Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S
The AirTAC Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S is a genuine double acting, double rod + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, double rod + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S
The AirTAC MGCD40X250S is a double acting, double-rod JIS round-body mini cylinder with a 40 mm bore and 250 mm stroke, fitted with a variable air cushion at both ends. Because a rod exits both covers, both strokes work on the rod-side area, so the output force is equal in each direction: about 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa, with a theoretical maximum of 107.6 kgf at 1.0 MPa. The adjustable cushion decelerates the piston smoothly at each end, allowing higher speeds and heavier loads than an uncontrolled stop, while the through-rod resists rotation and leaves a rear rod end free for a stop flag or a second load.
Construction follows the JIS mini-cylinder footprint with a SUS304 stainless barrel, a hard-chrome plated 16 mm rod (male M14x1.5 thread on both ends) and riveted covers with a two-way lubricant-storing piston seal. Air supply should be filtered to 40 um; operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature range -20 to +70 C and speed 30-800 mm/s. This -S variant carries a magnet, so CMSG, DMSG or EMSG switches can be clipped on for end-of-stroke detection. As a buyer insight, applying the usual 0.6 working-load rule to the 0.5 MPa force gives a safe vertical load of roughly 27 kg.
Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S Technical Specifications
| Model | Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S |
|---|---|
| Series | MGCD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, double rod + cushion |
| Port size | 1/8" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 MGCD40X250S
| MGCD | JIS round-body mini cylinder (double-rod, variable cushion). |
|---|---|
| 40 | 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 MGCD40X250S Is Used
High-speed anti-rotation transfer
The through-rod keeps the toolplate from twisting while the variable air cushion absorbs the stop at 250 mm travel, letting the slide run near the top of the 30-800 mm/s range.
Twin-load press with soft stop
Both rod ends carry workpieces, and the adjustable cushion gives a controlled deceleration into the dies; equal 527.8 N force in each direction keeps the cycle identical on the return stroke.
Rear-switch slide
The rear rod end drives a flag past CMSG/DMSG/EMSG switches (magnet fitted on this -S model), giving position feedback without extra brackets on the main stroke.
Is the Airtac MGCD Stainless Steel Mini Air Cylinder MGCD40X250S the Right Cylinder?
Size the MGCD40X250S when you need equal force both ways with cushioned stops: at 527.8 N per direction it sits mid-range, above the 20/25/32 bores and below the 50/63. If you need a double-rod cylinder at 20-40 mm bore with a fixed bumper instead of an adjustable cushion, choose the MGD; for a single rod with a variable cushion, choose the MGC. The 250 mm stroke is within the 500 mm maximum standard stroke for this bore. Mount with the FA flange or LB foot, and add I or Y rod knuckles for off-axis loads; SDB and CB mounts are not offered. The fitted magnet (-S) enables CMSG/DMSG/EMSG position switches. For long strokes or side loads, guide the load externally rather than cantilevering it on the rod.
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 MGCD40X250S FAQ
Because the double-rod design works on the rod-side area both ways, output is equal in each direction: 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa, with a theoretical maximum of 107.6 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-800 mm/s, and the air must be filtered to 40 um.
The MGCD40X250S has a variable air cushion at both ends: an adjustable air throttle that decelerates the piston near each end for smooth high-speed stops. It is not a fixed bumper pad (that is the MGD) and not a lock, so the cylinder will not hold its load on air loss; use an external rod lock or pilot check valve. Unlike the single-rod MGC, the MGCD has a rod at both covers, giving equal force both directions and a rear rod end for a stop flag or second load. The fitted magnet also accepts CMSG/DMSG/EMSG switches.
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