Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø50mm bore and 20mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S
Where a 20 mm stroke does the job, the MARF50X20S keeps the 50 mm bore's full muscle in a very short body. It is double acting with variable cushions at both ends, and the F front flange is integral to the front cover, so it bolts flat against a fixture plate without extra brackets. Construction is the MA rolling-packed format: stainless tube, riveted aluminium covers, hard-chrome plated 16 mm rod.
Short strokes concentrate force: 981.3 N push and 880.8 N pull at 0.5 MPa, rising to 1373.8 N at 0.7 MPa. For clamping sums, work with about 589 N (60% of the 0.5 MPa rating), which holds or lifts close to 50 kg vertically at a 2:1 margin. The piston magnet comes standard, so CMSG, DMSG or EMSG position switches drop on without options.
Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MARF50X20S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 50 | Bore size in mm. |
| ×20 | 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 MARF50X20S Is Used
Fixture clamping on CNC tables
Clamps brackets or blocks with about 589 N of working force; the 20 mm stroke suits hold-downs where travel is minimal.
Pin pusher in jigs
Pushes locating pins or stops in and out of a jig with full 50 mm bore force in a tiny envelope.
Kicker on small-part sorting
Flicks small parts off a chute or bowl-feed track; the standard magnet plus a CMSG switch confirms each kick completed.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X20S the Right Cylinder?
This short stroke suits clamping and kick duties: full 50 mm bore force, 981.3 N at 0.5 MPa, with about 589 N available for real work. If the task needs less, a 40 mm bore (628.3 N) makes a smaller, cheaper package; if more, the 63 mm bore pushes 1557.9 N. Short bodies see high side-load spikes in clamping, so seat the flange flat and align the tooling square to the rod. A standard MAR will not hold position when air is removed - fit a rod lock if that matters. With the magnet built in, CMSG, DMSG and EMSG switches signal clamp state without any special order.
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 MARF50X20S FAQ
The 50 mm bore gives 981.3 N push and 880.8 N pull at 0.5 MPa, 1373.8 N push and 1233.1 N pull at 0.7 MPa, and 200.1 kgf theoretical maximum at 1.0 MPa. Pressure range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating.
Bore 50 uses 1/4" air ports and an M14x1.5 male rod thread on the 16 mm hard-chrome plated rod. It runs on air filtered to 40 um from -20 to +70 C, and I or Y rod knuckles can be fitted to the thread for linkage work.
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