Airtac MG Stainless Steel Mini Air Cylinder MG40X500S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X500S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 500mm 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
- Stroke500 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 MG40X500S
With a 40 mm bore pushing 628.3 N at 0.5 MPa (879.6 N at 0.7 MPa), the MG40X500S is the strongest standard-stroke MG in double acting form, delivered with a built-in magnet for position sensing. The 500 mm stroke sits right at the top of the MG bore-40 standard range, so no made-to-order surcharge or lead time applies. Its riveted round body pairs a SUS304 stainless barrel with a hard-chrome plated rod, an all-metal build that shrugs off washdown and damp plant air far better than painted minis.
Because the MG follows the JIS mini-cylinder standard, this 40 mm bore drops onto standard JIS brackets and rod knuckles, which matters when you are standardising spares across a line. In practice, plan on roughly 377 N of usable push at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 margin - enough for a loaded 25 litre container or a small palletised fixture. The fixed anti-impact pad at each stroke end softens the 500 mm travel's stop, and the magnet already fitted accepts CMSG, DMSG or EMSG switches without modification.
Airtac MG Stainless Steel Mini Air Cylinder MG40X500S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X500S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 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 MG40X500S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 MG40X500S Is Used
Pallet-stacker pusher arm
On a walkie-stacker attachment, the 628.3 N push at 0.5 MPa nudges a 300 kg pallet skid onto a staging lane, with the 500 mm stroke clearing a full pallet width and the magnet confirming home position via a CMSG switch.
Bottling-line reject pusher
A beverage plant uses the 500 mm stroke to sweep off-spec 1.5 litre bottles sideways off a conveyor; the stainless SUS304 barrel survives constant splash-zone washdown that corrodes painted minis within months.
Vertical lift for drum lids
A chemical drum-decanting station lifts about 32 kg drum lids vertically (628.3 N halved for a 2:1 margin), the fixed bumper pads damping the 500 mm drop-end, with a pilot check valve added to hold the lid if air drops.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X500S the Right Cylinder?
At 628.3 N push and 527.8 N pull at 0.5 MPa, this is the ceiling of the MG range - the 32 mm bore below it manages only 402.2 N, so step up to this 40 mm bore whenever your load exceeds roughly 240 N of real work. If you need more force or higher speeds with heavier loads, the cushioned MGC series extends to 50 mm and 63 mm bores. Note that a plain MG drifts when air is lost or the valve centres - the bumpers only soften the stroke ends - so add an external rod lock or pilot check valve for held loads. The -S magnet is already fitted here, so CMSG / DMSG / EMSG switches mount directly. With 500 mm of travel, keep side loads off the 16 mm rod and guide the load externally; mount via FA flange or LB foot for long-stroke rigidity, or CB clevis with SDB pivot where the body must swing.
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 MG40X500S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa that rises 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) with 1.5 MPa (215 psi) proof pressure, speed 30-800 mm/s, and the 1/8" port is common to every MG bore.
The S in MG40X500S means the piston carries a built-in magnet, so CMSG, DMSG or EMSG reed/electronic switches clip onto the stainless barrel to signal rod position anywhere along the 500 mm stroke. Without the S option the piston is not magnetic and no switch can detect it - you would need to order an -S variant instead.
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