Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø40mm bore and 15mm 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.
- BoreØ40 mm
- Stroke15 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S
Short 15 mm strokes are where this flange-mounted 40 mm bore MAR earns its keep: 628 N of push and 528 N of pull at 0.5 MPa from a body that barely projects past its own flange. The two-way piston seal traps grease in its groove for long service life, and needle-screw cushions take care of the bounce that short strokes otherwise amplify at up to 800 mm/s.
Plan the tooling around about 377 N of dependable push at 0.5 MPa rather than the headline 628 N; vertically, the full rating equals roughly 64 kg of lift, so moving more than 32 kg leaves too thin a margin. Signalling needs no extras - the magnet ships inside every piston, ready for CMSG, DMSG or EMSG switches on the barrel.
Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MARF40X15S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 40 | Bore size in mm. |
| ×15 | 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 MARF40X15S Is Used
Part detent on a rotary indexing table
A 15 mm flick seats or releases the indexing detent pin, and 628 N of push at 0.5 MPa holds the table positive between indexes.
Sample vial ejector in a lab autoloader
The compact throw nudges vials off a rail into the collection chute, while the stainless barrel shrugs off repeated alcohol wipe-downs in the lab.
Tooling status flag on a CNC pallet
A flag on the rod trips a DMSG switch to confirm pallet clamp status, with the short 15 mm stroke keeping the flag inside the fixture envelope.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X15S the Right Cylinder?
Where 628 N of push at 0.5 MPa overkills a light detent or gate job, the 25 mm bore saves space with 245 N; where clamping needs more than 900 N, the 50 mm bore delivers 981 N. Keep in mind this cylinder releases its load on air loss - it is not a lock, and a rod lock unit is the fix where holding matters.
The front flange is already part of the F-version body, so machine mounting takes four bolts and no purchased accessory. At 15 mm of stroke, side-load risk is minimal, but keep the M12x1.25 rod thread aligned with whatever tool or flag you fit.
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 MARF40X15S FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; push 879.6 N and pull 738.9 N at 0.7 MPa; 128.1 kgf theoretical maximum at 1.0 MPa. Bore 40 mm, stroke 15 mm, 1/8" ports, and a 16 mm rod with M12x1.25 male thread.
Short strokes cut cycle time and keep the rod inside a tight fixture. Speed still spans 30-800 mm/s and both-end variable cushions stay adjustable, so the piston seats squarely on a detent or flag instead of slamming. For longer feeds, move to a 50 mm or 100 mm stroke in the same 40 mm bore.
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