Airtac MG Stainless Steel Mini Air Cylinder MG20X80S
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X80S is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MG20X80S
Compact yet capable, the MG20X80S is a double acting JIS round-body mini cylinder with a 20 mm bore and 80 mm stroke. Its SUS304 stainless barrel and hard-chrome plated rod (M8x1.25 male thread, 8 mm rod) shrug off damp and washdown conditions that quickly ruin painted-steel minis, and the riveted covers keep the body short and light. The 1/8" port feeds both directions, and because the S code is in the model, CMSG, DMSG or EMSG switches can be clipped straight on.
At 0.5 MPa this bore pushes 157 N and pulls 131.9 N; at 0.7 MPa it reaches 219.8 N push and 184.7 N pull, with a theoretical ceiling of 32 kgf at 1.0 MPa. In practice, plan on roughly 94 N of real work at 0.5 MPa, and for vertical lifts count on about 8 kg with a 2:1 margin. The fixed anti-impact bumper pads soften the ends of the 80 mm travel, but they only decelerate - they never lock or hold a load when air is lost.
Airtac MG Stainless Steel Mini Air Cylinder MG20X80S Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X80S |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MG20X80S
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MG20X80S Is Used
Bottle presence checks on a filling line
The built-in magnet lets a CMSG switch confirm rod position, while 157 N at 0.5 MPa is ample to push empty PET bottles off a conveyor lane.
Sample vial ejector in a lab autosampler
An 80 mm stroke clears a 60 mm magazine slot with margin, and the stainless barrel tolerates the frequent wipe-downs of a clean bench.
Carton flap tucker on a small box sealer
About 8 kg of vertical lift capacity with a 2:1 margin is enough to press flaps down, and the bumper pads quiet the rapid 30-800 mm/s cycling.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X80S the Right Cylinder?
For light clamping and small part handling, the 20 mm bore is the smallest MG offers, so there is nothing below it; if 157 N at 0.5 MPa feels marginal, step up to the 25 mm bore (245.3 N push) or the 32 mm bore (402.2 N). Running above 500 mm/s or carrying a heavier payload? The cushioned MGC in the same footprint gives adjustable end-of-stroke control. This SKU already carries the magnet, so no re-order is needed to fit CMSG / DMSG / EMSG switches, and LB foot, FA flange, CB clevis or SDB pivot brackets bolt to the JIS-standard mounting interface. Note that a plain MG drifts when the valve centres - add a pilot check valve or external rod lock if the 80 mm position must hold.
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 MG20X80S FAQ
Bore 20 mm, stroke 80 mm, rod 8 mm with M8x1.25 male thread, 1/8" port. Push force is 157 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa, 219.8 N push and 184.7 N pull. Theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa = 22-145 psi, proof pressure 1.5 MPa = 215 psi, speed 30-800 mm/s, temperature -20 to +70 C, air filtered to 40 um.
No - it means a magnet is built into the piston so CMSG, DMSG or EMSG reed switches can be mounted anywhere along the stainless barrel for end-of-stroke or mid-stroke signalling. Mechanically it is the same JIS round-body cylinder: double acting, with fixed anti-impact bumper pads that only soften the ends of travel and cannot hold a load against lost air pressure.
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