Airtac MARF Stainless Steel Mini Air Cylinder MARF20X450S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X450S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 450mm 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
- Stroke450 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 MARF20X450S
Stroke-to-length is the selling point here: the MARF20X450S reaches 450 mm, close to the bore's 500 mm standard maximum, while staying a slim 20 mm stainless mini. Double acting with a front-flange bracket rolled into its covers, it produces 157 N push and 132 N pull at 0.5 MPa and covers the full 30-800 mm/s speed band.
An 8 mm rod over 450 mm of travel deserves straight tracking - align the flange square to the motion and guide the load externally, then let the adjustable cushion screws absorb the end-of-stroke shock on both sides. On 0.15-1.0 MPa (22-145 psi) air the bore can theoretically lift about 16 kg, though planning near 8 kg with a 2:1 margin is wiser. The magnet is built in as standard, so a CMSG or EMSG switch drops straight on.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X450S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X450S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 450 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 MARF20X450S
| 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. |
| ×450 | 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 MARF20X450S Is Used
Tray pusher at a bakery oven infeed
Sweeps loaded baking trays onto the chain over 450 mm; the stainless barrel stands up to humid, heat-adjacent air.
Retracting stop on a panel saw outfeed
A long-stroke stop that drops out of the board path; external rollers carry the board weight, sparing the 8 mm rod.
Lid lift on a 450 mm deep curing tank
Raises a light cover of about 8 kg with a 2:1 margin; guide links take the moment load off the rod as the lid tilts.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X450S the Right Cylinder?
At 450 mm you are 50 mm short of the bore's 500 mm standard limit; anything longer becomes a made-to-order stroke. Force is unchanged by length: 157 N push and 132 N pull at 0.5 MPa, and a 32 kgf theoretical maximum at 1.0 MPa. Keep side loads off the rod across this span by hanging the payload from an external guide, not the rod itself. If the application must hold with power off, the piston will not stay put on its own - pair the cylinder with a rod lock. Heavier jobs belong on the 25 mm bore (245 N at 0.5 MPa) or the 32 mm bore (402 N).
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 MARF20X450S FAQ
Stroke length does not change the figures: 157 N push and 132 N pull at 0.5 MPa, 220 N push and 185 N pull at 0.7 MPa, and a 32 kgf theoretical maximum at 1.0 MPa. Rod thread is M8x1.25 and the air port is 1/8 inch.
Nothing extra. The front flange is rolled into the cylinder's own covers, so screws through the flange fix the whole 450 mm body to the frame - no separate foot, flange or bracket accessory to order. Only add an external guide for the payload to keep side loads off the 8 mm rod over this span.
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