Airtac MG Stainless Steel Mini Air Cylinder MG20X300S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X300S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm 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
- Stroke300 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 MG20X300S
With a 20 mm bore pushing about 157 N at 0.5 MPa (219.8 N at 0.7 MPa), the MG20X300S is a double acting JIS round-body mini cylinder with a 300 mm stroke. Its barrel is SUS304 stainless steel riveted onto the covers, paired with a hard-chrome plated 8 mm rod, so it shrugs off damp washdown and outdoor air far better than painted-steel minis. Because the footprint follows the JIS mini-cylinder standard, it drops onto standard JIS brackets and rod knuckles when you need a fast swap or a spares-friendly design.
The 300 mm stroke covers long reach points, and the fitted magnet means CMSG, DMSG or EMSG switches can be clipped on for end-of-stroke signalling without reordering. Plan real work at roughly 94 N (about 0.6 of the push rating) at 0.5 MPa, and for vertical lifting count on roughly 8 kg with a 2:1 margin. Note the fixed anti-impact bumper pads only soften the stroke ends; if air is lost the rod drifts freely, so use an external rod lock or pilot check valve where a load must stay put.
Airtac MG Stainless Steel Mini Air Cylinder MG20X300S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X300S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 MG20X300S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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 MG20X300S Is Used
Bottling line reject pusher
The long 300 mm reach sweeps underweight bottles off a narrow conveyor; at 94 N usable push at 0.5 MPa it handles light PET containers with margin, and the stainless barrel tolerates frequent washdown.
Pick-and-confirm slide on an assembly bench
The built-in magnet feeds CMSG or DMSG switch signals to the PLC for both stroke ends, so the operator gets a positive confirm light before the next screwdriving cycle starts.
Lab sample elevator
Lifting about 8 kg vertically with a 2:1 margin, the cylinder raises sample racks between bench levels, while the fixed bumper pads keep the 300 mm travel from slamming at either end.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X300S the Right Cylinder?
At 157 N push at 0.5 MPa this bore 20 sits at the bottom of the MG range; step up to the 25 mm bore (245 N) when the load creeps past about 90 N, or drop the stroke if 300 mm is more than the mechanism needs. If you need adjustable end-of-stroke deceleration instead of fixed bumpers, the cushioned MGC is the variant to look at. Mount it LB foot, FA flange, CB clevis or SDB pivot, and remember the magnet is already built in for CMSG / DMSG / EMSG sensors. With a 300 mm stroke on an 8 mm rod, keep side loads off the rod and guide the work externally to avoid bending.
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 MG20X300S FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa it pushes 219.8 N and pulls 184.7 N. 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.
Yes. The S in MG20X300S means the piston magnet is factory-fitted, so AirTAC CMSG, DMSG or EMSG reed/electronic switches clamp directly onto the stainless barrel for end-of-stroke detection. The 1/8" ports and PT thread keep plumbing simple, and LB foot, FA flange, CB clevis or SDB pivot mounts all accept the same JIS-standard accessory footprint.
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