Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 25mm 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.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU
Flat-end U covers let the MAC20X25SU bolt flush against a machine plate, making this 20 mm bore a clean flush-mount pusher rated at 157.0 N push and 131.9 N pull at 0.5 MPa (72.5 psi). Stroke is driven by air both ways - double acting - with a variable cushion trimming the landing at each end of its 30-800 mm/s travel.
In theory the bore tops out near 32.0 kgf at full 1.0 MPa pressure; halving the 0.5 MPa push gives a vertical lift figure of about 8 kg, an honest yardstick when matching part weights. The stainless barrel also resists the rust that eats painted mini cylinders in wet or outdoor corners, and the integral magnet means DMSG, EMSG or CMSG sensors detect rod position with no special-order piston.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MAC20X25SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 MAC20X25SU Is Used
Fixture stop block
Flush against a fixture plate, the flat U end acts as a positive stop; 157 N of push at 0.5 MPa seats parts against it with a solid, cushioned landing.
Cable spool guide
The rod tows a guide pulley across a rewinding spool; about 8 kg of vertical lift equivalent means typical cable tension is well within range.
Tote stop on a gravity lane
At the foot of a gravity roller lane the cylinder pops up to catch totes; the 1/8" port and 25 mm stroke keep the cycle quick and compact.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X25SU the Right Cylinder?
The force ladder runs 100.5 N (bore 16), 157.0 N (bore 20) and 245.3 N (bore 25) at 0.5 MPa - match the middle rung to your load with room to spare. The flat U end cover bolts directly to a machine face and mates with common rod knuckles; FA, LB and SDB options adapt it to flanged or pivoted frames. Because a MAC cannot hold its own against a dropped supply, spec a rod lock for clamps that must stay closed. Ports are 1/8" with M8x1.25 male rod thread, and strokes up to 500 mm are standard catalog items.
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 MAC20X25SU FAQ
At 0.5 MPa the bore delivers 157.0 N push and 131.9 N pull; at 0.7 MPa it delivers 219.8 N and 184.7 N, and the theoretical limit is 32.0 kgf at 1.0 MPa. Supply range is 0.15-1.0 MPa (22-145 psi), proof is 1.5 MPa (215 psi), the port size is 1/8", and the 8 mm rod carries an M8x1.25 male thread.
Yes - the rolled stainless-steel tube plus the hard-chrome plated rod shrug off splashes, humidity and occasional hose-down that rust painted-steel minis. That makes the MAC20X25SU a sensible pick near wash stations, coolant machines and outdoor gates. Air should be filtered to 40 um and kept within -20 to +70 C for long seal life.
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