Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 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 MARF40X400S
Four hundred millimetres of travel from a 40 mm round-body mini: the MARF40X400S extends with 628 N and retracts with 528 N at 0.5 MPa, reaching 880 N at 0.7 MPa. Double acting with a variable cushion at each end, it carries its own front flange rolled into the cover, so no loose foot or add-on bracket is needed. The stainless barrel and hard-chrome 16 mm rod stand up to humidity and light washdown far better than painted mini cylinders.
At 628 N theoretical push, budget around 377 N for real work at 0.5 MPa, or count on roughly 32 kg of vertical lift with a 2:1 margin. The standard piston magnet pairs with CMSG, DMSG and EMSG switches, and with speed anywhere in the 30-800 mm/s band you can run the long stroke briskly while the cushions absorb the end stop. Supply pressure spans 0.15-1.0 MPa (22-145 psi).
Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MARF40X400S
| 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. |
| ×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 MARF40X400S Is Used
Full-layer bottle ejection
A 400 mm pusher travel clears a whole layer of bottles from a rinse-tunnel conveyor in one stroke, with cushions softening the return.
Lifting gate actuation
With about 32 kg of vertical-lift equivalent at a 2:1 margin, it raises light gates and diverters on packaging and filling lines.
Sheet blank push-off
Long, cushioned travel pushes sheet metal blanks off a stacker table in fabrication shops while the stainless barrel tolerates coolant mist.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S the Right Cylinder?
For a 400 mm stroke keep the rod side-loading low; with a 16 mm rod, guide long or overhung loads externally so the front bushing and rod stay straight. Downsize to the 32 mm MAR (402 N at 0.5 MPa) for lighter pushes, or move to the 50 mm bore (981 N) when close to double the force is needed. Expect the piston to drift if air supply drops - MAR has no holding function, so a rod lock is the fix for suspended loads. CMSG / DMSG / EMSG switches read position off the built-in magnet along the full travel.
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 MARF40X400S FAQ
Push is 628.3 N and pull 527.8 N at 0.5 MPa, climbing to 879.6 N push and 738.9 N pull at 0.7 MPa, with a 128.1 kgf theoretical ceiling at 1.0 MPa. Spec highlights: 40 mm bore, 400 mm stroke, 16 mm rod with M12x1.25 thread, 1/8" port, 0.15-1.0 MPa (22-145 psi) operating range and 30-800 mm/s speed.
Yes - within the 30-800 mm/s band. Open the needle screws at both end covers on commissioning so the variable air cushions absorb the stop, then dial them in until the rod lands without bounce. Keep side loads off the 16 mm rod over this travel and guide external loads separately.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MARF Stainless Steel Mini Air Cylinder MARF40X400S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.