Airtac MGC Stainless Steel Mini Cylinder MGC20X125
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC20X125 is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MGC20X125
The AirTAC MGC20X125 is a double acting, JIS-standard round-body mini cylinder with a 20 mm bore and 125 mm stroke, fitted with a variable air cushion at both ends. Unlike the bumper-type MG, the cushion needles let you dial in a smooth deceleration near each end of travel, so this 20 mm bore can run at higher piston speeds and carry heavier moving 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.
Construction follows the JIS mini footprint: a SUS304 stainless barrel with covers and stainless block riveted and rolled on, plus a hard-chrome plated (20 um) 8 mm rod with an M8x1.25 male thread and M5x0.8 ports. The two-way piston seal also stores lubricant for long service life. Operating range is 0.15-1.0 MPa (22-145 psi) with air filtered to 40 um, speeds of 30-800 mm/s, and temperatures from -20 to +70 C. As a computed buyer insight, applying the usual 0.6 safety factor to the 157 N push force gives a safe working load of roughly 9.6 kgf (about 9.6 kg horizontal); for vertical lifting, halve that again to around 4.8 kg.
Airtac MGC Stainless Steel Mini Cylinder MGC20X125 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC20X125 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MGC20X125
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MGC20X125 Is Used
Small parts ejection
The variable air cushion lets the 20 mm bore eject lightweight components from fixtures at higher speed, decelerating smoothly at end of stroke instead of slamming the covers.
Conveyor push-off stations
With 157 N push at 0.5 MPa, this cylinder parts products off a moving belt, and the adjustable cushion absorbs the momentum of each push cycle for quieter, longer-lasting operation.
Compact test and press fixtures
The SUS304 stainless barrel and hard-chrome rod suit light clamping or test-actuation duties where a cushioned 125 mm stroke and clean, corrosion-resistant construction are wanted.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC20X125 the Right Cylinder?
Bore 20 is the smallest MGC, so there is no smaller cushioned model in the family; if 157 N push at 0.5 MPa is marginal, step up to the 25 mm bore (245.3 N) or the 32 mm bore (402.2 N). If your speed is low and the load is light, the plain bumper MG in the same 20 mm bore is the no-cushion alternative. The 125 mm stroke sits well inside the 500 mm maximum standard stroke for this bore, and non-standard strokes up to 800 mm are made to order. Mount with the FA flange or LB foot, and add I or Y rod knuckles where the tooling needs a pivot. Order the -S magnet option if you want position sensing with CMSG, DMSG or EMSG switches; without the magnet no sensor can be mounted. At 125 mm stroke with a 8 mm rod, keep side loads low or guide the load externally to protect the bearings.
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 MGC20X125 FAQ
At 0.5 MPa the 20 mm bore gives 157 N push and 131.9 N pull; at 0.7 MPa it gives 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa. For a safe working load, apply about 0.6 to the push force, roughly 9.6 kgf, and halve that for vertical lifting.
The cushion is an adjustable air cushion at both stroke ends: turn the needle to throttle exhaust and decelerate the piston smoothly, which suits higher speeds and heavier moving loads than the fixed bumper MG. It only decelerates end of stroke; it is not a lock or brake, and the MGC does not hold position on air loss. Use an external rod lock or pilot check valve for a held load.
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