Airtac MAC Stainless Steel Mini Air Cylinder MAC40X300SUH
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X300SUH is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 MAC40X300SUH
The MAC40X300SUH pairs the same riveted stainless construction as the rest of the MAC range - a rolled round barrel, aluminium covers and a 16 mm hard-chrome rod - with double acting operation and a variable air cushion at both ends. Fed at 0.5 MPa it produces 628.3 N of push and 527.8 N of pull, and the cushioning lets you approach the 800 mm/s top speed without jarring stops. For lifting maths, the raw push could raise about 64 kg vertically; halve that to 32 kg for a 2:1 margin on a real part.
The flat U back cover accepts direct bolting, and the letter H after SU is not among the standard MA ordering options in this guide - confirm its exact meaning from the current AirTAC datasheet before ordering. The magnet, by contrast, is standard equipment, so CMSG, DMSG and EMSG switches attach with no piston change. Supply window: 0.15-1.0 MPa (22-145 psi).
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X300SUH Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X300SUH |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MAC40X300SUH
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MAC40X300SUH Is Used
Slide gate assist on a pick module
Raises a 30 kg slide gate with a 2:1 margin, the air cushion landing the gate quietly at each end of its 300 mm travel.
Stack ejector on a palletiser
Ejects a formed carton stack 300 mm onto a takeaway belt, an EMSG switch confirming full extension every cycle.
Enclosure door actuator for burn-in racks
Pushes a large electrical cabinet door open during burn-in tests; the stainless body copes with the humid test room for years.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X300SUH the Right Cylinder?
Weigh the bore honestly: 40 mm gives 628.3 N at 0.5 MPa, a 32 mm bore only 402.2 N, and the 50 mm step-up 981.3 N - pick the smallest that clears the load with margin. Ports on this bore are 1/8" with an M12x1.25 rod thread; 300 mm sits comfortably inside the 500 mm standard stroke limit for the 40 mm family.
Because nothing inside locks the piston, air loss or a centred valve means the rod can drift under load - specify a rod lock or pilot check valve where that matters. Guide the load independently over the 300 mm travel so the 16 mm rod carries thrust alone, and add FA flange, LB foot or SDB pivot brackets if the flat U cover is not enough.
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 MAC40X300SUH FAQ
Count on 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, and 128.1 kgf theoretical at 1.0 MPa. The cushion is adjustable, not a brake, so keep a sizing margin rather than running at the rating.
The rolled stainless tube resists washdown, condensation and outdoor exposure far better than painted minis, and the 20 um hard-chrome rod keeps sealing surfaces smooth through dirty cycles. Riveted covers stay sealed without periodic re-torquing.
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