Airtac MGC Stainless Steel Mini Cylinder MGC20X300S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC20X300S is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm stroke, M5×0.8 air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke300 mm
- Port sizeM5×0.8
- Acting typeDouble acting + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC20X300S
The AirTAC MGC20X300S is a double acting, JIS-standard round-body mini cylinder with a 20 mm bore and a 300 mm stroke, fitted with a variable air cushion at both ends. Unlike the bumper-type MG, the cushion needles at each stroke end can be adjusted to decelerate the piston smoothly, so this bore size can run at higher speeds or move heavier loads without hammering the covers. At 0.5 MPa it delivers 157 N push and 131.9 N pull, rising to 219.8 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. The S suffix means a magnet is built into the piston, so CMSG, DMSG or EMSG reed switches can be clipped on for end-of-stroke signalling.
Construction follows the MG family recipe: a SUS304 stainless barrel with covers and stainless block riveted and rolled into place, plus a hard-chrome plated (20 um) carbon-steel rod and a two-way piston seal that also stores lubricant. Operating pressure is 0.15 to 1.0 MPa (22 to 145 psi) with air filtered to 40 um, speed range 30 to 800 mm/s, and a temperature window of -20 to +70 C. Ports are M5x0.8 and the male rod thread is M8x1.25. For a practical sizing rule, treat roughly 0.6 of the 157 N push force as a safe working load, which works out to about 9.6 kgf for horizontal duty; halve that again to around 5 kg if the load is lifted vertically. Note that the cushion only decelerates the stroke end, so a held load still needs an external rod lock or pilot check valve.
Airtac MGC Stainless Steel Mini Cylinder MGC20X300S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC20X300S |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Acting type | Double acting + cushion |
| Port size | M5×0.8 |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MGC20X300S
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | 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 MGC20X300S Is Used
High-cycle pick and place
The adjustable air cushion lets this 20 mm bore cycle at up to 800 mm/s and decelerate smoothly at both ends, protecting the covers on fast small-part transfer arms, while the fitted magnet feeds position signals to the PLC.
Light clamping and ejecting
With 157 N push at 0.5 MPa and 219.8 N at 0.7 MPa, the MGC20X300S ejects small parts from fixtures or clamps light workpieces, and the variable cushion absorbs the shock when the piston seats against the end of the 300 mm stroke.
Sorting and diverting on conveyors
Mounted on an LB foot or FA flange, the stainless SUS304 barrel and hard-chrome rod suit pusher diverters that nudge cartons or bins off a line, with the cushioned stroke end preventing bounce at high divert rates.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC20X300S the Right Cylinder?
At 20 mm bore this is the smallest MGC available, so there is no smaller cushioned step below it; if you need more force, the 25 mm bore already lifts push force from 157 N to 245.3 N at 0.5 MPa. If your application runs slowly with light loads and does not need end-of-stroke deceleration, the plain bumper-type MG in the same bore is the lower-cost alternative for diameters 20 to 40. The 300 mm stroke sits comfortably inside the 500 mm maximum standard stroke for this bore, so it ships as a standard item, and non-standard strokes up to 800 mm can be made to order. Mount with the FA flange or LB foot, and add I or Y rod knuckles if the tooling needs a pivoting joint; the SDB/CB pivot is not offered on this series. The fitted magnet accepts CMSG, DMSG or EMSG switches. With an 8 mm rod on a 300 mm stroke, keep side loading low or add external guidance, because long-stroke mini cylinders are sensitive to off-axis forces.
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 MGC20X300S FAQ
At 0.5 MPa it pushes with 157 N and pulls with 131.9 N; at 0.7 MPa those rise to 219.8 N push and 184.7 N pull. The theoretical maximum force of the 20 mm bore is 32 kgf at 1.0 MPa. Operating pressure spans 0.15 to 1.0 MPa (22 to 145 psi) with air filtered to 40 um, and speed can be set anywhere from 30 to 800 mm/s.
The cushion is adjustable, not a fixed pad: a needle at each stroke end meters the exhaust air so the piston decelerates smoothly over the last part of travel, which is why the MGC tolerates higher speeds and heavier moving loads than the bumper-type MG. It only brakes the end of the stroke, though. It is not a lock or brake, and the cylinder will not hold position if air pressure is lost, so use an external rod lock or pilot check valve for a suspended or held load.
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