Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S
The AirTAC Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S is a genuine double acting, double rod + 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, double rod + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S
The MGCD20X250S is a JIS-standard round-body mini cylinder, double acting, with a rod exiting BOTH covers on the same M8x1.25 male thread. Because both sides of the piston see the rod-side area, the output force is equal in both directions: about 131.9 N each way at 0.5 MPa and 184.7 N each way at 0.7 MPa, with a theoretical maximum of 26.9 kgf at 1.0 MPa. The S code means a magnet is fitted, so CMSG, DMSG or EMSG reed switches can be clipped on for end-of-stroke signalling over the full 250 mm travel.
What sets this build apart is the variable air cushion at both ends: an adjustable orifice decelerates the piston smoothly before each cover, so the 20 mm bore can run faster or carry heavier inertia than an uncushioned mini cylinder without hard metal stops. The through-rod also gives natural anti-rotation plus a free rear rod end for a stop flag, switch cam or second small load. Construction follows the JIS MG family: a riveted SUS304 stainless barrel, a hard-chrome plated 8 mm rod, and a two-way lubricant-storing piston seal. At 0.5 MPa the realistic working load is about 0.6 of the 131.9 N force, roughly 79 N, which is about 8 kg horizontally; for a vertical lift, halve the 13.4 kgf theoretical figure to about 6.7 kg.
Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S Technical Specifications
| Model | Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S |
|---|---|
| Series | MGCD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MGCD20X250S
| MGCD | JIS round-body mini cylinder (double-rod, 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 MGCD Stainless Steel Mini Air Cylinder MGCD20X250S Is Used
High-speed anti-rotation transfer
The through-rod keeps the load from twisting while the variable air cushion at each end lets a light 20 mm pusher cycle faster than an uncushioned mini cylinder, absorbing the stop at both ends of the 250 mm stroke.
Twin-load press with soft stop
Rod ends on both covers carry two small pads or a part and an anvil, pressing with about 131.9 N each way at 0.5 MPa, while the adjustable cushions give a gentle landing instead of a bang.
Rear-switch slide with position feedback
The rear rod end drives a cam or flag past CMSG or DMSG switches, turning the cushioned double-rod cylinder into a compact slide with end-of-stroke confirmation on both directions.
Is the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X250S the Right Cylinder?
Size by force, not bore: at this 20 mm class you get 131.9 N each way at 0.5 MPa, the smallest in the MGCD range, so step up to 25 or 32 mm if your load needs more. If you want a double-rod cylinder without cushioning in this bore range, the MGD with fixed bumpers is the alternative; for a single rod with a cushion, choose the MGC. This MGCD is the right pick when you need smooth adjustable deceleration at both ends, equal force in both directions, and a rear rod end for a stop or flag. Mounting is LB foot or FA flange, with I and Y rod knuckles available; CB and SDB are not offered. The fitted magnet supports CMSG, DMSG or EMSG switches. The 250 mm stroke is within the 300 mm maximum standard stroke for this bore, but keep side loads off the long 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 MGCD Stainless Steel Mini Air Cylinder MGCD20X250S FAQ
Because both sides of the piston are rod-side area, the force is equal both ways: 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, speed range is 30-800 mm/s, and the fluid is air filtered to 40 um. Ports are M5x0.8 and the rod thread is M8x1.25 on both ends.
The cushion is an adjustable air restriction at each end that decelerates the piston smoothly before it reaches the cover, so you can tune the stop for higher speeds or heavier inertia; it is a brake for the last part of the stroke, not a lock, so the load is not held on air loss and an external rod lock or pilot check valve is recommended for holding. Unlike the MGD, which is a double-rod cylinder with fixed bumper pads, the MGCD has a variable air cushion; unlike the MGC, which is single-rod, the MGCD rod exits both covers for equal force both ways and anti-rotation. The fitted magnet accepts CMSG, DMSG or EMSG switches.
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