Airtac MG Stainless Steel Mini Air Cylinder MG40X30S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X30S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 30mm 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
- Stroke30 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 MG40X30S
With a 40 mm bore and a short 30 mm stroke, this MG delivers double acting power in a compact round body: about 628.3 N push and 527.8 N pull at 0.5 MPa, rising to 879.6 N push at 0.7 MPa. The barrel is SUS304 stainless steel and the 16 mm rod is hard-chrome plated, so the cylinder shrugs off washdown, humidity and outdoor exposure far better than painted-steel minis. Because it follows the JIS mini-cylinder standard, it drops onto standard JIS brackets and rod knuckles without redesign.
The riveted round body carries fixed anti-impact bumper pads at each stroke end; these soften the direction-change shock but do not cushion adjustably, and they never hold a load. A practical sizing check: at 0.5 MPa plan on roughly 377 N of real work (about 0.6 of the push rating), which is enough to lift about 32 kg vertically with a 2:1 margin. The built-in magnet means CMSG, DMSG or EMSG switches can be clipped straight on for end-of-stroke sensing.
Airtac MG Stainless Steel Mini Air Cylinder MG40X30S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X30S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MG40X30S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MG40X30S Is Used
Clamping fixture on a CNC milling pallet
The 628.3 N push at 0.5 MPa clamps aluminium workpieces in a machining fixture, and the short 30 mm stroke keeps the clamp arm out of the cutter path.
Push-off on a carton sealing line
At the end of a packaging conveyor, the cylinder nudges filled cartons into a lane; the stainless SUS304 barrel tolerates frequent wipe-downs.
Sensor-checked part present check
With the built-in magnet and a CMSG switch, an assembly station confirms the probe has fully extended before the press cycle is allowed to start.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X30S the Right Cylinder?
Compare force classes at 0.5 MPa push: the MG32X30S below it gives about 402 N, while stepping up means the cushioned MGC series, which reaches Dia 50 and Dia 63 bores with adjustable air cushioning. If your clamp or press needs a controlled deceleration rather than a simple bumper, pick the MGC instead. Note that this cylinder drifts when air is lost or the valve centres, so add an external rod lock or a pilot check valve for any held load.
Mount it LB foot, FA flange, CB clevis or SDB pivot, and fit I or Y rod knuckles on the 16 mm rod. The -S magnet is already fitted, so sensor-ready sensing needs no reordering. A 30 mm stroke keeps the body short, which suits tight clamping stations.
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 MG40X30S 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 is 0.15-1.0 MPa = 22-145 psi, proof pressure is 1.5 MPa = 215 psi, and speed range is 30-800 mm/s.
Yes. The S in the model code means a piston magnet is factory-fitted, so AirTAC CMSG, DMSG or EMSG reed switches clamp directly onto the SUS304 barrel for extend and retract signalling. A non-S MG bore 40 cannot take these sensors.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MG Stainless Steel Mini Air Cylinder MG40X30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.