Airtac MG Stainless Steel Mini Air Cylinder MG40X400
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X400 is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke400 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 MG40X400
With its 40 mm bore pushing 628.3 N at 0.5 MPa (879.6 N at 0.7 MPa), the MG40X400 is the strongest standard bore in AirTAC's MG range: a double acting, JIS-standard round-body mini cylinder with a 400 mm stroke. The barrel is SUS304 stainless steel riveted onto the covers, paired with a 16 mm hard-chrome-plated rod (M14x1.5 male thread), so the body shrugs off washdown, humidity and outdoor exposure far better than painted-steel minis.
The 400 mm stroke is well inside the 500 mm standard limit for this bore, so no made-to-order build is needed. Because the rod is long, plan around side loads: at this reach even small lateral forces bend the rod, so guide the load externally where you can. A practical sizing rule: at 0.5 MPa the push force of 628.3 N converts to roughly 64 kg of theoretical lift, and halving that for a 2:1 margin means the cylinder comfortably lifts about 32 kg vertically. Note the fixed anti-impact bumper pads only soften the stroke ends - they are not a cushion and not a lock, so a held load needs an external rod lock or pilot check valve.
Airtac MG Stainless Steel Mini Air Cylinder MG40X400 Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X400 |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MG40X400
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | 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 MG40X400 Is Used
Pallet clamp actuation
The 628.3 N push at 0.5 MPa clamps palletised cartons or drums against a stop on transfer carts, with the 400 mm stroke clearing wide loads between cycles.
Lid lifting on mixing vessels
About 32 kg of vertical lift with a 2:1 margin raises stainless vessel lids or hatch covers in food and chemical plants, where the SUS304 barrel handles washdown.
Conveyor diverter pusher
A 400 mm reach pushes boxes across a belt lane in warehouse sorting; the fixed bumper pad softens each direction change at up to 800 mm/s travel.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X400 the Right Cylinder?
At 628.3 N push at 0.5 MPa, the 40 mm bore sits at the top of the MG ladder: the 32 mm bore below it offers 402.2 N, and for more force the next step is the cushioned MGC series, which adds 50 mm and 63 mm bores with adjustable air cushioning for faster or heavier duty. Choose this model when you need roughly 64 kg of theoretical push over a long 400 mm stroke in a compact round body.
This SKU has no S code, so no magnet is fitted and CMSG / DMSG / EMSG switches cannot be mounted - order an S variant if you need position sensing. Mount it with LB foot, FA flange or CB clevis brackets (SDB pivot used with CB), and fit I or Y rod knuckles on the M14x1.5 thread. With a 400 mm rod, keep the stroke axis aligned and avoid side loading to protect the chrome rod and seals.
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 MG40X400 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 1.5 MPa (215 psi), speed 30-800 mm/s, and the 1/8" port is the same on every MG bore.
No - this SKU has no built-in magnet, so CMSG / DMSG / EMSG switches cannot be mounted; order an S-coded model for sensing. The fixed anti-impact pad at each stroke end only decelerates the piston to soften impact; it is not an adjustable cushion (that is the MGC) and it never locks or holds a load when air is lost.
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