Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 20mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ25 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM
Twenty millimetres of travel is all a 25 mm bore needs to deliver 245.3 N at 0.5 MPa, and the round-end CM back cover on this MAC finishes the body for compact, close-coupled installs. The rolled stainless barrel, aluminium covers and hard-chrome rod form a sealed round body that shrugs off the mist and coolant common around machine tools.
Both cushions are adjustable, so even a 20 mm stroke lands softly when the valve drives it at the top of the 30-800 mm/s range. For sizing, treat about 147 N as the continuous work force at 0.5 MPa (60 percent of the 245.3 N rating) and about 12 kg as the vertical lift with a 2:1 margin. The piston magnet comes fitted, letting CMSG, DMSG or EMSG switches signal either end of travel.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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 MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
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 MAC Stainless Steel Mini Air Cylinder MAC25X20SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM Is Used
Tooling clamp inside a CNC vise retrofit
The domed CM cover fits the tight pocket beside the jaw; 245.3 N at 0.5 MPa locks the workpiece through roughing cuts.
Kick-down pin on a small press feeder
A 20 mm pin drop locates the slide at bottom dead centre; cushioning stops the pin hammering at cycle rates approaching 800 mm/s.
Shutter over a spectrometer sample port
Stainless tube and chrome rod resist lab corridor humidity; the shutter slides just 20 mm across the port, cutting purge air loss.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM the Right Cylinder?
For a 20 mm throw, confirm the load is a short clamp or nudge - longer feeds belong on a 100 mm stroke model, and heavier gripping on the 32 mm bore at 402.2 N push (0.5 MPa), while the 20 mm bore's 157 N covers delicate parts. The CM round-end cover suits tight cavities; switch to the CA pivot eye or U flat face if the mount changes, or add FA, LB and SDB brackets. This double-acting body cannot hold a mid-stroke position when air bleeds off, so a rod lock or pilot check valve is the fix where holding matters. Rod thread M10x1.25, 1/8" ports, air filtered to 40 um.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
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 screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X20SCM FAQ
Expect 245.3 N push and 206.1 N pull at 0.5 MPa, rising to 343.4 N push and 288.5 N pull at 0.7 MPa; the theoretical maximum at 1.0 MPa is 50 kgf. Working envelope: air filtered to 40 um, 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), -20 to +70 C, 30-800 mm/s.
The rolled barrel and hard-chrome plated rod resist the splash, washdown and humidity that blister painted mini cylinders, while the variable air cushion at both ends lets you tune impact out of even a 20 mm stroke. Magnetic position feedback via CMSG, DMSG or EMSG switches is ready to fit because the piston magnet is included on every MAC.
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