Airtac MGC Stainless Steel Mini Cylinder MGC40X250S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X250S is a genuine double acting + cushion 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 + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC40X250S
The AirTAC MGC40X250S is a JIS-standard round-body mini cylinder, double acting, with a variable air cushion at both stroke ends. Unlike the bumper-type MG, the cushion needles can be adjusted to decelerate the piston smoothly near end of travel, so this 40 mm bore cylinder tolerates higher piston speeds and heavier moving loads without hammering the covers. At 0.5 MPa it delivers 628.3 N push and 527.8 N pull, rising to 879.6 N push at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa. The 250 mm stroke sits well inside the 500 mm standard range for this bore, and the fitted magnet (S code) allows CMSG, DMSG or EMSG switch mounting for position feedback.
Construction follows the proven MG family layout: a SUS304 stainless barrel with covers and stainless block riveted and rolled into place, plus a hard-chrome plated 16 mm rod (20 um plating) running on a two-way piston seal that also stores lubricant. Operating pressure is 0.15 to 1.0 MPa (22 to 145 psi) with 1.5 MPa (215 psi) proof pressure, over a temperature range of -20 to +70 C and speeds of 30 to 800 mm/s. As a rule of thumb, halve the 0.5 MPa push force for vertical lifting: about 32 kgf, or roughly 19 kg with a 0.6 safety factor. Note the cushion only decelerates end of stroke; it is not a lock, so use an external rod lock or pilot check valve to hold a load on air loss.
Airtac MGC Stainless Steel Mini Cylinder MGC40X250S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X250S |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MGC40X250S
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MGC40X250S Is Used
Conveyor stop and divert
The 628.3 N push at 0.5 MPa stops cartons or totes cleanly, while the variable air cushion absorbs the moving mass at end of stroke on fast lines running up to 800 mm/s.
Case clamp and eject
With 879.6 N push at 0.7 MPa and adjustable deceleration at both ends, the cylinder clamps cases or ejects product without jarring the frame, and the -S magnet feeds position signals to the PLC.
Small press and forming station
A theoretical 128.1 kgf at 1.0 MPa suits light pressing, staking and forming jigs; the JIS round-body stainless build resists washdown and the cushion protects tooling at high cycle rates.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X250S the Right Cylinder?
At 40 mm bore this is the upper-middle of the MGC range: 628.3 N push at 0.5 MPa versus 402.2 N for the 32 mm and 981.3 N for the 50 mm. If your cycle runs fast or carries a moving load into end of stroke, the adjustable air cushion is the reason to pick MGC over the bumper-type MG (which covers only 20 to 40 mm bores); if you need more force with the same cushion, step up to the 50 mm with 981.3 N. The 250 mm stroke is standard (up to 500 mm for this bore, non-standard to 800 mm made to order). Porting is 1/8" with an M14x1.5 male rod thread. Mount with the FA flange or LB foot, add I or Y rod knuckles if the tooling needs a pivot, and keep the -S magnet so CMSG/DMSG/EMSG switches can be fitted. At 250 mm of stroke, support the tooling or use a guide to keep side loads off the chrome rod.
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 MGC40X250S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N; at 0.7 MPa that rises to 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. For vertical lifting, plan on roughly half the 0.5 MPa push force, about 32 kgf, or around 19 kg with a 0.6 safety factor.
The cushion needle at each end is adjustable, so you dial in the deceleration of the piston near end of stroke; it is not a fixed bumper pad. It only slows the piston, it does not lock or brake the rod, and the cylinder will not hold position on air loss. Fit an external rod lock or pilot check valve for a held load. The SUS304 stainless barrel and hard-chrome rod suit the 0.15 to 1.0 MPa (22 to 145 psi) operating range.
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