Airtac MGC Stainless Steel Mini Cylinder MGC40X50S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X50S is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MGC40X50S
The AirTAC MGC40X50S is a double acting, JIS-standard round-body mini cylinder with a 40 mm bore and a 50 mm stroke, and unlike the bumper-type MG it carries a variable air cushion at both stroke ends. Turn the cushion needle in and the piston decelerates smoothly before it reaches the cover, so this 40 mm bore can run at higher piston speeds and move heavier loads without hammering the end covers. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N; at 0.7 MPa those figures rise to 879.6 N and 738.9 N, with a theoretical maximum of 128.1 kgf at 1.0 MPa. Applying the usual 0.6 rule of thumb to the 0.5 MPa push force gives a safe working load of roughly 376.9 N, or about 38 kg, and roughly half that (about 19 kg) if the load is lifted vertically.
Construction follows the JIS mini-cylinder pattern: an SUS304 stainless barrel with covers and stainless block riveted and rolled onto it, and a hard-chrome plated (20 um) carbon-steel rod that is 16 mm in diameter with a male M14x1.5 thread. Ports are 1/8", the fluid is air filtered to 40 um, operating pressure spans 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, temperature range is -20 to +70 C, and piston speed runs 30-800 mm/s. Because the S code is in this model, a magnet is fitted, so CMSG, DMSG or EMSG reed switches can be clipped on for position sensing. Mount it with an FA flange or LB foot, add an I or Y rod knuckle if the tooling needs a swivel, and remember that the cushion only decelerates the stroke end: it is not a lock, so a held load needs an external rod lock or pilot check valve.
Airtac MGC Stainless Steel Mini Cylinder MGC40X50S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X50S |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MGC40X50S
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MGC40X50S Is Used
High-cycle push-off station
A 40 mm bore pushing finished parts off a conveyor at speed benefits from the variable air cushion, which decelerates the piston near end of stroke instead of slamming the cover, extending service life at 30-800 mm/s cycle rates.
Case clamp and hold-down
With 628.3 N push at 0.5 MPa (about 38 kg safe working load at the 0.6 rule), the MGC40X50S clamps cartons or fixtures firmly, and the cushion softens contact so delicate packaging is not jarred at stroke end.
Small assembly press head
Light pressing and staking tasks in the 879.6 N push range at 0.7 MPa suit this cylinder; the fitted magnet and CMSG/DMSG/EMSG switches give end-of-stroke confirmation for automated assembly cells.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X50S the Right Cylinder?
Sizing the MGC40X50S both ways: it sits in the middle of the cushioned MGC range, one step up from the 32 mm bore (402.2 N push at 0.5 MPa) and one step below the 50 mm bore (981.3 N push at 0.5 MPa). If your load needs about 628 N of push at 0.5 MPa and you want adjustable end-of-stroke deceleration, this is the size. If the bore is 20 to 40 mm and you do not need cushioning at all, the plain bumper-type MG is the no-cushion alternative with the same JIS footprint; the cushioned MGC is also the only route to 50 and 63 mm bores in this family. The variable air cushion is the main reason to pick MGC over MG when cycle speeds climb toward the upper part of the 30-800 mm/s range or the moving mass is heavy. Mounting is FA flange or LB foot, with I and Y rod knuckles available; the fitted magnet (S code) accepts CMSG, DMSG and EMSG switches. At 50 mm stroke side-load risk is low, but keep the rod coupling aligned and avoid lateral loads on the 16 mm rod; strokes beyond the 500 mm standard maximum, up to 800 mm, are made to order.
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 MGC40X50S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push force is 879.6 N and the pull force 738.9 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. Using the common 0.6 safety factor on the 0.5 MPa push force gives a safe working load of about 38 kg, or roughly 19 kg for a vertical lift.
The cushion is an adjustable air chamber at each stroke end: turn the needle valve to meter the exhaust and the piston decelerates smoothly before reaching the cover, which is why the MGC tolerates higher speeds and heavier moving loads than the bumper-type MG. It is a deceleration feature only, not a lock or brake, so the MGC40X50S will not hold position on air loss; fit an external rod lock or pilot check valve for a held load.
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