Airtac MARF Stainless Steel Mini Air Cylinder MARF20X70S
The AirTAC MARF Stainless Steel Mini Air Cylinder MARF20X70S is a genuine double acting + cushion (front 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 (front mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X70S
Seventy millimetres of travel in a 20 mm stainless round body: MARF20X70S is a double-acting mini cylinder with adjustable air cushioning at each end, and the front flange is rolled straight into the front cover so the unit bolts onto the machine frame with no loose hardware. At 0.5 MPa this bore delivers 157 N forward and 132 N back.
The chrome-plated carbon-steel rod inside the stainless barrel shrugs off humidity and light washdown, and the built-in magnet, standard on every MA cylinder, picks up CMSG, DMSG and EMSG switches out of the box.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X70S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X70S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 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 MARF20X70S
| 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. |
| ×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 (double rod, 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 MARF20X70S Is Used
Conveyor gate diverter
Push a slide gate across a small parts conveyor; the 70 mm throw clears a 60 mm lane while 157 N at 0.5 MPa moves a stream of zinc-plated brackets.
Sample tray indexer
Advance a lab sample tray one station at a time; the adjustable cushion stops the tray tapping the end stops during fast cycles anywhere in the 30-800 mm/s range.
Hopper slide valve
Drive a stainless slide plate under a mini powder hopper, where the corrosion-resistant barrel suits dusty, occasionally washed-down food-handling areas.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X70S the Right Cylinder?
If 157 N at 0.5 MPa is tight for your load, the next bore up (25 mm) reaches 245 N at the same pressure. Cushion needles at both ends let you trim end-of-stroke shock when running close to 800 mm/s. The 1/8" port and M8x1.25 rod thread keep plumbing compact on a small machine. Position is not held on air loss - the piston simply drifts - so add a rod lock if the load must stay put. A 70 mm stroke is standard for this bore (up to 500 mm).
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 MARF20X70S FAQ
Bore 20 mm: 157 N push and 132 N pull at 0.5 MPa; 220 N push and 185 N pull at 0.7 MPa; 32 kgf theoretical maximum at 1.0 MPa. Rod 8 mm with M8x1.25 male thread, 1/8" air port, standard strokes to 500 mm, pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
Needle screws at both stroke ends meter the exhaust air, so you can soften deceleration as speed or load rises. The barrel is stainless steel and the rod is hard-chrome plated carbon steel, a combination that holds up in damp or lightly washed environments where painted mini cylinders degrade.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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