Airtac MGC Stainless Steel Mini Cylinder MGC20X400
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC20X400 is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 400mm stroke, M5×0.8 air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke400 mm
- Port sizeM5×0.8
- Acting typeDouble acting + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC20X400
The AirTAC MGC20X400 is a double acting, JIS-standard round-body mini cylinder with a 20 mm bore and a 400 mm stroke, fitted with a variable air cushion at both ends. Unlike the bumper-style MG, this cushion is adjustable: turn the needle valve at each cover to dial in how hard the piston decelerates near end of travel, so you can run higher piston speeds or move heavier loads without hammering the covers. At 0.5 MPa it delivers 157 N push and 131.9 N pull, rising to 219.8 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. As a rule of thumb, keep working loads near 0.6 of the push force, so about 9 kgf (roughly 94 N) is a safe continuous rating for this bore.
Construction follows the JIS mini-cylinder footprint: a SUS304 stainless barrel with covers and stainless block riveted and rolled into place, plus a hard-chrome plated (20 um) carbon-steel rod and a two-way piston seal that also stores lubricant. It is not a tie-rod or extruded-profile design. The 400 mm stroke sits within the 500 mm maximum standard stroke for this bore, so it ships as a catalog item. Operating pressure is 0.15 to 1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature range -20 to +70 C, and speed range 30 to 800 mm/s, with air filtered to 40 um as the fluid. This SKU has no magnet, so no position sensor can be mounted; order the S code to enable CMSG, DMSG or EMSG switches. Mounting options are FA flange and LB foot, with I and Y rod knuckles available, and the cushion decelerates the stroke end only - it is not a lock, so use an external rod lock or pilot check valve if the load must be held on air loss.
Airtac MGC Stainless Steel Mini Cylinder MGC20X400 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC20X400 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 400 mm |
| Acting type | Double acting + cushion |
| Port size | M5×0.8 |
| 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 | Variable air cushion, both ends |
| 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 MGC Stainless Steel Mini Cylinder MGC20X400
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB | Mounting: FA flange, LB foot. |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MGC Stainless Steel Mini Cylinder MGC20X400 Is Used
High-speed small-part ejection
Pushing lightweight parts off a conveyor or chute at the upper end of the 30-800 mm/s speed range, where the variable air cushion stops the piston smoothly instead of banging the covers on every cycle.
Light clamping and positioning
Holding or indexing small workpieces on jigs and fixtures, with the 157 N push at 0.5 MPa and adjustable end-of-stroke deceleration protecting delicate assemblies.
Vertical lift-and-lower stations
Raising and lowering light loads of roughly 9 kgf or less (about 0.6 of push force) on small pick-and-place units, with FA flange or LB foot mounting to suit the frame.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC20X400 the Right Cylinder?
At 20 mm bore this is the smallest MGC available, so size up if you need more force: the 25 mm bore gives 245.3 N push at 0.5 MPa and the 32 mm bore 402.2 N. If 157 N at 0.5 MPa (219.8 N at 0.7 MPa) covers your load with margin, the MGC20X400 is the right pick where its adjustable cushion matters - higher speeds or loads that would slam the covers of the bumper-style MG, which is the no-cushion alternative in this bore range. The 400 mm stroke gives a long, slender envelope, so plan rod side-load carefully: use FA flange or LB foot mounting and guide external slides rather than side-loading the 8 mm rod directly. Add the S magnet code if you need CMSG, DMSG or EMSG position sensing, and specify G or NPT thread if PT is not your plant 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) & 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 and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MGC Stainless Steel Mini Cylinder MGC20X400 FAQ
At 0.5 MPa it pushes with 157 N and pulls with 131.9 N. At 0.7 MPa those figures rise to 219.8 N push and 184.7 N pull. The theoretical maximum at 1.0 MPa is 32 kgf. For continuous duty, size the load at about 0.6 of the push force, roughly 9 kgf.
Each end cover has an adjustable cushion needle that meters the exhaust air to decelerate the piston smoothly near end of travel - it is adjustable, not a fixed bumper pad, and it only decelerates the stroke end, so use an external rod lock or pilot check valve if the load must be held on air loss. This SKU has no magnet, so no sensor can be fitted; the S code version accepts CMSG, DMSG or EMSG switches.
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