Airtac MARF Stainless Steel Mini Air Cylinder MARF40X25S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF40X25S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 MARF40X25S
A short 25 mm stroke version of the MAR front-flange mini cylinder, this bore 40 unit is double acting with a variable cushion at both ends and carries its own integrated mounting bracket, so it bolts to a machine face without a separate flange or foot. At 0.5 MPa it delivers 628.3 N on the extend stroke and 527.8 N retracting, driven by filtered air at 0.15-1.0 MPa (22-145 psi).
The stainless round barrel and hard-chrome plated rod (carbon steel, 20 um chrome) shrug off mild corrosion and washdown better than painted minis in damp or food-line spots. Plan real work at roughly 377 N per cycle - about 60 percent of the 0.5 MPa push rating - or match it to a vertical lift of about 32 kg with a 2:1 margin. The standard magnet accepts CMSG / DMSG / EMSG switches for end-of-stroke sensing.
Airtac MARF Stainless Steel Mini Air Cylinder MARF40X25S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF40X25S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MARF40X25S
| 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. |
| ×25 | 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 MARF40X25S Is Used
Clamp fixture on a CNC jig
A 25 mm stroke suits swing clamps and drill jigs where 377 N of practical clamping force holds an aluminium housing against a hard stop.
Reject gate on a bottling line
The front flange bolts straight to a chute wall; 628 N at 0.5 MPa kicks underweight bottles off a conveyor, and the cushion stops the gate slamming.
Pick-confirm on an assembly press
Standard magnet plus CMSG switches signals full retraction before a press cycle starts, cutting misloaded-part faults on a fast rotary table.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X25S the Right Cylinder?
Between bores: a MAR 25 bore pushes 245.3 N at 0.5 MPa, so this 40 mm unit roughly doubles that; stepping up to 50 mm gives 981.3 N if 628 N is marginal. With no air applied the piston drifts freely - the cushion only softens the stroke ends, not a lock - so add a rod lock if the load must stay put. I and Y rod knuckles still fit the M12x1.25 male rod thread, and the 1/8" port takes PT, G or NPT.
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 MARF40X25S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa, 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Run it on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, temperature -20 to +70 C.
No - like every plain double-acting mini cylinder it drifts when air is lost; the variable cushion only eases the last few millimetres at each end. For load holding order a separate rod lock. Mounting needs no extra bracket: the F-version front flange is built in, and the 16 mm rod carries M12x1.25 threads for I or Y knuckles.
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