Airtac MARU Stainless Steel Mini Cylinder MARU40X400S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X400S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU40X400S
Travel is the headline here: 400 mm of it, driven by a 40 mm double-acting piston with adjustable air cushions at each end and an up-mount bracket formed into the front cover, eliminating any add-on flange. The riveted stainless barrel and 20 um hard-chrome rod resist the humidity and rinse-down cycles that swell or corrode aluminium-bodied minis. Rod thread is M12x1.25, ports are 1/8", rod diameter 16 mm.
Numbers buyers care about: 628.3 N of push at 0.5 MPa, with a practical budget of around 377 N - enough to raise roughly 32 kg vertically while keeping a 2:1 reserve. Dialing the cushion needles in on first run lets the long stroke settle without hammering the covers, even at the full 800 mm/s. Every unit ships magnetic as standard for CMSG / DMSG / EMSG sensing; supply 0.15-1.0 MPa (22-145 psi) and clean 40 um air.
Airtac MARU Stainless Steel Mini Cylinder MARU40X400S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X400S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting + cushion (up mount) |
| 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 MARU Stainless Steel Mini Cylinder MARU40X400S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
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 MARU Stainless Steel Mini Cylinder MARU40X400S Is Used
Feed-mill slide gate
Dropping 25 kg ingredient batches through a hopper slide gate; 628.3 N of push shears pellet bridges and the 400 mm stroke opens the gate fully for flushing.
Sort-lane carton ejector
Pushing pick cartons off a long sortation lane to the takeaway conveyor, with external guides carrying the load over the 400 mm travel.
Kiln damper drive
Cracking open a heat-treat oven damper where a warm machine skin sits inside the -20 to +70 C rating and the chrome-plated rod resists scale dust.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X400S the Right Cylinder?
Check the neighbours first: 32 mm bore pushes 402.2 N and 50 mm bore 981.3 N at 0.5 MPa, against 628.3 N here. Over 400 mm of travel the 16 mm rod is exposed to buckling and side-load wear, so carry the load in external guides. Air loss equals drift on a cushioned-but-unlocked cylinder like this, so add a rod lock when held positions matter. No FA or LB parts are required - the U-mount front bracket is built in, and the standard magnet suits CMSG / DMSG / EMSG switches.
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 MARU Stainless Steel Mini Cylinder MARU40X400S FAQ
The 40 mm bore pushes 628.3 N and pulls 527.8 N at 0.5 MPa. At 0.7 MPa push rises to 879.6 N; theoretical peak force is 128.1 kgf at 1.0 MPa. Those figures assume 0.15-1.0 MPa (22-145 psi) supply and 30-800 mm/s travel.
The stainless-steel tube plus 20 um hard-chrome plated rod tolerate moisture, dust and routine rinse-down far better than painted or bare-aluminium mini cylinders. For aggressive chemical exposure, confirm compatibility from the datasheet before specifying.
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