Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 90mm 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
- Stroke90 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S
90 mm of travel, a 157 N push at 0.5 MPa and a front flange built into the body - that is the MARF20X90S in one line. This double-acting mini cylinder uses a riveted stainless-steel barrel with a hard-chrome plated 8 mm rod, pulling 132 N at 0.5 MPa and reaching 220 N of push at 0.7 MPa.
Both stroke ends carry a variable air cushion, so dial the needle screws in during commissioning and you can close a small slider at speed without hammering the covers. For sizing, assume roughly 94 N of continuous work at 0.5 MPa, or about 8 kg of vertical lifting with a 2:1 margin factored in. The front bracket means there is no separate foot or flange plate to buy.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 90 mm |
| Acting type | Double acting + cushion (front 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 MARF Stainless Steel Mini Air Cylinder MARF20X90S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 20 | Bore size in mm. |
| ×90 | 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 MARF Stainless Steel Mini Air Cylinder MARF20X90S Is Used
Carton kicker at pack-off
Knocks small mailer cartons off a takeaway conveyor into a tote; 157 N at 0.5 MPa is ample for 300 g cartons and the cushion quiets the kick.
Reagent tray indexer
Advances a reagent tray one 90 mm pitch per cycle on a benchtop diagnostics deck, with an EMSG switch reading the magnet for cycle counting.
Glue-head retract
Lifts a hot-glue head clear of a craft-workpiece jig between shots; about 8 kg of vertical capacity at a 2:1 margin covers head and hose weight.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X90S the Right Cylinder?
Between the 20 mm entry bore (157 N at 0.5 MPa) and the 25 mm bore one step up (245 N), this cylinder sits at the light-duty floor of the MAR family. It takes 1/8" ports and an M8x1.25 rod thread, and the magnet is fitted as standard for CMSG / DMSG / EMSG sensing. Remember the rod moves freely whenever air pressure falls - add an external lock if a station must stay positioned through an e-stop. At 90 mm of stroke, protect the 8 mm rod from side thrust with external guides.
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 MARF Stainless Steel Mini Air Cylinder MARF20X90S FAQ
Push 157 N, pull 132 N at 0.5 MPa; push 220 N, pull 185 N at 0.7 MPa; theoretical top force 32 kgf at 1.0 MPa. Double acting with a variable cushion at both ends, 0.15-1.0 MPa (22-145 psi) operating pressure, 30-800 mm/s speed, 90 mm stroke, 8 mm rod, 1/8" ports.
No. Every MA-series cylinder ships with a piston magnet already fitted, so CMSG, DMSG or EMSG switches drop straight onto the stainless tube for end-of-stroke or mid-stroke signalling.
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