Airtac MARU Stainless Steel Mini Cylinder MARU20X155S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X155S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 155mm 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
- Stroke155 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 MARU20X155S
With 155 mm of travel from a 20 mm bore, the MARU20X155S is a double-acting round mini cylinder whose top (U) bracket is riveted straight into the body, so mounting comes built in rather than bolted on later. It pushes 157 N and pulls 131.9 N at 0.5 MPa (219.8 N at 0.7 MPa) on 0.15-1.0 MPa (22-145 psi) supply air.
Both ends carry a variable air cushion, so faster cycles or heavier transfers do not hammer the aluminium covers. The stainless barrel and hard-chrome carbon-steel rod handle damp and lightly washed-down surroundings that rust painted minis. Budget roughly 94 N of genuine working force at 0.5 MPa (0.6 of the 157 N rating) when you size the load.
Airtac MARU Stainless Steel Mini Cylinder MARU20X155S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X155S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 155 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 MARU20X155S
| 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. |
| ×155 | 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 MARU20X155S Is Used
Fill-line diverter valve
Strokes a lightweight diverter on a beverage filling line, the 155 mm throw covering the full gate travel.
Chamber door latch
Retracts the latch pin on an environmental test chamber door, with a switch confirming each end of travel.
PCB jig hold-down
Applies a light clamp to a PCB soldering jig in electronics assembly, where 94 N of practical force is enough.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X155S the Right Cylinder?
If a 157 N push at 0.5 MPa leaves too little headroom, step to the 25 mm MAR bore at 245.3 N; there is no bore below 20 mm in this series. The extra 5 mm over a 150 mm stroke follows the same rule as any long throw: keep the 8 mm rod away from side loads with external guiding.
Do not rely on this cylinder to hold position through an air-loss event - the piston drifts, and a rod lock is the correct fix. The U bracket is integrated, and the standard magnet pairs with CMSG, DMSG and EMSG switches.
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 MARU20X155S FAQ
Push 157 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; theoretical maximum 32 kgf at 1.0 MPa for this 20 mm bore.
Yes. Every MA-series cylinder ships with the magnet built into the piston as standard, so CMSG, DMSG or EMSG switches mount on the barrel with no special-order piston.
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 MARU20X155S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.