Airtac MARU Stainless Steel Mini Cylinder MARU20X70S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X70S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 70mm 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.
- BoreØ20 mm
- Stroke70 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU20X70S
Where space is tight and the load is light, the MARU20X70S fits: a 20 mm round-body mini cylinder with a 70 mm stroke, double acting and cushioned at both ends. AirTAC rolls the aluminium covers straight onto the stainless barrel, giving a riveted body that shrugs off washdown splash and humid air far better than painted minis. Its front cover carries the top mounting bracket as part of the casting, and the magnet is included from the factory for CMSG, DMSG and EMSG sensing.
On 0.5 MPa the piston delivers 157 N extending and 131.9 N retracting; at 0.7 MPa extend force reaches 219.8 N. Deduct the usual margin and you can commit about 94 N to the actual work, roughly the push needed for a light divert or a small clamp. Expressed as lifting ability, the rod raises about 8 kg vertically with a 2:1 factor built in.
Airtac MARU Stainless Steel Mini Cylinder MARU20X70S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X70S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MARU20X70S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 20 | Bore size in mm. |
| ×70 | 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 MARU20X70S Is Used
Wire-harness splice press on a bench fixture
Crimping small splices needs a controlled press of around 90 N; with the cushion tuned, the ram settles onto the splice instead of bouncing, protecting the die set.
Parcel diverter gate on a sorting conveyor
Kicking light parcels across a lane: the about-94 N working push at 0.5 MPa handles cartons up to a few hundred grams, and the stainless body tolerates dusty conveyor halls.
Adjustable stop on a gauge calibration rig
Setting a repeatable reference stop: the standard magnet flags end-of-travel to the test software, and the cushion gives a soft, repeatable seat against the gauge.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X70S the Right Cylinder?
The 70 mm stroke is standard - MAR bores take up to 500 mm without a custom order - so lead times stay normal. If 157 N at 0.5 MPa is marginal for the job, move to the 25 mm bore (245 N) or the 32 mm bore (402 N); both share the same integrated bracket approach. Keep side loads off the 8 mm rod: for a 70 mm stroke, guide the load externally if it wants to pivot, or the rod will wear its bushing early.
Remember this cylinder relaxes when air is removed - nothing in a standard double-acting design stops the load drifting, so use a rod-lock version where position must survive a power cut. Air connection is a 1/8" port; the rod end is threaded M8x1.25 and accepts I or Y knuckles.
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 MARU20X70S FAQ
Extend 157 N and retract 131.9 N at 0.5 MPa; extend 219.8 N and retract 184.7 N at 0.7 MPa; theoretical maximum 32 kgf at 1.0 MPa. The rod is 8 mm with an M8x1.25 thread and the air ports are 1/8".
The stainless tube and hard-chrome plated rod do not rely on paint for corrosion protection, so frequent wipe-downs, condensation and mild chemicals will not flake debris into your process. Because the covers are rolled onto the barrel, the body stays sealed over its whole service life, indoors or out.
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