Airtac MGC Stainless Steel Mini Cylinder MGC40X300S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X300S 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 MGC40X300S
The AirTAC MGC40X300S is a JIS-standard round-body mini cylinder, double acting, with a 40 mm bore and 300 mm stroke. Unlike the bumper-equipped MG, this build carries a variable air cushion at both stroke ends: turn the cushion needle to dial in smooth deceleration of the piston near end of travel, so the cylinder tolerates higher piston speeds and heavier moving loads without hammering the covers. The cushion is adjustable, not a fixed pad, which makes the MGC the right pick in the MG family when your cycle runs fast or the moving mass is significant.
Construction follows the JIS mini-cylinder pattern: covers and a SUS304 stainless block are riveted and rolled onto a SUS304 stainless barrel, with a 16 mm hard-chrome plated (20 um) carbon-steel rod carrying an M14x1.5 male thread. The two-way piston seal also stores lubricant, and ports are 1/8". At 0.5 MPa the bore 40 delivers 628.3 N push and 527.8 N pull, roughly 64 kgf of push force; a common rule of thumb is to size vertical lifting at about 0.6 of that, so plan on roughly 38 kg safe vertical load. The fitted magnet (the S in the code) accepts CMSG, DMSG or EMSG switches for end-of-stroke detection.
Airtac MGC Stainless Steel Mini Cylinder MGC40X300S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X300S |
|---|---|
| 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 MGC40X300S
| 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 MGC40X300S Is Used
High-speed push-off on assembly stations
Running at up to 800 mm/s, the variable air cushion decelerates the piston smoothly at both ends, so fast eject or clamp cycles do not hammer the covers at the 628.3 N push force this bore delivers at 0.5 MPa.
Conveyor divert and stopper actuation
A 300 mm stroke suits diverting or stopping product on transfer lines; the cushion absorbs the moving load at end of travel, and the fitted magnet with CMSG or DMSG switches confirms extend and retract positions.
Packaging machine gate and flap control
The SUS304 stainless barrel and hard-chrome rod stand up to washdown-prone packaging environments, while the adjustable cushion protects gates and flaps driven at speed with loads near the 64 kgf push class.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X300S the Right Cylinder?
Choose the MGC40X300S when you need a 40 mm bore with a 300 mm stroke and end-of-stroke deceleration you can tune. At 0.5 MPa it pushes 628.3 N; stepping supply to 0.7 MPa raises push to 879.6 N and pull to 738.9 N, with a theoretical maximum of 128.1 kgf at 1.0 MPa. If you need more force in this family, step up to the MGC50 (981.3 N push at 0.5 MPa); if 628.3 N is generous for your load, the MGC32 (402.2 N) or MGC25 (245.3 N) may save space. For bores 20 to 40 where no cushion is needed, the plain bumper MG is the alternative. Mounting is FA flange or LB foot, with I and Y rod knuckles available, and the S suffix means the magnet is already fitted for CMSG/DMSG/EMSG switches. The 300 mm stroke is within the 500 mm standard range for this bore; strokes beyond 500 mm (up to 800 mm) are made to order. On long strokes, keep the rod side-load low or add external guidance, since the 16 mm rod is not intended to carry lateral loads.
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 MGC40X300S FAQ
At 0.5 MPa (72.5 psi) it delivers 628.3 N push and 527.8 N pull; at 0.7 MPa (101.5 psi) push rises to 879.6 N and pull to 738.9 N. The theoretical maximum at 1.0 MPa (145 psi) is 128.1 kgf. Operating pressure range is 0.15-1.0 MPa (22-145 psi) with air filtered to 40 um.
The cushion needle at each stroke end meters exhaust air to decelerate the piston smoothly near the covers; it is adjustable, not a fixed bumper pad. It only slows the piston at end of travel and is not a lock or brake: on air loss the MGC40X300S will not hold position, so use an external rod lock or pilot check valve for a held load. Mounting is FA flange or LB foot, and the fitted magnet accepts CMSG/DMSG/EMSG switches.
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