Airtac MGD Double Rod Mini Cylinder MGD40X25
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD40X25 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 MGD40X25
The AirTAC MGD40X25 is a JIS-standard round-body mini cylinder, double acting and 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 cylinder delivers an equal 527.8 N in each direction at 0.5 MPa, rising to 738.9 N at 0.7 MPa. The through-rod resists rotation and side load, keeps stroke-end position repeatable, and lets the rear rod end carry a stop flag or drive a second load while the front end does the work.
At the largest MGD bore, 40 mm, this short 25 mm stroke unit is a compact powerhouse for tight envelopes. The fixed anti-impact bumper pad decelerates the stroke end, the SUS304 stainless barrel suits damp and washdown surroundings, and the riveted round-body construction follows the JIS footprint. Operating range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, -20 to +70 C, and speeds of 30-800 mm/s. As a rule of thumb, plan on roughly 32 kg as a safe vertical load at 0.5 MPa.
Airtac MGD Double Rod Mini Cylinder MGD40X25 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD40X25 |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MGD40X25
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MGD40X25 Is Used
Anti-rotation slide
The through-rod at bore 40 resists rotation and side load, so the MGD40X25 drives a short linear slide or gripper plate straight through its 25 mm stroke without extra guides.
Twin-load push
With 527.8 N available at each rod end simultaneously at 0.5 MPa, one cylinder can press or transfer two parts at once, or hold a workpiece while the rear end signals stroke position.
Rear-mounted stop flag
The back rod end carries a stop or trigger flag for a downstream station, using the equal both-way force and repeatable stroke-end position of the double-rod design.
Is the Airtac MGD Double Rod Mini Cylinder MGD40X25 the Right Cylinder?
Within the MGD range, bore 40 is the largest and strongest: 527.8 N each way at 0.5 MPa versus 345.6 N for the 32 mm bore, so size down to MGD32 if your load is lighter and you want a smaller envelope. Choose the MGD40X25 when you need anti-rotation guidance, equal force in both directions, or a rear rod end for a flag or second load. If you need bores of 50 or 63 mm, or an adjustable variable cushion instead of the fixed bumper pad, move to the MGCD series; for a conventional single-rod cylinder, the MG series is the equivalent. Mounting is FA flange or LB foot, with I and Y rod knuckles available; there is no SDB or CB pivot option on the double-rod design. This model has no magnet, so no CMSG, DMSG or EMSG switch can be fitted; order the S code if you need position sensing. The 25 mm stroke is well inside the 500 mm maximum standard stroke for this bore, but on long strokes keep side load on the through-rod low to protect the bearings.
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 MGD40X25 FAQ
Because the rod occupies both sides of the piston, force is equal in both directions: 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), the fluid is air filtered to 40 um, temperature range is -20 to +70 C, and speed is 30-800 mm/s. The port is 1/8" and the rod thread is M14x1.5 at both ends.
The MGD40X25 has a rod exiting both covers, so it resists rotation and side load, gives identical force extending and retracting, and the rear end can carry a stop flag or drive a second load. The single-rod MG has a larger push than pull and no rear rod. Note that the fixed bumper pad only softens the stroke end: on air loss the piston drifts, so use an external rod lock or pilot check valve to hold a load. This model has no magnet, so CMSG, DMSG or EMSG switches require the optional S code.
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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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