Airtac MARF Stainless Steel Mini Air Cylinder MARF20X350S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X350S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 350mm 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
- Stroke350 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 MARF20X350S
Three hundred and fifty millimetres of stroke is where the MARF20X350S earns its keep: a 20 mm bore reaches across conveyors and fixtures without a separate bracket, because the front flange is built into the head. Double acting, cushioned both ends, 157 N push and 131.9 N pull at 0.5 MPa (22-145 psi).
Vertical lift math is simple: 157 N at 0.5 MPa equals about 16 kgf, so with a 2:1 margin plan on lifting roughly 8 kg. The stainless rolled body and hard-chrome rod hold up in washdown corners where painted mini cylinders blister, and the magnet is included as standard for CMSG / DMSG / EMSG switching.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X350S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X350S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 350 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 MARF20X350S
| 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. |
| ×350 | 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 MARF20X350S Is Used
Tote diverter on a picking conveyor spur
The 350 mm stroke swings totes into the spur while the dual air cushion keeps the stop gentle at full line speed.
Feed finger on an indexing rotary table
Advances parts the final 350 mm into the nest; about 94 N of working force seats them without marring the surface.
Latch actuator on an enclosure interlock door
Standard magnet with an EMSG switch proves the latched position before the controller energises the panel.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X350S the Right Cylinder?
Long throws amplify side load: over 350 mm, keep the 8 mm rod bending-free by guiding the load in a slide and threading any knuckle (I or Y) onto the M8x1.25 male thread. Bore 20 is the smallest MAR size - the 25 mm bore gives 245 N and the 32 mm bore 402 N at 0.5 MPa if you need more push. This cylinder retracts under air but does not lock; a rod lock is the answer when the load must hold with pressure off. Mounting is already on the cylinder, so no separate foot or flange accessory applies.
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 MARF20X350S FAQ
At 0.5 MPa: push 157.0 N, pull 131.9 N. At 0.7 MPa: push 219.8 N, pull 184.7 N. Theoretical peak at 1.0 MPa is 32.0 kgf. Supply window is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, port 1/8", rod thread M8x1.25.
Open the needle screws fully before first air, run the cylinder at low speed, then close each needle until end-of-stroke travel just softens. The variable cushion works at both ends, so a 350 mm reach at up to 800 mm/s can stop without hammering the covers. Re-check the setting after any speed change.
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