Airtac MG Stainless Steel Mini Air Cylinder MG40X250
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG40X250 is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MG40X250
With a 40 mm bore and a 250 mm stroke, this MG delivers 628.3 N of push and 527.8 N of pull at 0.5 MPa, rising to 879.6 N at 0.7 MPa - the strongest bore in the MG range while staying double acting and compact. It is a JIS-standard round-body mini cylinder built on a SUS304 stainless barrel riveted to the covers, with a hard-chrome plated 16 mm rod that shrugs off washdown and damp shop air better than painted-steel minis.
Because the barrel is stainless and the body is rolled rather than tied, the footprint stays slim and light for its force class. A fixed anti-impact bumper pad at each stroke end softens the direction change - it decelerates the piston, it is not an adjustable air cushion. Running on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s, it lifts roughly 32 kg vertically at 0.5 MPa, or about 19 kg with a 2:1 margin, so you can match it to real part weights before you buy.
Airtac MG Stainless Steel Mini Air Cylinder MG40X250 Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG40X250 |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MG40X250
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MG40X250 Is Used
Pallet clamp actuation
Pushes a clamping beam on a warehouse palletiser with 628.3 N at 0.5 MPa; the 250 mm stroke clears a stacked load and the stainless barrel tolerates cold-store humidity.
Bottle-line pusher
Kicks off-spec cartons sideways on a bottling conveyor; the hard-chrome rod survives frequent washdown where painted minis corrode.
Fixture ejector press
Ejects machined housings from a drilling fixture with about 879.6 N at 0.7 MPa, the bumper pad damping the end-of-stroke shock cycle after cycle.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG40X250 the Right Cylinder?
At 628.3 N push (0.5 MPa) this bore sits above the MG32 (402.2 N) and below the cushioned MGC range, which extends to 50 and 63 mm bores when you need more force or an adjustable cushion. Plan on roughly 377 N of usable work at 0.5 MPa rather than the full rating. The 250 mm stroke is well inside the 500 mm standard limit, but at this length keep side loads off the 16 mm rod and guide the load externally. This SKU has no magnet, so CMSG / DMSG / EMSG switches cannot be fitted - order the S code if you need position sensing. Mount it with LB foot, FA flange, CB clevis or SDB pivot brackets, and add I or Y rod knuckles. Note that the rod drifts when air is lost; use an external lock or pilot check valve to hold a load.
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 MG40X250 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. It is double acting, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), and moves at 30-800 mm/s.
Not as supplied - this SKU has no magnet, so no switch can be mounted. Order the MG40X250S to enable CMSG, DMSG or EMSG reed sensors. The cylinder itself is a JIS round-body unit with a SUS304 barrel, 1/8" ports and fixed anti-impact bumper pads that soften the stroke ends without acting as a brake.
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