Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 550mm 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
- Stroke550 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 MAC20X550SCM
Riveted aluminium covers roll the stainless barrel into one sealed body on this MAC20X550SCM, keeping the 20 mm bore cylinder tight through damp shifts and light washdown. Double acting by design, it pushes 157 N and pulls 131.9 N at 0.5 MPa, with a variable air cushion at both ends so faster strokes do not hammer the covers. The CM round-end back cover accepts a clevis-style pivot pin without added hardware, and the standard magnet lets CMSG, DMSG or EMSG switches report position.
The 550 mm stroke exceeds the 500 mm standard for this bore and is therefore built to order. For sizing, the raw 0.5 MPa push equals about 16 kg against gravity - treat the rod as lifting roughly 8 kg vertically if you want a 2:1 margin on real part weights. Operating pressure spans 0.15-1.0 MPa (22-145 psi) and speed runs from 30 to 800 mm/s.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 550 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 MAC20X550SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×550 | 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 MAC20X550SCM Is Used
Vertical gate lift on a paint line
Raises a lightweight interlock gate 550 mm between conveyor sections; cushioned stops keep the gate from slamming its frame at every cycle.
Case diverter on a sortation spur
Kicks cartons onto a side lane; the round-end cover mounts on a pivot pin and the magnet feeds a DMSG switch for diverter confirmation.
Door opener on a CNC enclosure
Swings a full-height enclosure door open across the 550 mm stroke; cushioning eases it to the stop and a CMSG switch confirms the open state.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SCM the Right Cylinder?
Compare bores on the same 0.5 MPa basis: the 16 mm MAC gives 100.5 N, this 20 mm gives 157 N, and the 25 mm gives 245.3 N - pick the smallest that covers your job with margin. Once air is vented the piston free-drifts, so a pilot check valve or rod lock is the answer for held loads, not the cushion. The CM round-end cover swings on a pin while FA flange, LB foot and SDB pivot brackets anchor the body. With 550 mm of stroke, guide the load in its own bearings; the 8 mm rod is not meant to take side thrust.
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 MAC20X550SCM FAQ
Push at 0.5 MPa is 157 N and pull is 131.9 N; at 0.7 MPa push reaches 219.8 N. The bore's theoretical ceiling is about 32 kgf at 1.0 MPa. The port is 1/8", the rod 8 mm, and the male rod thread M8x1.25.
The barrel is stainless steel and the 8 mm rod is hard-chrome plated carbon steel, so the cylinder stands up to humidity, splashes and wipe-down cleaning where painted mini bodies would corrode. Variable cushion screws at both ends let you soften landings at speeds up to 800 mm/s.
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