Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 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 MAC20X40SCM
Double-acting air does the work in both directions on the MAC20X40SCM: 157 N out and 131.9 N back at 0.5 MPa, rising to 219.8 N at 0.7 MPa, all from a 20 mm bore with a variable cushion tuned at each end. The CM round-end back cover suits frames that already carry a fixed pin, so the body swings on what the machine has rather than on added brackets.
The rolled stainless body stands up to condensation and damp shops where painted minis start to flake, and the two-way piston seal stores its own grease for longer service. Treat about 94 N - 60 percent of the rating - as the realistic working force at 0.5 MPa and the cylinder will not labour mid-stroke. A magnet is already fitted in the piston, so DMSG or CMSG switches drop straight on with no special order.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MAC20X40SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MAC20X40SCM Is Used
Label head press
Presses self-adhesive labels onto jars at around 94 N working force, with the cushion preventing a hard slap against the glass shoulder.
Hopper slide gate
Opens and closes a small slide gate under a pellet hopper, the CM round end pinning straight into the gate linkage already in the frame.
Presence check pusher
Nudges parts past a photo-eye for presence checks on an assembly line, with DMSG switches confirming the rod is fully home each cycle.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCM the Right Cylinder?
Bore 20 sits mid-pack: the 16 mm MAC manages 100.5 N at 0.5 MPa while the 25 mm reaches 245.3 N, so let the load decide. A plain MAC of this type will not hold its rod against a hanging or spring load once air is removed - a pilot check valve or rod lock covers that case. Pin the CM round end to existing frame hardware, or choose FA flange, LB foot or SDB pivot brackets if a static mount fits better. Air feeds through 1/8" ports; the 40 mm stroke is a standard catalogue option.
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 MAC20X40SCM FAQ
Push 157 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; 32 kgf theoretical peak at 1.0 MPa. Run it anywhere in 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi) and speeds from 30-800 mm/s.
Wherever splashes, condensation or routine cleaning are part of the job, yes. The stainless barrel plus a hard-chrome plated rod (20 um plating) shrug off mild corrosion and washdown that would blister painted-steel or plain aluminium bodies, keeping the bore smooth for seal life.
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Covers non-human-caused product damage.
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