Airtac MGC Stainless Steel Mini Cylinder MGC40X300
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X300 is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC40X300
The AirTAC MGC40X300 is a double acting, JIS-standard round-body mini cylinder with a 40 mm bore and 300 mm stroke, fitted with a variable air cushion at both ends. Unlike the bumper-type MG, the cushion needles at each end let you dial in the deceleration so the piston slows smoothly before reaching the covers - a real advantage at higher piston speeds or when the moving load is heavy. At 0.5 MPa this bore delivers 628.3 N push and 527.8 N pull, which is roughly 64 kgf of theoretical push force; as a rule of thumb, plan on about 38 kg as a safe working vertical load (about 0.6 of the push force).
Construction follows the JIS mini-cylinder footprint: a SUS304 stainless barrel with covers and stainless block riveted and rolled onto it, plus a hard-chrome plated (20 um) 16 mm rod with M14x1.5 male thread. The two-way piston seal also stores lubricant, and the 300 mm stroke stays well inside the 500 mm maximum standard stroke for this bore. Ports are 1/8". This model is supplied without the magnet, so no position sensor can be mounted; order the -S version if you need CMSG, DMSG or EMSG switch sensing.
Airtac MGC Stainless Steel Mini Cylinder MGC40X300 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X300 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Acting type | Double acting + cushion |
| 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 | Variable air cushion, both ends |
| 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 MGC Stainless Steel Mini Cylinder MGC40X300
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB | Mounting: FA flange, LB foot. |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MGC Stainless Steel Mini Cylinder MGC40X300 Is Used
Conveyor push-off stations
The 628.3 N push force at 0.5 MPa ejects cartons or trays from a conveyor line, while the variable air cushion lets the cylinder run at higher speeds without the piston slamming the covers on every cycle.
Light clamping and pressing
With 879.6 N push at 0.7 MPa, the 40 mm bore suits small press-fit, staking and clamp fixtures where the adjustable end-of-stroke deceleration protects the tooling and the fixture.
Automated slide and gate actuation
The 300 mm stroke indexes chutes, gates and small slides in packaging and assembly machinery; the SUS304 barrel and hard-chrome rod stand up to plant environments, and the -S option adds CMSG/DMSG/EMSG position feedback.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X300 the Right Cylinder?
Choose the MGC40X300 when you need a compact 40 mm bore over a 300 mm stroke and your cycle speed or moving mass would hammer the covers of a bumper-type cylinder. Step down to the MGC32 for lighter loads (402.2 N push at 0.5 MPa) or up to the MGC50 for heavier ones (981.3 N push at 0.5 MPa); at 40 mm bore there are two sizes in each direction within the MGC range. If your application is slow and light and you do not need adjustable deceleration, the plain bumper MG in 40 mm bore is the lower-cost alternative. Mounting is FA flange or LB foot, with I and Y rod knuckles available, and PT thread ports as standard (G or NPT on request). With a 300 mm stroke, keep the rod side-loading low and guide external loads separately - the long rod is more sensitive to misalignment than a short-stroke unit. Remember the variable air cushion only decelerates the stroke end; it is not a lock, so use an external rod lock or pilot check valve if the load must be held on air loss.
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) & 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 and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MGC Stainless Steel Mini Cylinder MGC40X300 FAQ
At 0.5 MPa the 40 mm bore gives 628.3 N push and 527.8 N pull; at 0.7 MPa it gives 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 a 1.5 MPa (215 psi) proof pressure.
The cushion is adjustable at both stroke ends: turn the needle to throttle the exhaust air and decelerate the piston smoothly, which protects the covers at speeds up to 800 mm/s. It only decelerates - it is not a brake or lock, and the MGC40X300 will not hold position on air loss. For a held load, add an external rod lock or pilot check valve.
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