Airtac MARF Stainless Steel Mini Air Cylinder MARF20X175S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X175S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 175mm 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
- Stroke175 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 MARF20X175S
Built on a rolled stainless-steel barrel with a hard-chrome plated carbon-steel rod, the MARF20X175S shrugs off mild corrosion and light washdown where painted-steel minis would corrode. Its 20 mm bore pushes 157 N and pulls 131.9 N at 0.5 MPa, and the front-flange bracket is riveted into the front cover, so it bolts straight to the machine with no extra flange to buy.
A variable air cushion at both ends lets you dial out end-of-stroke shock with the needle screws, so faster cycles and heavier loads stop without hammering the covers. For sizing, plan on about 94 N of usable force at 0.5 MPa, or a vertical lift near 8 kg with a two-to-one margin. The magnet ships built in, so CMSG, DMSG or EMSG switches clip on without a special-order piston.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X175S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X175S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 175 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 MARF20X175S
| 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. |
| ×175 | 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 MARF20X175S Is Used
PCB tray indexing
Pushes 157 N to index loaded electronics trays onto a PCB conveyor; the 175 mm stroke clears a full lane transfer in one move.
Casting lift-off
With roughly 8 kg vertical lift capacity at a 2:1 margin, it raises small aluminium castings out of a die-casting jig.
Chute gate actuation
Opens and closes slide gates on a grain-packaging chute; the cushioned ends bring the gate to a soft stop even on fast lines.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X175S the Right Cylinder?
Step up to the 25 mm bore (245.3 N push at 0.5 MPa) when 157 N feels tight; the MAR line starts at 20 mm, so nothing smaller exists. At 175 mm stroke, keep side loads off the 8 mm rod and guide the load externally if the part could tilt. Air feeds through 1/8 inch ports, and like every plain MAR the piston drifts if supply pressure drops - a rod lock is the fix when holding under air loss is required.
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 MARF20X175S FAQ
At 0.5 MPa the 20 mm bore pushes 157.0 N and pulls 131.9 N; at 0.7 MPa that rises to 219.8 N push and 184.7 N pull. The theoretical maximum is 32.0 kgf at 1.0 MPa. Air supply is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and stroke speed runs 30-800 mm/s.
No - the F in MARF means the front-flange bracket is riveted into the front cover as part of the body, so there is no separate flange or foot to order. Rod threads are M8x1.25, so I and Y knuckle joints thread straight on if the load needs a swivel.
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