Airtac MAC Stainless Steel Mini Air Cylinder MAC40X115SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X115SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 115mm 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
- Stroke115 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 MAC40X115SU
A 115 mm stroke covers the gap where 100 mm runs short and 125 mm overshoots, and this bore still has 385 mm of range in hand. The MAC40X115SU is double acting with adjustable air cushions at both ends; at 0.5 MPa it pushes 628.3 N and pulls 527.8 N, which translates to about 377 N of dependable working force or a vertical hoist near 32 kg at a 2:1 margin. Turn the supply to 0.7 MPa and push reaches 879.6 N.
Its stainless round barrel is rolled together with aluminium-alloy covers and a stainless-steel block, a riveted body that takes mist, splash and outdoor exposure far better than painted minis. The hard-chrome 16 mm rod resists scoring where alignment is less than perfect. The magnet is standard, so CMSG, DMSG or EMSG switches read position anywhere on the travel.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X115SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X115SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 115 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 MAC40X115SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×115 | 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 MAC40X115SU Is Used
Glue head extension on a carton line
The rod carries a hot-glue nozzle across a 115 mm gap to reach the far flap of a wide box, retracting fully clear for changeover to a smaller carton.
Reject-lane pusher on a sorting conveyor
Mounted mid-line, it tips mixed parts from the main belt into a reject lane, the cushion absorbing the impact of a steady parts stream at speed.
Fixture riser under a drill jig
The cylinder lifts a 25 kg jig plate about 40 mm so the operator can swap castings, comfortably inside its 32 kg vertical lift equivalent.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X115SU the Right Cylinder?
Step sizing is worth a check: the 32 mm MAC delivers only 402.2 N at 0.5 MPa, little more than the 377 N you should actually plan on, so step up to this 40 mm (628.3 N) unless the load is tiny; the 50 mm bore at 981.3 N is there for future growth. Because the rod is exposed across 115 mm plus cover length, guide any off-axis load with rails or a guide pin - side load bends rods, it does not argue with them. When air is removed mid-stroke the piston coasts freely; a pilot check valve or rod lock holds it.
The U flat-end cover bolts flush to machine plates, LB foot and FA flange brackets also fit, and the 1/8" PT ports plus M12x1.25 rod thread keep plumbing simple.
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 MAC40X115SU FAQ
Here they are in one place: push 628.3 N and pull 527.8 N at 0.5 MPa, push 879.6 N and pull 738.9 N at 0.7 MPa, and a theoretical maximum of about 128.1 kgf at 1.0 MPa. Treat 377 N as the practical push budget at 0.5 MPa.
The tube is stainless steel, the 16 mm rod is carbon steel with 20 um of hard chrome, and the aluminium-alloy covers are rolled onto the barrel - so there are no through-bolts to work loose under vibration, and the finish shrugs off coolant splash and washdown mist.
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