Airtac MARU Stainless Steel Mini Cylinder MARU20X275S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X275S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 275mm 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
- Stroke275 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 MARU20X275S
A 275 mm travel on a 20 mm bore makes the MARU20X275S a long-reach light pusher: 157 N forward and 131.9 N back at 0.5 MPa, 219.8 N forward once you raise supply to 0.7 MPa. The body is AirTAC's riveted MA construction - stainless round barrel, aluminium covers, chrome-plated 8 mm rod - with the top/up bracket integral to the front cover. Supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, cushion adjustable at both stroke ends.
For sizing, treat 157 N / 9.81 as about 16 kg of theoretical vertical lift at 0.5 MPa; halve it for a 2:1 margin and you can comfortably lift around 8 kg. The stainless tube tolerates washdown and humid air far better than painted minis, which suits food-adjacent and outdoor machines. Sensors are a fit-and-go job because the magnet ships inside the piston: clip a CMSG, DMSG or EMSG switch to the barrel for end-of-stroke signals.
Airtac MARU Stainless Steel Mini Cylinder MARU20X275S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X275S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 275 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 MARU20X275S
| 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. |
| ×275 | 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 MARU20X275S Is Used
Deposit head on a filling machine
Dips a filling nozzle into a bottle and retracts 275 mm clear of the star wheel; the lower cushion eases the nozzle in without splash.
Test-bench clamp stroke
Swings a clamp arm over a test coupon on a 275 mm reach; around 94 N of working force holds light components in place.
Label applicator pad advance
Drives a tamp pad down onto cartons moving past; cushioning at the bottom keeps the pad from bouncing on impact.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X275S the Right Cylinder?
Start here when 270-280 mm of reach meets a load under about 94 N of real work (60 percent of the 157 N push). Heavier duties belong to the 25 mm bore at 245 N or the 40 mm bore at 628 N, both 0.5 MPa figures. Long strokes amplify misalignment, so mount the U bracket on a machined flat and guide the load separately; the M8x1.25 rod thread accepts I or Y knuckles for swing motion. If the arm must stay put with air off, add a rod lock - this cylinder drifts on air loss. Ports are 1/8"; the magnet is standard.
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 MARU20X275S FAQ
At 0.5 MPa: 157 N push, 131.9 N pull. At 0.7 MPa: 219.8 N push, 184.7 N pull. Maximum theoretical force 32 kgf at 1.0 MPa. Bore 20 mm, stroke 275 mm, rod 8 mm with M8x1.25 thread, 1/8" air port, speed 30-800 mm/s.
Yes - the round stainless barrel and the hard-chrome plated rod are both corrosion-resistant, and the riveted aluminium covers keep the seal line tight. Unlike painted mini cylinders, the MAR keeps working through humidity, splash and routine hose-downs. The magnet is already inside, so CMSG/DMSG/EMSG position switches mount without options.
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