Airtac MG Stainless Steel Mini Air Cylinder MG20X40
The AirTAC Airtac MG Stainless Steel Mini Air Cylinder MG20X40 is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed anti-impact bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MG Stainless Steel Mini Air Cylinder MG20X40
Compact and corrosion-ready, the MG20X40 is a double acting JIS round-body mini cylinder with a 20 mm bore and a short 40 mm stroke. Its SUS304 stainless barrel is riveted onto the covers with a hard-chrome plated 8 mm rod, so it shrugs off damp or washdown conditions that swell painted-steel minis. At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa that rises to 219.8 N push and 184.7 N pull, with a theoretical ceiling of 32 kgf at 1.0 MPa.
For real-world sizing, budget roughly 94 N (about 9.6 kg of force) of usable work at 0.5 MPa instead of the full 157 N rating, which vertically equates to lifting a part of around 8 kg with margin. The fixed anti-impact bumper pad at each stroke end softens direction changes but is not an adjustable cushion, and with no air applied the rod is free to drift, so add an external check valve or rod lock if the load must stay put. Because the footprint follows the JIS mini-cylinder standard, standard brackets and I/Y rod knuckles bolt straight on.
Airtac MG Stainless Steel Mini Air Cylinder MG20X40 Technical Specifications
| Model | Airtac MG Stainless Steel Mini Air Cylinder MG20X40 |
|---|---|
| Series | MG JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MG20X40
| MG | JIS round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MG20X40 Is Used
Small-part ejection on assembly benches
The 157 N push at 0.5 MPa is enough to kick finished connectors or caps off a fixture, and the 40 mm stroke keeps the cycle tight.
Light gate and flap actuation on filling lines
Stainless barrel plus 1/8" ports suit washdown-adjacent packaging stations; about 9.6 kg of usable force flips diverters reliably.
Sample pusher in lab automation
The 8 mm chrome rod and short stroke index trays and vials gently, while the bumper pad quiets each end of travel.
Is the Airtac MG Stainless Steel Mini Air Cylinder MG20X40 the Right Cylinder?
At 157 N push (0.5 MPa) this 20 mm bore suits light clamping and small part transfer; step down is not possible within MG (20 mm is the smallest bore), while the 25 mm bore gives 245.3 N push if you need roughly 55% more force. If your cycle runs fast or carries heavier loads, the cushioned MGC series in 25 mm or larger is the better match. The 40 mm stroke keeps rod side-loading low; for strokes beyond 500 mm a non-standard build up to 800 mm is made to order. This SKU carries no magnet, so CMSG/DMSG/EMSG switches cannot be fitted - order the -S version if you need position sensing. Mount it with LB foot, FA flange or CB clevis hardware.
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 MG20X40 FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N. At 0.7 MPa the figures are 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. The MG20X40 has no built-in magnet, so CMSG, DMSG or EMSG switches cannot detect rod position. Order the magnet-equipped MG20X40S if sensing is required, and note the fixed bumper pads only soften stroke-end impact - they do not hold or brake a load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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