Airtac MG Stainless Steel Mini Air Cylinder MG20X120
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X120 is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 120mm 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
- Stroke120 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 MG20X120
With a 20 mm bore and 120 mm stroke, this MG delivers about 157 N of push and 131.9 N of pull at 0.5 MPa, rising to 219.8 N push at 0.7 MPa. It is a double acting JIS round-body mini cylinder: air extends and retracts the rod, and a fixed anti-impact bumper pad at each stroke end softens the direction change. The bumper decelerates only - it is not an adjustable air cushion, which is the MGC variant.
The barrel is SUS304 stainless steel riveted onto the covers, paired with a hard-chrome plated rod, so it shrugs off damp, washdown-prone or outdoor spots where painted minis corrode. Because the footprint follows the JIS mini-cylinder standard, it drops into standard JIS brackets and I or Y rod knuckles, making spares and redesigns simple. In practical terms, plan on roughly 94 N (about 9.5 kg lifted) of real vertical work at 0.5 MPa with a 2:1 margin, rather than the full 157 N rating.
Airtac MG Stainless Steel Mini Air Cylinder MG20X120 Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X120 |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 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 MG20X120
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 MG20X120 Is Used
Lab sample pusher
The 157 N push at 0.5 MPa slides sample trays between test stations, and the SUS304 barrel wipes clean in humid lab air.
Bottling line reject gate
A 120 mm stroke kicks off-spec bottles from the conveyor, with the bumper pad softening every reversal at up to 800 mm/s.
Carton flap tucker
About 9.5 kg of usable vertical lift at 0.5 MPa presses flaps closed on small cartons without crushing the board.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X120 the Right Cylinder?
At 0.5 MPa this bore pushes 157 N. If your load is lighter or space is tight, there is no smaller MG bore, so consider the MSG single-acting version; if you need more force, the 25 mm bore gives 245.3 N push at 0.5 MPa. For high-speed or heavy-load stops needing an adjustable cushion, step up to the MGC series instead. Note that a plain MG does not hold position when air is lost - the piston drifts - so add an external rod lock or a pilot check valve for held loads. This SKU has no magnet, so CMSG / DMSG / EMSG sensors cannot be fitted; order the -S code if you need position sensing. Mount it with LB foot, FA flange, CB clevis or SDB pivot brackets.
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 MG20X120 FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N. At 0.7 MPa those figures rise to 219.8 N push and 184.7 N pull. The theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure spans 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed runs 30-800 mm/s.
Not on this SKU - it has no built-in magnet, and the CMSG / DMSG / EMSG switches only work with the optional S magnet code. Order MG20X120S for sensing. The cylinder itself is a JIS-standard round-body unit with a 1/8" port, M8x1.25 male rod thread and fixed bumper pads, not an adjustable cushion.
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