Airtac MAC Stainless Steel Mini Air Cylinder MAC40X125SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X125SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 MAC40X125SCM
A 40 mm bore pushing 628.3 N at 0.5 MPa makes the MAC40X125SCM the workhorse size of AirTAC's round mini family, and the CM round-end back cover gives it a clean rear face for fixed mounts. It is double acting - air extends and retracts the rod - with a variable air cushion at both ends, so you can run 30-800 mm/s and tune each stop. Inside, the stainless barrel carries a piston whose two-way seal stores its own grease, while the 16 mm rod is hard-chrome plated to shrug off corrosion on 0.15-1.0 MPa (22-145 psi) plant air.
Vertically, 628.3 N at 0.5 MPa equates to about 64 kg of lift; halve that to 32 kg and you have a realistic duty with margin for friction and pressure drop. The magnet is standard rather than an option, so CMSG / DMSG / EMSG switches mount on the barrel for end-of-stroke feedback from day one.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X125SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X125SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MAC40X125SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MAC40X125SCM Is Used
Insert staking press
Presses brass inserts into plastic housings with about 377 N of working force at 0.5 MPa; the cushion eases the ram off the part.
CNC enclosure door
Slides a 25 kg sheet-metal guard door on linear rails - well inside the 64 kg vertical equivalent - with an EMSG switch closing the interlock.
Bin hold-down
Clamps a tote bin against a scan station; 527.8 N of pull releases it and the round-end cover bolts flat to the machine plate.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X125SCM the Right Cylinder?
For the same stroke, a 32 mm bore gives 402.2 N at 0.5 MPa and a 50 mm bore gives 981.3 N, so pick by the load band your fixture actually sees. The CM round-end cover suits FA flange or LB foot fixing, while SDB pivot and CA eye versions exist for swinging links. This cylinder does not lock its load: if air drops or the valve centres, the rod drifts, so add a rod lock or pilot check valve wherever a part must stay raised. Over 125 mm of stroke, take side loads in external guides rather than on the rod itself.
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 MAC40X125SCM FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; at 0.7 MPa the figures are 879.6 N and 738.9 N, with a theoretical maximum of 128.1 kgf at 1.0 MPa. Ports are 1/8" and the 16 mm rod ends in an M12x1.25 male thread.
Both ends carry needle screws that should be backed off before first run, then closed in small steps until the load stops smoothly at speed. This variable cushion is why the MAC can handle faster cycles or heavier moving masses than a plain bumper cylinder without hammering its covers.
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