Airtac MARU Stainless Steel Mini Cylinder MARU20X55S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X55S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 55mm 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
- Stroke55 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 MARU20X55S
A 55 mm stroke on the smallest MAR bore makes the MARU20X55S a compact pick-and-place pusher: double acting, cushioned by adjustable air at both ends, and carried on an up-facing bracket that is part of the front cover rather than a purchased accessory. At 0.5 MPa the 20 mm bore extends with 157.0 N and retracts with 131.9 N.
Plan around 94 N of dependable push; in lifting terms that is 8 kg vertical once you halve for margin. Construction is a riveted stainless barrel around a hard-chromed 8 mm rod with no paint to chip - a real advantage in packaging and food cells where washdown drips are routine. The magnet fitted as standard pairs with CMSG, DMSG or EMSG switches for mid-stroke signalling.
Airtac MARU Stainless Steel Mini Cylinder MARU20X55S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X55S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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 MARU20X55S
| 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. |
| ×55 | 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 MARU20X55S Is Used
Tray advance on an indexer dial
Advances empty trays one station at a time on a rotary table; 94 N of working force at 0.5 MPa moves plastic trays without deforming them.
Marking press on PCB panels
Marks routed PCB panels before depaneling; the short 55 mm stroke keeps the cycle fast, and an EMSG switch on the built-in magnet gates the conveyor.
Sample press in a soil lab
Compacts small soil specimens in a test mould; the stainless barrel stands up to damp sample rooms that corrode painted-steel minis.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X55S the Right Cylinder?
For the same 55 mm motion at higher force, the 25 mm U-mount bore delivers 245.3 N at 0.5 MPa. The M8x1.25 rod thread and 1/8" ports keep plumbing simple; speed spans 30-800 mm/s and the cushion screws deserve a first-run tweak to suit your load. Because the piston drifts freely when air pressure drops, this is not a holding device - specify a rod lock if the 55 mm position must survive a supply failure.
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 MARU20X55S FAQ
Yes - the magnet is built into the piston as standard on the MA series, so CMSG, DMSG and EMSG switches clamp straight onto the barrel with no special-order piston and no charge for the magnet itself. On force: 157.0 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, and a theoretical 32 kgf maximum at the 20 mm bore.
The U version bolts up against the underside of a machine plate using the bracket integrated into the front cover, so no separate flange or foot bracket is needed. I and Y rod knuckles thread onto the M8x1.25 rod when the load requires a swivelling joint.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MARU Stainless Steel Mini Cylinder MARU20X55S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.