Airtac MARF Stainless Steel Mini Air Cylinder MARF20X80S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X80S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MARF20X80S
A front-flanged, riveted round-body mini cylinder, the MARF20X80S runs double acting with a variable air cushion at both stroke ends and an integrated front bracket, so it bolts straight onto the machine with no separate flange or foot. The 20 mm bore delivers 157 N push and 132 N pull at 0.5 MPa across an 80 mm stroke.
Work to about 94 N of that rating for dependable cycling at 0.5 MPa, which covers roughly 8 kg of vertical lift once a 2:1 margin is applied. The stainless-steel barrel and hard-chrome plated 8 mm rod shrug off washdown and damp workshop air where painted or plain aluminium mini cylinders soon pit, and the standard piston magnet accepts CMSG / DMSG / EMSG switches without special ordering.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X80S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X80S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MARF20X80S
| 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. |
| ×80 | 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 MARF20X80S Is Used
Blister-tray ejector
Pushes formed blister trays off a small thermoforming table; 157 N at 0.5 MPa clears one tray per 80 mm stroke with the cushion damping the return.
Sample-tube diverter
Diverts 30 mm centrifuge tubes between two lab-analyser rails, using the built-in magnet and a CMSG switch to confirm the home position.
Bracket clamp in a screw cell
Clamps small aluminium brackets while two screws are driven in a bench cell; the 94 N working figure at 0.5 MPa holds light parts without marking.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X80S the Right Cylinder?
Bore 20 is the entry size of the MAR range; if 157 N at 0.5 MPa feels tight, the next bore up (25 mm) pushes 245 N in the same compact envelope. Ports are 1/8" and the rod thread is M8x1.25. The piston is not held on air loss - it drifts when supply pressure drops, so fit a rod lock if the position must stay put. Keep side loads low on the 8 mm rod over this 80 mm travel and guide the load externally where possible.
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 MARF20X80S FAQ
Push is 157 N and pull 132 N at 0.5 MPa; at 0.7 MPa those rise to 220 N and 185 N, and the theoretical maximum at 1.0 MPa is 32 kgf. It is double acting with an adjustable air cushion at both ends, runs on 0.15-1.0 MPa (22-145 psi) air at 30-800 mm/s, and covers 80 mm of stroke on an 8 mm rod with 1/8" ports.
The high-precision stainless barrel resists corrosion and washdown far better than painted-steel mini cylinders, and the hard-chrome plated carbon-steel rod keeps the sealing surface smooth. The aluminium covers and rolling-packed construction stay sealed through repeated damp cycles.
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