Airtac MARF Stainless Steel Mini Air Cylinder MARF50X400S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF50X400S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 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 MARF50X400S
Four hundred millimetres of travel from a compact round-body cylinder is unusual, and the MARF50X400S backs it with 981.3 N of push at 0.5 MPa (1373.8 N at 0.7 MPa). The MAR front bracket is a flange built into the front cover - bolt it to the machine and the mounting job is done, no accessory flange or foot. Supply 0.15-1.0 MPa (22-145 psi) filtered air and it cycles at 30-800 mm/s.
Two details earn their keep on long strokes. First, the variable cushion at both ends absorbs the momentum a 400 mm travel builds up, protecting the aluminium-alloy covers. Second, the stainless barrel plus the 20 um hard-chrome 16 mm rod tolerates damp and dusty plant environments. As a planning figure, the 981.3 N push is about 100 kgf theoretical, so halve it for a 2:1 margin and expect roughly 50 kg of vertical lift; keep steady working loads near 589 N at 0.5 MPa.
Airtac MARF Stainless Steel Mini Air Cylinder MARF50X400S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF50X400S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 MARF50X400S
| 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. |
| ×400 | 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 MARF50X400S Is Used
Deep-tote pusher
Pushes loaded 600 mm totes home into racking lanes; 981.3 N at 0.5 MPa moves a full tote without strain.
Pallet spur transfer
Kicks pallets onto a gravity roller spur at line end, the cushion soaking up the impact of a loaded deck.
Sander dust-hood door
Slides the access door of a wood-shop sanding dust hood across 400 mm, powered by clean filtered air.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X400S the Right Cylinder?
A 40 mm bore on the same stroke yields only 628.3 N at 0.5 MPa, while a 63 mm bore jumps to 1557.9 N - pick by load, not by stroke. Over 400 mm of travel, side loads are the main enemy: guide the load on separate rails and keep the rod in pure tension or compression, or it will bend. If air is lost mid-stroke the piston drifts freely, so add a rod lock when the load must stay put. The standard magnet pairs with CMSG, DMSG or EMSG switches for mid-stroke signalling, and related MAC or MACJ cylinders suit jobs needing a separate flange/foot or adjustable cushioning.
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 MARF50X400S FAQ
At 0.5 MPa it pushes with 981.3 N and pulls with 880.8 N; at 0.7 MPa push is 1373.8 N. Theoretical peak at 1.0 MPa is 200.1 kgf. Bore 50 mm, stroke 400 mm, rod 16 mm (M14x1.5 male thread), 1/4" ports, front-flange mount.
A magnet is built into the piston as standard equipment, not an add-on, so CMSG, DMSG or EMSG switches clamp anywhere along the 400 mm barrel to report intermediate positions without modifying the cylinder.
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