Airtac MARU Stainless Steel Mini Cylinder MARU40X250S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X250S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MARU40X250S
Long reach without giving up force: the MARU40X250S covers 250 mm of stroke with a 628 N push at 0.5 MPa from its 40 mm bore, at working pressures of 0.15-1.0 MPa (22-145 psi). AirTAC rolls the U (up/top) mounting bracket into the cylinder body, so the MAR carries its own mount instead of relying on a separate flange or foot accessory.
Translated into lifting terms, 628 N supports about 64 kg; with a 2:1 margin that is roughly 32 kg of vertical lift per cylinder. The riveted stainless barrel and hard-chrome rod handle splash and humidity better than painted minis, the variable air cushion at both ends lets you dial out end-of-stroke shock at speeds up to 800 mm/s, and the standard built-in magnet pairs with CMSG / DMSG / EMSG switches. If the load must stay put on air loss, fit a rod lock - a cushion only softens the stroke end.
Airtac MARU Stainless Steel Mini Cylinder MARU40X250S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X250S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MARU40X250S
| 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. |
| ×250 | 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 MARU40X250S Is Used
Deep-die part ejection
A stamping shop uses the 250 mm stroke to eject formed parts from a deep die, with the 628 N push at 0.5 MPa clearing parts on the upstroke.
Bakery tray stacker
A bakery line lifts stacks of bread trays about 32 kg per cylinder with a 2:1 margin, the stainless barrel coping with flour dust and frequent washdown.
Pallet-lane pusher
The long 250 mm pusher arm moves pallets into a staging lane in a distribution warehouse; the cushion removes the bang at the end of each 800 mm/s stroke.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X250S the Right Cylinder?
If 628 N at 0.5 MPa is more than the load needs, a 32 mm bore MAR (402 N) shortens the package; if the load climbs toward 900 N or more, the 50 mm bore delivers 981 N. Working pressure spans 0.15-1.0 MPa (22-145 psi) and speed 30-800 mm/s. A plain MAR will not park a load when pressure drops, so specify a rod lock if holding is required. The magnet is already in the piston for CMSG / DMSG / EMSG switches, and at 250 mm of stroke keep side loads off the rod by guiding the part or using external linear bearings.
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 MARU40X250S FAQ
It runs on 0.15-1.0 MPa (22-145 psi) filtered air with a 1.5 MPa (215 psi) proof pressure. Force output: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a theoretical maximum of 128.1 kgf at 1.0 MPa. Ports are 1/8" and the rod thread is M12x1.25.
Turn the cushion needle screws at each cover while cycling the cylinder. Start with them nearly closed, open gradually until the end-of-stroke knock disappears, then lock the setting. The variable cushion then lets you run up to 800 mm/s or carry heavier loads without hammering the covers.
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