Airtac MG Stainless Steel Mini Air Cylinder MG20X30S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X30S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 30mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke30 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed anti-impact bumper pads
About the Airtac MG Stainless Steel Mini Air Cylinder MG20X30S
With a 20 mm bore and a short 30 mm stroke, this MG delivers 157 N push and 131.9 N pull at 0.5 MPa (219.8 N / 184.7 N at 0.7 MPa), double acting so air drives the rod out and back. The barrel is SUS304 stainless steel riveted onto the covers in round-body JIS mini-cylinder form, with a hard-chrome plated 8 mm rod, so it shrugs off damp, washdown-prone spots where painted minis corrode.
Because the S code is in the model, a magnet is built into the piston and CMSG, DMSG or EMSG switches can be clipped on for end-of-stroke signalling. At 0.5 MPa the push force works out to roughly 16 kg of lift, so plan on about 8 kg vertical lifting with a 2:1 margin. The fixed anti-impact bumper pad at each end softens direction change; it decelerates only and is not an adjustable air cushion.
Airtac MG Stainless Steel Mini Air Cylinder MG20X30S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X30S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| 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 | Fixed anti-impact bumper pads |
| 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 MG Stainless Steel Mini Air Cylinder MG20X30S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×30 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB / CB / SDB | Mounting: FA flange, LB foot, CB clevis, SDB pivot bracket (with CB). |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, CB clevis, SDB pivot block, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MG Stainless Steel Mini Air Cylinder MG20X30S Is Used
Sensor-checked part present
The built-in magnet plus a CMSG switch confirms a 30 mm push stroke completed on a small-part sorting station, with 157 N of push at 0.5 MPa doing the actual part ejection.
Lab sample indexing
A short 30 mm advance indexes sample trays in analytical equipment; the SUS304 stainless barrel tolerates the frequent wipe-downs these benches get.
Carton flap tuck
On a packaging line, the compact round body reaches between guides to tuck carton flaps, with the bumper pad absorbing the repeated end-of-stroke stop.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X30S the Right Cylinder?
At 157 N push (0.5 MPa) this bore 20 suits light clamping, ejecting and sorting of small parts; if you need more, the bore 25 MG gives about 245 N at the same pressure, while staying with bore 20 means no smaller MG exists. The 30 mm stroke keeps the body compact for tight envelopes. Note that when air is lost the piston drifts freely - for a held position add an external rod lock or a pilot check valve. Mount with LB foot, FA flange, CB clevis or SDB pivot, and pair I or Y knuckles on the rod; the 1/8" port takes PT thread as standard.
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 / CB / SDB) & 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/impact settings and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MG Stainless Steel Mini Air Cylinder MG20X30S 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 at 1.0 MPa is 32 kgf. Operating pressure spans 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), and rod speed runs 30-800 mm/s.
Yes - the S in the model code means a piston magnet is factory-fitted, so AirTAC CMSG, DMSG or EMSG reed/electronic switches mount directly on the stainless barrel for end-of-stroke detection.
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