Airtac MGC Stainless Steel Mini Cylinder MGC20X250
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC20X250 is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 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 MGC20X250
The AirTAC MGC20X250 is a double acting, JIS-standard round-body mini cylinder with a 20 mm bore and 250 mm stroke, fitted with a variable air cushion at both stroke ends. Unlike a fixed bumper pad, the adjustable cushion needle lets you dial in smooth deceleration near end of travel, so this 20 mm bore can run at higher piston speeds and 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. The 8 mm hard-chrome plated rod carries an M8x1.25 male thread, and the air ports are M5x0.8.
Construction follows the JIS mini-cylinder footprint: an SUS304 stainless barrel with the front and rear covers and stainless block riveted and rolled into place, plus a two-way piston seal that also stores lubricant. Operating pressure is 0.15 to 1.0 MPa (22 to 145 psi), proof pressure 1.5 MPa (215 psi), temperature range -20 to +70 C, and speed range 30 to 800 mm/s on air filtered to 40 um. Mounting is via FA flange or LB foot, with I and Y rod knuckles available. Note that the cushion only decelerates the stroke end; it is not a lock or brake, 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 MGC20X250 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC20X250 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MGC20X250
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MGC20X250 Is Used
Small-parts ejector on assembly fixtures
The variable air cushion lets the 20 mm bore eject lightweight parts at speed and settle gently against the fixture, protecting the covers during fast, repetitive cycles.
Conveyor line divert pusher
With 157 N push at 0.5 MPa, the MGC20X250 nudges small cartons or totes off a transfer line, and the adjustable cushion absorbs the stop so the part is not thrown.
Slide clamping and positioning
Mounted with an LB foot or FA flange on a compact slide, the cylinder positions jigs with smooth end-of-stroke deceleration, and the -S option adds CMSG or DMSG position sensing.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC20X250 the Right Cylinder?
Bore 20 is the smallest MGC size, so choose the MGC20X250 when space and force demand are modest but you still want adjustable end-of-stroke deceleration; if you do not need the cushion, the plain bumper-type MG in 20 mm bore is the alternative. For more force step up to the 25 mm bore (245.3 N push at 0.5 MPa) or the 32 mm bore (402.2 N). A practical rule of thumb: take about 0.6 of the 157 N push force, roughly 9.6 kgf, as the safe working load for horizontal moves, and halve it to around 4.8 kg for vertical lifting. The 250 mm stroke is within the 500 mm maximum standard stroke for this bore, so it ships as a standard part. Add the S code if you want a magnet for CMSG, DMSG or EMSG switches; this SKU has no magnet, so no sensor can be mounted. At 250 mm of stroke, keep side loads off the 8 mm rod and guide the load externally.
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 MGC20X250 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 force of the 20 mm bore is 32 kgf at 1.0 MPa. For safe sizing, work with roughly 0.6 of the push force, about 9.6 kgf, and halve that for vertical lifts.
The cushion needle at each end throttles the exhaust air to decelerate the piston smoothly near end of travel, so you can tune the braking to suit speed and load; it is adjustable, not a fixed pad. It only brakes the stroke end, however, and the MGC20X250 does not lock or hold position on air loss, so fit an external rod lock or pilot check valve for a held load.
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