Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S
The AirTAC Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S is a genuine double acting, double rod + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S
The MGCD20X125S is a double acting, double-rod JIS mini cylinder with a 20 mm bore and 125 mm stroke, built with a variable air cushion at both ends. Because a rod exits each cover with the same M8x1.25 male thread, the rod-side area is effective in both directions, so the output force is equal both ways: about 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa, with a theoretical maximum of 26.9 kgf at 1.0 MPa. The adjustable cushion decelerates the piston smoothly at each end of travel, making this bore suitable for higher speeds or heavier moving loads than an un-cushioned mini cylinder can stop cleanly. The fitted magnet (S code) allows CMSG, DMSG or EMSG switches to be mounted for end-of-stroke detection.
Construction follows the JIS round-body mini format: a riveted SUS304 stainless barrel with hard-chrome plated rods for wear resistance, and a two-way lubricant-storing piston seal. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), tolerates a proof pressure of 1.5 MPa (215 psi), operates from -20 to +70 C, and covers speeds of 30-800 mm/s. As a practical sizing guide, apply roughly 0.6 of the push force for a realistic working load, which gives a safe vertical figure of about 8 kg for this cylinder. Ports are M5x0.8, and the maximum standard stroke for this bore is 300 mm.
Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S Technical Specifications
| Model | Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S |
|---|---|
| Series | MGCD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod + 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 300 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
Model Code: Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S
| MGCD | JIS round-body mini cylinder (double-rod, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MGCD Stainless Steel Mini Air Cylinder MGCD20X125S Is Used
High-speed anti-rotation transfer
The through-rod resists rotation while the variable air cushion at both ends absorbs the energy of fast 30-800 mm/s moves, keeping small pick-and-place parts aligned without external damping.
Twin-load press with soft stop
With 131.9 N each way at 0.5 MPa, the two rod ends can carry matching pads for light pressing or marking, and the adjustable cushion gives a smooth, non-shock stop at the bottom of the stroke.
Rear-switch reciprocating slide
The rear rod end carries a cam or flag past a CMSG or DMSG switch, giving position feedback on a 125 mm stroke while the cushion protects the cover at each reversal.
Is the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X125S the Right Cylinder?
Size the MGCD series by the equal both-way force you need: bore 20 is the smallest at 131.9 N each way at 0.5 MPa, stepping up through bores 25, 32, 40, 50 and 63. If you need a double-rod cylinder at this size without cushioning (fixed bumper instead), look at the MGD; if you want a single rod with a cushion, the MGC is the equivalent. Choose the MGCD20X125S when you need smooth, adjustable deceleration at both stroke ends, anti-rotation from the through-rod, or a rear rod end for a stop flag or second load. Mounting options are LB foot or FA flange, with I and Y rod knuckles available (no CB or SDB). The fitted magnet supports CMSG, DMSG or EMSG switch mounting. For long strokes, support the rod to limit side load.
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 MGCD Stainless Steel Mini Air Cylinder MGCD20X125S FAQ
Because it is a double-rod cylinder, the force is equal in both directions: 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa, with a theoretical maximum of 26.9 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure is 1.5 MPa (215 psi), temperature range is -20 to +70 C, and speed is 30-800 mm/s on air filtered to 40 um.
The cushion is an adjustable air cushion at both ends that decelerates the piston near each stroke end for smooth stops; it is not a lock, so use an external rod lock or pilot check valve to hold a load on air loss. Unlike the MGD, which uses fixed bumper pads, the MGCD has this adjustable cushion, and unlike the single-rod MGC it has a rod at both ends, giving equal force both ways and anti-rotation. The fitted magnet allows CMSG, DMSG or EMSG switches.
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