Airtac MGC Stainless Steel Mini Cylinder MGC40X25
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC40X25 is a genuine double acting + cushion 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 + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC40X25
The AirTAC MGC40X25 is a double acting, JIS-standard round-body mini cylinder with a 40 mm bore and a short 25 mm stroke, built with a variable air cushion at both stroke ends. Unlike the bumper-type MG, this cushion is adjustable: turn the needle valve at each cover to dial in smooth deceleration of the piston near end of travel, so the cylinder tolerates higher piston speeds and heavier moving loads without hammering the covers. At 0.5 MPa it delivers 628.3 N push and 527.8 N pull, rising to 879.6 N push at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
Construction follows the MG family recipe: a SUS304 stainless barrel with covers and stainless block riveted and rolled onto it, plus a hard-chrome plated (20 um) 16 mm carbon-steel rod with a male M14x1.25 thread, and a two-way piston seal that also stores lubricant. 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 range 30-800 mm/s. Ports are 1/8". Note that the cushion only decelerates the stroke end; it is not a lock or brake, so use an external rod lock or pilot check valve if the load must be held on air loss.
Airtac MGC Stainless Steel Mini Cylinder MGC40X25 Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC40X25 |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting + 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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MGC Stainless Steel Mini Cylinder MGC40X25
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 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 MGC Stainless Steel Mini Cylinder MGC40X25 Is Used
Clamping and pressing fixtures
The 628.3 N push at 0.5 MPa (879.6 N at 0.7 MPa) suits short-stroke clamps and light press operations, with the variable air cushion absorbing the impact as the piston seats.
High-speed pusher stations
Running up to 800 mm/s, the adjustable cushion lets this 40 mm cylinder stop product pushers and diverters quickly without cover damage from repeated end-of-stroke hammering.
Compact automation modules
A 25 mm stroke with JIS round-body stainless construction fits tightly packed machine slides and ejector units where a cushioned, double acting mini cylinder is preferred.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC40X25 the Right Cylinder?
At 40 mm bore, the MGC40X25 sits in the upper-middle of the MGC range: 628.3 N push at 0.5 MPa, about 64 kgf, so a sensible safe working load is roughly 38 kg (about 0.6 of the push force), or around 32 kg for vertical lifting. If you need more force, step up to the 50 mm bore (981.3 N push at 0.5 MPa); if less, the 32 mm bore gives 402.2 N. For 20-40 mm bores there is also the plain MG with a fixed bumper pad instead of an adjustable cushion - choose MGC when your cycle speed or moving mass needs tuned deceleration. The 25 mm stroke is a standard length (bore 40 goes up to 500 mm standard, with non-standard strokes to 800 mm made to order). Mounting is FA flange or LB foot, with I and Y rod knuckles available. Add the S code if you want position sensing with CMSG, DMSG or EMSG switches; this no-S model carries no magnet and accepts no sensor. On long strokes, guide the load to keep side load off 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 MGC Stainless Steel Mini Cylinder MGC40X25 FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N; at 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure.
The cushion is an adjustable air chamber at each stroke end: a needle valve meters exhaust to decelerate the piston smoothly, which is tunable for your speed and load - it is not a fixed bumper pad. It only slows the piston near end of travel and does not lock or brake the rod, so for a held load add an external rod lock or pilot check valve.
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