Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 20mm 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.
- BoreØ40 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA
Short strokes do not have to mean small forces: in just 20 mm of travel the MAC40X20SCA still develops 628 N of push and 528 N of pull at 0.5 MPa (72.5 psi), and 880 N at 0.7 MPa (101.5 psi). The 40 mm AirTAC bore is double acting with a variable air cushion at each end, so even a 20 mm landing is damped, not hammered.
Construction is the classic round mini: a riveted stainless-steel barrel, aluminium-alloy covers and a 16 mm hard-chrome rod that tolerates washdown and damp sheds. Derate for real duty and you get about 377 N of usable push at 0.5 MPa - call it a 32 kg vertical lift with a 2:1 margin. The piston magnet is fitted as standard, letting CMSG, DMSG or EMSG switches report the extended and retracted ends immediately.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MAC40X20SCA
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MAC40X20SCA Is Used
Weld-fixture locating pin
Snapping a locating pin in and out of a car-panel weld jig in 20 mm, with 628 N holding the panel square against the nest.
Carton flap tucker
Tucking the last flap on a small carton at the end of a packaging line - the 20 mm throw matches the flap travel exactly.
Part-present kicker
Kicking a stray part off an assembly dial plate so the sensor cycle can restart, with a CMSG switch confirming rod position.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCA the Right Cylinder?
This size trades reach for compactness: if 20 mm is too little, the same CA pivot cover comes on any stroke up to 500 mm standard; if 628 N is too much, the 25 mm bore drops to 245 N at 0.5 MPa while the 50 mm bore climbs to 981 N. Air ports are 1/8 inch (PT blank, G or NPT optional). Air loss means drift, not hold - the piston moves freely once pressure is gone, so a rod lock or pilot check valve is required for locked positions. Mount via the CA pivot or add SDB bracket hardware; the magnet needs no special-order piston.
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 MAC40X20SCA FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; 879.6 N push and 738.9 N pull at 0.7 MPa; 128.1 kgf theoretical maximum at 1.0 MPa. Supply range is 0.15-1.0 MPa (22-145 psi) and speed 30-800 mm/s.
It will not - the piston drifts once pressure is lost, so treat it as a mover rather than a lock. For a clamp that must stay shut on air failure, add a rod lock or pilot check valve; the air cushion only softens the final millimetres of travel.
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