Airtac MGC Stainless Steel Mini Cylinder MGC20X250S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC20X250S 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 MGC20X250S
The AirTAC MGC20X250S 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 the bumper-type MG, the cushion needle is adjustable, so you can dial in smooth deceleration near end of travel and run higher piston speeds or heavier moving 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 a male M8x1.25 thread, and the air ports are M5x0.8.
Construction follows the JIS mini-cylinder footprint: a SUS304 stainless barrel with the front and back covers and stainless block riveted and rolled into place, plus a two-way piston seal that also stores lubricant. Operating pressure spans 0.15 to 1.0 MPa (22 to 145 psi) with proof pressure of 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. Because the S code is fitted, a magnet is built in and CMSG, DMSG or EMSG reed sensors can be clipped on for position feedback. 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, 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 MGC20X250S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC20X250S |
|---|---|
| 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 MGC20X250S
| 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 MGC20X250S Is Used
High-cycle pick-and-place ejector
The variable air cushion lets this 20 mm bore cylinder run fast small-part ejection at up to 800 mm/s and decelerate smoothly at both ends, protecting the covers at high cycle rates.
Light conveyor gate and diverter
With 157 N push at 0.5 MPa (about 16 kgf), the MGC20X250S pushes small packages or product off a transfer line, while the adjustable cushion stops the gate without bounce.
Compact press or indexing assist
A 219.8 N push at 0.7 MPa suits light staking, marking or indexing fixtures where smooth end-of-stroke deceleration keeps tooling from slamming home.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC20X250S the Right Cylinder?
Bore 20 is the smallest MGC size, so choose the MGC20X250S when your load is light and space is tight: 157 N push at 0.5 MPa works out to roughly 16 kgf, and a safe vertical lift figure is about 8 kg (half of that), or around 9.4 kg using the 0.6 rule of thumb on the push force. If you need more muscle in the same JIS round-body family, step up to the 25 mm bore (245.3 N push at 0.5 MPa) or 32 mm bore (402.2 N). For 20 to 40 mm bores where you do not need end-of-stroke deceleration, the plain bumper-type MG is the lower-cost alternative. The variable air cushion is the reason to pick MGC when cycle speeds climb toward the upper end of the 30 to 800 mm/s range. Order the FA flange or LB foot mounting to suit your machine, add I or Y rod knuckles if the tooling pivots, and keep the S code if you need CMSG/DMSG/EMSG sensing. The 250 mm stroke is well inside the 500 mm standard limit for this bore; non-standard strokes up to 800 mm are made to order. On long strokes, guide the load externally so the 8 mm rod does not see side loading.
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 MGC20X250S FAQ
At 0.5 MPa it pushes with 157 N and pulls with 131.9 N; at 0.7 MPa that rises to 219.8 N push and 184.7 N pull. The theoretical maximum force at 1.0 MPa is 32 kgf. For safe sizing, treat roughly 0.6 of the 0.5 MPa push force, about 9.4 kg, as a practical working load.
The cushion is an adjustable air chamber at both stroke ends: turn the needle to meter exhaust and decelerate the piston smoothly before it reaches the cover, which suits higher speeds and heavier moving loads. It decelerates only and does not lock or hold the load on air loss. Because this is the S version, a magnet is built in and CMSG, DMSG or EMSG switches can be mounted for position feedback.
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