Airtac MARU Stainless Steel Mini Cylinder MARU40X300S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X300S is a genuine double acting + cushion (up mount) 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 (up mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU40X300S
Long travel in damp or washdown areas is where the MARU40X300S earns its keep: the stainless-steel barrel and hard-chrome plated 16 mm rod shrug off the mild corrosion that ruins painted-steel minis, and the aluminium covers roll tightly onto the tube for a sealed, riveted body. Double-acting with a variable cushion at both ends, it pushes 628 N and pulls 528 N at 0.5 MPa, rising to 880 N push at 0.7 MPa.
The U front bracket is built into the cylinder, so mounting means bolts to the machine rather than an extra flange part on the order. At 0.5 MPa keep continuous work near 377 N, which corresponds to lifting about 32 kg vertically with a 2:1 margin. The built-in magnet is standard equipment, ready for CMSG, DMSG or EMSG switches without a special piston.
Airtac MARU Stainless Steel Mini Cylinder MARU40X300S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X300S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MARU40X300S
| 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. |
| ×300 | 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 MARU40X300S Is Used
Hopper slide gate actuator
Opening and closing a feed-mill hopper slide; the 300 mm stroke matches full gate travel and 628 N breaks packed meal bridges.
Solar tracker row drive
Extending a tracker linkage row in outdoor duty, where the stainless barrel resists weathering far better than painted alternatives.
Roller-transfer pallet nudge
Nudging pallets onto a gravity roller spur; the top bracket mounts the cylinder flush against the transfer frame.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X300S the Right Cylinder?
Force ladder at 0.5 MPa: 402 N for a 32 mm MAR, 628 N here at 40 mm, 981 N for a 50 mm MAR. On a 300 mm stroke, keep the load aligned or run it on an external guide; side loads on a long stroke bend the 16 mm rod and chew the seals. If the application must stay put through a pressure drop, remember the MAR drifts - the cushion only damps the stroke ends - so add a rod lock for holding. The standard magnet makes switch installation a drop-on job.
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 MARU40X300S FAQ
Push 628 N and pull 528 N at 0.5 MPa; push 880 N and pull 739 N at 0.7 MPa; 128.1 kgf theoretical maximum at 1.0 MPa. The 300 mm stroke is a standard length, porting is 1/8", rod thread is M12x1.25, and speed spans 30-800 mm/s.
The barrel is stainless steel and the rod is carbon steel plated with 20 um of hard chrome, so splashes, humidity and outdoor exposure cause far less trouble than on painted-steel mini cylinders. Covers are aluminium alloy riveted onto the tube - a rolled round-body construction, not bolted plates.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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