Airtac MARU Stainless Steel Mini Cylinder MARU40X120S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X120S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 120mm 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
- Stroke120 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 MARU40X120S
A 120 mm stroke on a 40 mm bore gives the MARU40X120S reach as well as muscle: 628 N forward and 528 N back at 0.5 MPa, climbing to 880 N at 0.7 MPa. AirTAC builds it as a double-acting round mini with the top bracket integrated into the cover and a variable cushion at each stroke end.
Working figures help sizing: budget about 377 N of genuine work at 0.5 MPa, enough to raise roughly 32 kg vertically with a 2:1 reserve. The riveted stainless tube and hard-chromed 16 mm rod shrug off humidity and light washdown better than painted minis, while the built-in standard magnet drives CMSG / DMSG / EMSG position switches. Range: 0.15-1.0 MPa (22-145 psi), 30-800 mm/s.
Airtac MARU Stainless Steel Mini Cylinder MARU40X120S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X120S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 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 MARU40X120S
| 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. |
| ×120 | 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 MARU40X120S Is Used
Tray nest ejector
Ejects filled trays from a nesting station on a food line; the 120 mm stroke clears the nest fully while the stainless body handles rinse zones.
Test rig access gate
Raises a counterweighted access gate on a leak-test rig; about 32 kg of vertical capability keeps the margin healthy cycle after cycle.
Nip height setting
Sets roller nip height on a bag-making machine between two product sizes; cushioned ends stop the 120 mm travel without jolt.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X120S the Right Cylinder?
At 0.5 MPa the 32 mm bore offers 402 N and the 50 mm bore 981 N, bracketing this model's 628 N. If the load must remain held between signals, this cylinder will not manage it - air loss lets the piston coast, so pair it with a rod lock. The up bracket is part of the cylinder, so no accessory foot is required; I and Y knuckles fit M12x1.25, and CMSG switches read position straight off the standard magnet. With 120 mm of stroke, support any lateral load with external guidance to keep rod bending low.
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 MARU40X120S FAQ
Push 628 N and pull 528 N at 0.5 MPa; push 880 N and pull 739 N at 0.7 MPa; theoretical maximum output 128.1 kgf at 1.0 MPa. Rod is 16 mm with M12x1.25 thread; port size is 1/8".
Unlike painted or extruded-aluminium minis, the rolled stainless tube with its hard-chrome plated rod handles damp shop air, splashes and outdoor duty with minimal corrosion worry, and the grease-retaining two-way piston seal keeps the 30-800 mm/s travel smooth between services.
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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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