Airtac MGC Stainless Steel Mini Cylinder MGC25X125S
The AirTAC Airtac MGC Stainless Steel Mini Cylinder MGC25X125S is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø25mm 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.
- BoreØ25 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MGC Stainless Steel Mini Cylinder MGC25X125S
The AirTAC MGC25X125S is a double acting, JIS-standard round-body mini cylinder with a 25 mm bore and 125 mm stroke, fitted 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 meter the exhaust and decelerate the piston smoothly before it reaches end of travel, so the MGC25X125S can run at higher piston speeds and move heavier loads without hammering the covers. Air pushes the piston in both directions, delivering 245.3 N push and 206.1 N pull at 0.5 MPa (72 psi).
Construction follows the MG family recipe: a SUS304 stainless barrel with covers and stainless block riveted and rolled onto it, plus a 10 mm hard-chrome plated carbon-steel rod (20 um plating) running in a two-way piston seal that also stores lubricant. Ports are 1/8", the male rod thread is M10x1.25, and the operating envelope is 0.15-1.0 MPa (22-145 psi), -20 to +70 C and 30-800 mm/s. Because the S code is in the model, a magnet is built into the piston, so CMSG, DMSG or EMSG reed switches can be clipped on for end-of-stroke signalling. 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 MGC25X125S Technical Specifications
| Model | Airtac MGC Stainless Steel Mini Cylinder MGC25X125S |
|---|---|
| Series | MGC JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 125 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MGC25X125S
| MGC | JIS round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | 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 MGC Stainless Steel Mini Cylinder MGC25X125S Is Used
High-cycle parts ejector
Pushing finished parts off a small assembly station at 30-800 mm/s: the variable air cushion absorbs the end-of-stroke shock that a bumper-only mini cylinder would transmit to the covers at speed.
Conveyor divert and stopper
Kicking or stopping lightweight cartons on a transfer line, where the adjustable cushion lets you tune deceleration so 15 kg-class loads stop cleanly instead of bouncing.
Compact clamping fixture
Clamping or positioning jigs on automated bench fixtures, with CMSG or DMSG switches on the magnet confirming extend and retract positions for the PLC.
Is the Airtac MGC Stainless Steel Mini Cylinder MGC25X125S the Right Cylinder?
At 25 mm bore the MGC25X125S gives 245.3 N push at 0.5 MPa (72 psi), about 25 kgf; as a rule of thumb keep dynamic working loads near 0.6 of that, roughly 15 kg, and for vertical lifting halve it again to about 12.5 kg. If you need more force, step up to the 32 mm bore (402.2 N push at 0.5 MPa); there is no smaller MGC than 20 mm (157.0 N). If your application runs slow and light and you do not need end-of-stroke damping, the plain bumper-type MG in the same bore is the lower-cost alternative for 20-40 mm bores. Mount the MGC25X125S with an FA flange or LB foot bracket, and add I or Y rod knuckles where the load swings. The S in the code means the magnet is already fitted for CMSG/DMSG/EMSG switches. At 125 mm the stroke is well inside the 500 mm standard limit, but on any longer stroke keep side load on the 10 mm rod minimal or guide the load externally.
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 MGC25X125S FAQ
At 0.5 MPa (72 psi) it delivers 245.3 N push and 206.1 N pull; at 0.7 MPa (101 psi) that rises to 343.4 N push and 288.5 N pull. The theoretical maximum is 50 kgf at 1.0 MPa. Keep practical working loads around 15 kg dynamic (about 0.6 of push force) and roughly 12.5 kg for vertical lifting.
The S means a piston magnet is fitted, so CMSG, DMSG or EMSG reed switches can be mounted for position signalling. The cushion itself is a variable air cushion at both ends - adjustable needle control that decelerates the piston near end of travel - whereas the plain MG uses a fixed bumper pad and cannot be tuned.
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