Airtac MARF Stainless Steel Mini Air Cylinder MARF20X185S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X185S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 185mm 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
- Stroke185 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 MARF20X185S
Need 185 mm of cushioned travel from a compact round body? This MARF front-flange cylinder uses a 20 mm bore rated 157 N push and 131.9 N pull at 0.5 MPa, rising to 219.8 N at 0.7 MPa. AirTAC rolls the stainless barrel and aluminium covers together, a sealed riveted construction that survives damp shops and light washdown better than painted minis.
Count on roughly 94 N at 0.5 MPa as the working band for a two-to-one margin, enough to lift around 8 kg vertically. The magnet is fitted at the factory, so CMSG or EMSG switches snap straight onto the barrel for end-of-stroke sensing, and both stroke ends carry an adjustable cushion to trim the stop. Supply is 0.15-1.0 MPa (22-145 psi) of filtered air. If the job later outgrows this bore, the MAC series keeps the mini-cylinder concept with separate flange and foot mounting.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X185S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X185S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 185 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 MARF20X185S
| 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. |
| ×185 | 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 MARF20X185S Is Used
Terminal riveting
Up to 219.8 N at 0.7 MPa gives enough head to rivet wire terminals in small harness assemblies.
Mold part ejection
Kicks cooled closures out of a plastic mold nest; the 185 mm stroke reaches deep into the cavity.
Sensor arm lifting
Lifts about 8 kg, so it raises a vision-inspection camera arm clear of the part after each measurement.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X185S the Right Cylinder?
Compare the 25 mm bore before you order: it lifts push to 245.3 N at 0.5 MPa, and there is no MAR bore below 20 mm to step down to. Strokes around 185 mm reward external guidance, since an 8 mm rod will bend under side loads. Where the machine must hold a mid-stroke position with the air off, pick a rod-lock cylinder instead - this one simply coasts when pressure disappears.
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 MARF20X185S FAQ
Numbers to size by: 157.0 N push and 131.9 N pull at 0.5 MPa, climbing to 219.8 N push and 184.7 N pull at 0.7 MPa, with a 32.0 kgf theoretical maximum at 1.0 MPa. Operating band is 0.15-1.0 MPa (22-145 psi), proof rated 1.5 MPa (215 psi), speed 30-800 mm/s.
Yes, better than most mini cylinders: the barrel is a stainless-steel tube with a 20 um hard-chrome plated carbon-steel rod and aluminium covers rolled on for a sealed joint. It handles splashes, humidity and outdoor exposure far better than painted-steel minis, though it carries no formal washdown certification.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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