Airtac MG Stainless Steel Mini Air Cylinder MG40X40S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X40S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MG40X40S
Built to the JIS mini-cylinder standard, the MG40X40S is a double acting round-body actuator with a 40 mm bore and a short 40 mm stroke. Its SUS304 stainless barrel and hard-chrome plated 16 mm rod shrug off washdown and damp shop air far better than painted-steel minis, and the riveted covers keep the body compact. At 0.5 MPa it delivers 628.3 N of push, enough for clamping and pressing jobs that smaller 25 mm and 32 mm bores cannot hold.
Because the S code is in the model, a magnet is already fitted, so CMSG, DMSG or EMSG switches can be mounted directly for end-of-stroke detection without ordering a special build. For sizing, treat roughly 377 N (about 0.6 of the 0.5 MPa push) as the practical working force, or think of it as lifting about 32 kg vertically with a 2:1 margin. The fixed anti-impact bumper pad softens the stroke ends; it decelerates only and is not an adjustable cushion.
Airtac MG Stainless Steel Mini Air Cylinder MG40X40S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X40S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MG40X40S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MG40X40S Is Used
Bench-top press fixture
The 628.3 N push at 0.5 MPa suits light staking and forming on small aluminium brackets where a 32 mm bore at 402.2 N would stall.
Pick-and-place with confirmation
The built-in magnet accepts CMSG or DMSG switches, so a packaging head can signal both extend and retract on a 40 mm transfer stroke.
Battery-powered AGM lifting latch
With about 32 kg of vertical lift capability at a 2:1 margin, the cylinder can release or seat a latch pin on warehouse cart lifts.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X40S the Right Cylinder?
Compare by 0.5 MPa push: the MG32X40S below it gives 402.2 N, while this 40 mm bore steps up to 628.3 N. If you need more force or a larger bore, the cushioned MGC family extends to 50 mm and 63 mm with adjustable air cushioning for faster cycles. Note that a plain MG drifts when air is lost or the valve centres, so add an external rod lock or pilot check valve if the load must stay put.
The magnet is built in, so sensor-ready positioning is covered out of the box. Mount it with LB foot, FA flange, CB clevis or SDB pivot brackets, and use I or Y rod knuckles on the M14x1.5 male thread. With only a 40 mm stroke, rod side-loading is minimal, but keep the tooling aligned to protect the 16 mm rod.
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 MG40X40S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N; at 0.7 MPa those rise to 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Operating pressure spans 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed runs 30-800 mm/s.
No. The fixed anti-impact pad only softens the impact at each end of the 40 mm stroke; it is not a brake or lock, and the rod will drift if supply pressure drops. For a held load, fit an external rod lock or a pilot check valve. The stainless JIS body, however, does accept LB, FA, CB and SDB mounting hardware interchangeably.
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