Airtac MG Stainless Steel Mini Air Cylinder MG40X350S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X350S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 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 MG40X350S
With a 40 mm bore pushing 628.3 N at 0.5 MPa (879.6 N at 0.7 MPa), this MG40X350S is the strongest member of AirTAC's JIS round-body mini cylinder family, delivered here in double acting form with a 350 mm stroke and a built-in magnet. The barrel is SUS304 stainless steel riveted onto the covers - no tie-rods, no extruded profile - so the body shrugs off washdown and damp shop air better than painted-steel minis, while the hard-chrome plated 16 mm rod (M14x1.5 male thread) keeps wear low over long runs. Because the mounting footprint follows the JIS mini-cylinder standard, standard JIS brackets and I/Y rod knuckles bolt straight on.
The fixed anti-impact bumper pads at each stroke end simply decelerate the piston - they are not an adjustable air cushion, and they will not lock or hold a load if air pressure drops, so add an external check valve or rod lock where position must be kept. Practical sizing: treat roughly 377 N (about 38 kg of thrust) as your usable working force at 0.5 MPa, which lets this cylinder lift roughly 32 kg vertically with a 2:1 margin. The -S magnet means CMSG, DMSG or EMSG switches can be clipped on for end-of-stroke detection without any rework. Ports are 1/8" on every MG bore, pressure runs 0.15-1.0 MPa (22-145 psi) and speed from 30-800 mm/s.
Airtac MG Stainless Steel Mini Air Cylinder MG40X350S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X350S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 MG40X350S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MG40X350S Is Used
Pallet-stacker pusher arm
The 628.3 N push at 0.5 MPa slides loaded pallets or totes sideways on a transfer car, with the 350 mm stroke covering a full bay width and the stainless barrel coping with cold-store condensation.
Bottling line reject gate
A clevis-mounted MG40X350S kicks off-spec bottles or cartons off a food-line conveyor; the SUS304 body and hard-chrome rod survive frequent caustic washdown, and the magnet feeds a DMSG switch to confirm each kick.
Press-fit locating clamp
With about 38 kg of practical working thrust at 0.5 MPa, the cylinder clamps aluminium housings against a fixture on a small machining cell, the bumper pad softening every clamp stroke at 30-800 mm/s.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X350S the Right Cylinder?
At 40 mm bore you are at the top of the standard MG range: the next bore down, the 32 mm MG, delivers 402.2 N push at 0.5 MPa, so step up to this 40 mm model when your load needs more than about 400 N. If you need even more force or an adjustable cushion for fast, heavy cycles, the cushioned MGC extends the range to 50 and 63 mm bores. The 350 mm stroke sits comfortably inside the 500 mm standard limit, but a long thin 16 mm rod at full extension is vulnerable to side loads - guide the load externally or keep it aligned to avoid rod bending. This SKU already carries the magnet for sensor switches; pick LB foot, FA flange or CB clevis mounting (SDB pivot pairs with CB) to suit your machine frame.
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 MG40X350S 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, with a theoretical maximum of 128.1 kgf at 1.0 MPa. For real work, budget about 377 N (roughly 38 kg of thrust) at 0.5 MPa, which lifts about 32 kg vertically with a 2:1 safety margin. Ports are 1/8" and the rod thread is M14x1.5.
Yes - the S in the model code means a magnet is built into the piston, so CMSG, DMSG or EMSG reed/hall switches can be mounted directly on the barrel to signal end of stroke. The fixed anti-impact pads at each end only decelerate the piston to soften the stroke-end impact; they are not an adjustable air cushion and do not hold the rod in place if air is lost.
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