Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 420mm 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
- Stroke420 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 MAC20X420SCM
The MAC20X420SCM stretches the 20 mm mini format to a 420 mm stroke inside a stainless-steel round barrel that is rolled and riveted onto aluminium covers, a construction that takes washdown and outdoor damp far better than painted-steel minis. It is double acting - compressed air drives the rod out and pulls it back - and a variable air cushion at both ends, set with the needle screws, absorbs end-of-stroke shock so you can run faster or carry more without hammering the caps.
At 0.5 MPa this bore pushes 157 N and pulls 132 N, which works out to about 94 N of realistic working force; for lifting, the same 157 N is roughly 16 kgf, so with a 2:1 margin it hoists about 8 kg vertically. The magnet comes built in as standard, letting CMSG, DMSG or EMSG switches ride the full travel, and speed spans 30-800 mm/s.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 420 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 MAC20X420SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×420 | 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 MAC20X420SCM Is Used
Reject-lane diverter on a carton line
A 420 mm stroke sweeps light cartons sideways into a reject chute; 157 N at 0.5 MPa moves them easily and the end cushions keep the gate from slamming its stops.
Rinse-bay inspection cover lift
In a dairy washdown zone the stainless barrel and hard-chrome rod resist the moisture that corrodes painted minis; about 8 kg of lid weight lifts with margin to spare.
Dust-hopper slide gate pusher
Opens and closes a dry-powder discharge gate on a dust collector, with roughly 94 N of usable push and CMSG switch signals confirming each end position.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCM the Right Cylinder?
If 157 N at 0.5 MPa overshoots your load, the 16 mm bore (100.5 N) saves air; if it falls short, the 25 mm bore delivers 245.3 N in the same body style. The CM round-end back cover gives a clean fixed through-mount, with FA flange or LB foot brackets available for frame building. Mind that a plain MAC neither locks nor holds its stroke - cut the air and the 8 mm rod drifts with the load, so add a pilot check valve or rod lock where position must stay. And at 420 mm of extension, mount the load on an external guide; side thrust this far out will bend the slim rod.
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 MAC20X420SCM FAQ
At 0.5 MPa the 20 mm bore pushes 157 N and pulls 132 N; at 0.7 MPa push reaches 220 N and pull 185 N, with a theoretical peak of 32 kgf at 1.0 MPa. Working pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, and the port is 1/8 in.
Back both needle screws fully out before the first stroke, then close them gradually until the end-of-stroke impact disappears; this variable air cushion works at each end and is what lets the cylinder run heavy or fast without damaging the aluminium covers.
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Covers non-human-caused product damage.
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