Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S
The AirTAC Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S is a genuine double acting, double rod + 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, double rod + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S
The AirTAC MGCD20X400S is a double acting, double-rod JIS round-body mini cylinder with a 20 mm bore and a 400 mm stroke, built with a variable air cushion at both ends. Because a rod exits both covers with the same M8x1.25 male thread, the piston works on the rod-side area in each direction, 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 the 400 mm travel, which suits higher speeds and heavier inertia loads than an un-cushioned mini cylinder can handle.
The barrel is SUS304 stainless with a hard-chrome plated rod, and the riveted round-body construction follows the JIS mini-cylinder footprint. The fitted magnet (the S code) allows CMSG, DMSG or EMSG switches to be mounted along the barrel for end-of-stroke signalling. As a computed buyer insight, applying the usual 0.6 working-load rule to the 131.9 N force at 0.5 MPa gives a safe horizontal load of about 8 kg, or a safe vertical load of about 6.7 kg. Note that the 400 mm stroke exceeds the 300 mm maximum standard stroke for this bore, so this model is made to order.
Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S Technical Specifications
| Model | Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S |
|---|---|
| Series | MGCD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 400 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 MGCD20X400S
| MGCD | JIS round-body mini cylinder (double-rod, 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 MGCD Stainless Steel Mini Air Cylinder MGCD20X400S Is Used
High-speed anti-rotation transfer
The through-rod resists rotation while the variable air cushion brings the 400 mm stroke to a smooth stop at speed, moving small parts between stations with about 8 kg of safe horizontal load at 0.5 MPa.
Twin-load press with soft stop
Rod ends on both covers let this cylinder carry a light pressing or marking load on each side, with the adjustable cushion absorbing the impact at each end for a gentle, repeatable finish.
Rear-switch long slide
The magnet and rear rod end support CMSG or DMSG switch positioning and a stop flag along the barrel, giving position feedback on a long 400 mm travel slide or gate.
Is the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD20X400S the Right Cylinder?
Size the MGCD by the equal both-way force you need: this 20 mm bore delivers 131.9 N per direction at 0.5 MPa, the smallest in the MGCD range, which runs up to 1400.9 N at 63 mm bore. If you need a double-rod mini cylinder at this size without speed control at the ends, the MGD with fixed bumpers covers bores 20 to 40; if you want a single rod with a cushion, choose the MGC instead. Pick the MGCD when you need smooth adjustable deceleration at both ends, anti-rotation guidance from the through-rod, or a rear rod end for a stop flag, second load or position marker. Mounting is FA flange or LB foot, with I and Y rod knuckles available; there is no CB or SDB option. The fitted magnet supports CMSG, DMSG and EMSG switches. At 400 mm this is a non-standard stroke above the 300 mm standard maximum for bore 20, so expect a made-to-order lead time, and support long strokes carefully against 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 MGCD20X400S FAQ
Because both sides of the piston see the rod-side area, 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, speed range is 30-800 mm/s, and the fluid is air filtered to 40 um. The port is M5x0.8 and the rod thread is M8x1.25 on both ends.
The cushion at each end is an adjustable air cushion that decelerates the piston near the end of the stroke, so you can tune the stopping for higher speeds or heavier loads; it is not a lock, so an external rod lock or pilot check valve is needed to hold a load on air loss. Unlike the MGD, which is a double-rod cylinder with fixed bumper pads, the MGCD has adjustable cushions. Unlike the MGC, which is single-rod, the MGCD has a rod at both ends for equal force both ways and anti-rotation. The fitted magnet allows CMSG, DMSG or EMSG switches.
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