted, a built-in magnet lets you mount CMSG, DMSG or EMSG switches for end-of-stroke signalling without any bracket work. The JIS mounting interface accepts standard mini-cylinder foot, flange and clevis hardware, so spare brackets and rod knuckles stay interchangeable across your stock. Practical sizing: at 0.5 MPa the push force equals roughly 64 kgf, so plan on about 38 kg of real work or lift about 32 kg vertically with a 2:1 margin. Note that when air is removed the piston drifts freely - for a held load add an external rod lock or a pilot check valve.
Airtac MG Stainless Steel Mini Air Cylinder MG40X225S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X225S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MG40X225S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MG40X225S Is Used
Pallet-stamp marking head
A 38 kg working force at 0.5 MPa drives a stamp or inkjet marker into cartons on a pallet line, with the 225 mm stroke clearing tall loads between cycles.
Benchtop press for bushings
About 64 kgf of push at 0.5 MPa presses small bushings and bearings in a maintenance-shop arbor press, and the stainless barrel survives cutting-fluid splash.
Gate position feedback on a washdown conveyor
The fitted magnet feeds CMSG switch signals to the PLC as a reject gate swings on a food-line conveyor, while the SUS304 body handles daily hose-downs.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X225S the Right Cylinder?
At 40 mm bore there is no larger standard MG, so if 628.3 N at 0.5 MPa is marginal for your job, step up to the cushioned MGC series, which also reaches 50 and 63 mm bores for high-speed or heavier-duty cycles. Going down, the 32 mm MG delivers 402.2 N at 0.5 MPa - choose it only if your load is under about 240 N of real work. This SKU ships with the magnet; a plain MG40X225 without the S cannot carry a sensor. Mount with LB foot, FA flange or CB clevis (SDB pivot pairs with CB), and fit I or Y rod knuckles on the M14x1.5 male thread. With 225 mm of travel, keep side loads off the rod and use a guide if the tooling overhangs.
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 MG40X225S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa = 22-145 psi with a 1.5 MPa = 215 psi proof pressure, speed range 30-800 mm/s, and the 1/8" port is the same on every MG bore.
No. The fixed anti-impact pads only soften the stroke-end impact; they are not a cushion, lock or brake, and the rod will drift if air pressure drops. For load holding, fit an external rod lock or a pilot check valve. The stainless JIS round body takes standard LB, FA, CB and SDB mounting hardware, and the -S magnet supports CMSG, DMSG and EMSG switches.
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