Airtac MAC Stainless Steel Mini Air Cylinder MAC20X250SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X250SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 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 MAC20X250SU
The U back cover on this MAC20X250SU finishes the barrel in a flat face, letting the cylinder sit hard against a plate or frame with only a through-hole needed. Inside it is the proven round-body build: stainless-steel barrel, hard-chrome plated 8 mm carbon-steel rod, aluminium covers rolled onto the tube. Double acting, with a variable air cushion at each end to soften a full 250 mm of travel; push is 157 N at 0.5 MPa.
At 0.7 MPa push lifts to 219.8 N, while pull at 0.5 MPa is 131.9 N. As a rule of thumb, size the job for about 94 N of continuous work at 0.5 MPa, which comfortably drags a sliding fixture or closes a long gate latch. The stainless tube and chrome rod tolerate damp, dusty or outdoor air better than painted minis, and the magnet fitted as standard accepts DMSG or CMSG switches anywhere along the 250 mm barrel - handy for mid-stroke proofing.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X250SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X250SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MAC20X250SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MAC20X250SU Is Used
Sliding gate latch
Drives a latch bar across a 250 mm gate opening on an outdoor conveyor enclosure; the stainless barrel handles rain and dust without paint flaking.
Film web tensioner
Keeps light tension on a film web in a wrapping machine, cushioning each direction change at the end of the 250 mm travel.
Fixture clamp-and-prove
Clamps a welding jig, then a DMSG switch on the standard magnet confirms clamp position before the weld timer starts.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X250SU the Right Cylinder?
Between bores: 16 mm gives 100.5 N at 0.5 MPa and 25 mm gives 245.3 N - step up if the 94 N working figure leaves too little margin. 250 mm is a standard stroke for this bore (max 500 mm), but long unsupported strokes punish side loads, so guide the load externally rather than leaning on the rod. When air is off the rod simply drifts, so specify a rod lock or pilot check valve if the machine must hold position. FA flange, LB foot or SDB pivot brackets pair with the flat U face when the frame needs more than a bolt-through.
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 MAC20X250SU FAQ
Push at 0.5 MPa is 157.0 N and pull is 131.9 N; at 0.7 MPa push reaches 219.8 N. The bore is rated to a theoretical 32.0 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s, with a 1.5 MPa (215 psi) proof rating.
It gives a flat machined face at the rear, so the cylinder bolts flush against a plate with no saddle or bracket - the cleanest option on long strokes. Cushioning is unaffected: the variable air cushion still works at both ends via the needle screws, which should be backed off and opened gradually on first run.
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Covers non-human-caused product damage.
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