Airtac MGD Double Rod Mini Cylinder MGD40X125
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD40X125 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM14×1.5
- CushionFixed anti-impact bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MGD Double Rod Mini Cylinder MGD40X125
The AirTAC MGD40X125 is a JIS-standard round-body mini cylinder that is double acting with a double rod: a 16 mm hard-chrome rod exits both the front and back covers with the same M14x1.5 male thread at each end. Because the rod-side area is active on both sides of the piston, the output force is equal in both directions, about 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The through-rod resists rotation and side load, keeps stroke-end position repeatable, and leaves the back rod end free to carry a stop flag or drive a second load. A fixed anti-impact bumper pad softens each stroke end.
Construction suits damp and washdown environments: a SUS304 stainless barrel, riveted covers, and hard-chrome plated rods, with a two-way lubricant-storing piston seal. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, speed range 30-800 mm/s, and temperature from -20 to +70 C on air filtered to 40 um. At a realistic working load of roughly 0.6 of the 527.8 N force, plan on about 320 N, or around 32 kg for a vertical lift. Ports are 1/8" on this bore, and mounting is FA flange or LB foot with I and Y rod knuckles.
Airtac MGD Double Rod Mini Cylinder MGD40X125 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD40X125 |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod |
| 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 | Fixed anti-impact bumper pads |
| 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 MGD Double Rod Mini Cylinder MGD40X125
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 40 | 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 MGD Double Rod Mini Cylinder MGD40X125 Is Used
Anti-rotation push slide
The through-rod resists rotation so a 527.8 N push-pull slide moves parts straight without guides, with the fixed bumper pad decelerating each end of the 125 mm travel.
Twin-load transfer
Both rod ends drive two grippers or two part nests at once with equal 738.9 N force at 0.7 MPa, keeping symmetric transfer stations balanced stroke after stroke.
Rear-mounted stop flag
The back rod end carries a stop or position flag for downstream logic; add the S code variant to mount CMSG, DMSG or EMSG switches along the barrel.
Is the Airtac MGD Double Rod Mini Cylinder MGD40X125 the Right Cylinder?
At 40 mm bore this is the largest MGD, delivering 527.8 N each way at 0.5 MPa; step down to the 32 mm bore (345.6 N) if your load is lighter, or to 25 mm (206.1 N) for compact duty. If you need a 50 or 63 mm bore or an adjustable cushion instead of the fixed bumper pad, move to the MGCD; for a single-rod cylinder, the MG is the equivalent. Choose the MGD40X125 when you need anti-rotation guidance, equal force in both directions, or a rear rod end for a switch flag or second load. The 125 mm stroke sits well inside the 500 mm maximum standard stroke for this bore. Add the S code if you want CMSG, DMSG or EMSG switch mounting; this non-S unit carries no magnet. For long strokes or side loads, support the rod externally, and remember the cylinder will not hold a load on air loss, so fit an external rod lock or pilot check valve where needed.
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/impact settings and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MGD Double Rod Mini Cylinder MGD40X125 FAQ
Because the rod-side area works in both directions, output is equal each way: 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 is 1.5 MPa (215 psi), speed is 30-800 mm/s, temperature is -20 to +70 C on air filtered to 40 um, and ports are 1/8". The maximum standard stroke for this 40 mm bore is 500 mm.
The MGD has a rod exiting both covers with the same M14x1.5 thread, so force is equal both ways and the through-rod resists rotation and side load; the single-rod MG has a larger extend force but a smaller return force. The bumper pad here is a fixed anti-impact pad, not an adjustable cushion, and the cylinder will not hold a load on air loss, so use an external rod lock or pilot check valve for held loads. This non-S model has no magnet, so no sensor can be mounted; order the S code to enable CMSG, DMSG or EMSG switches.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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