Airtac MAC Stainless Steel Mini Air Cylinder MAC20X170SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X170SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 170mm 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
- Stroke170 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 MAC20X170SU
Need a fixed-mount mini cylinder that still cushions both ends? The MAC20X170SU pairs a 170 mm stroke with a U flat-end back cover, so the barrel bolts flat against a machine plate without a separate bracket. It is double acting - air extends and retracts the 8 mm rod - and delivers 157 N of push at 0.5 MPa over a 0.15-1.0 MPa (22-145 psi) supply.
Inside, the stainless-steel tube and aluminium covers are rolled and riveted into one sealed round body, and the rod's 20 um hard-chrome plating stands up to splash and humidity. Two needle screws tune the variable air cushion at each end, the magnet ships as standard so a CMSG or EMSG switch reads end positions straight away, and a 2:1 margin still leaves about 8 kg of vertical lift per cylinder.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X170SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X170SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 170 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 MAC20X170SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×170 | 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 MAC20X170SU Is Used
Small-parts ejector on a press bench
Kicking stamped shims off a bench die - 157 N clears the part cleanly and the flat U cover keeps the barrel rigid against the press frame with no bracket to flex.
Bench guard door slide
A sliding polycarbonate guard on a compact machining bench - the flat back cover bolts flush to the frame and the air cushion stops the door without a bang.
Sample elevator in a dip-coating rig
Lifting coupon samples into a coating tank - the stainless barrel tolerates solvent splashes, the magnet trips a DMSG switch at top of stroke, and the margin leaves about 8 kg of vertical lift.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X170SU the Right Cylinder?
A bore 16 unit manages 100.5 N at 0.5 MPa and a bore 25 unit 245.3 N, so the 20 mm bore sits squarely in the light-to-medium band for sliding gates and small fixtures. Do not expect the cylinder to hold position on lost air - the piston drifts once the valve centres - so add a rod lock or pilot check valve for hanging loads. With the flat U end you bolt straight to a plate; FA flange, LB foot and SDB pivot brackets are available if the layout changes, and I or Y rod knuckles suit link mechanisms. Porting is 1/8" on this bore, and the long 170 mm stroke on the 8 mm rod deserves external guiding to keep side loads away.
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 MAC20X170SU FAQ
Use 157 N push and 131.9 N pull at 0.5 MPa, or 219.8 N push and 184.7 N pull at 0.7 MPa. The theoretical ceiling is 32 kgf at 1.0 MPa. Keep a working margin on top of these numbers, since friction and back pressure eat into them in real plumbing.
The flat back face seats directly against a machined plate, so the cylinder lines up without shims or brackets. If a section later needs a pivoting mount, swap to CA or CM covers or add an SDB pivot bracket - bore, stroke and port layout stay the same.
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