Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø25mm bore and 40mm 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.
- BoreØ25 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S
A 40 mm throw suits close-packed fixtures, and the MARF25X40S delivers it in a 25 mm double-acting round body with variable cushioning at both ends. Its front-flange bracket is integral, saving the cost and stack height of a separate flange. Rated 245.3 N push at 0.5 MPa on 0.15-1.0 MPa (22-145 psi) air, it cycles at 30-800 mm/s.
The riveted stainless barrel and hard-chrome plated rod tolerate splash and occasional washdown far better than painted minis. Size the task at about 147 N of continuous push, roughly a 12 kg vertical lift with a 2:1 margin, and the standard magnet works with CMSG, DMSG and EMSG switches straight from stock.
Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MARF25X40S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 25 | Bore size in mm. |
| ×40 | 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 MARF25X40S Is Used
Drill-fixture clamp
Clamps small brackets beside a drilling spindle; the short 40 mm stroke keeps the clamp out of chip flow and the cushion avoids marking the part.
Sample pusher
Advances sample cups into a lab analyser pickup station, where the stainless body copes with daily wipe-downs and spilled reagents.
Die eject pin
Kicks light stampings out of a small die; 245.3 N at 0.5 MPa is ample for thin aluminium blanks.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X40S the Right Cylinder?
If 245 N at 0.5 MPa is generous for your clamp, the 20 mm bore at about 157 N saves air; if you need more, the 32 mm bore reaches 402.2 N. Rod is 10 mm, threaded M10x1.25, with 1/8 inch ports.
Position is not held if the air supply drops; the piston will drift, so fit a rod lock where the load must stay clamped through a power cut. The integrated F flange bolts the body directly to the fixture, no separate foot or flange accessory, and the built-in magnet is standard, not an option.
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 MARF25X40S FAQ
The 25 mm bore pushes 245.3 N and pulls 206.1 N at 0.5 MPa. At 0.7 MPa those become 343.4 N and 288.5 N, and theoretical maximum output is 50 kgf at 1.0 MPa. Ports are 1/8 inch on both covers.
Needle screws at both ends meter the exhaust, so even a 40 mm cycle ends softly. Adjust them on first run: close slightly for heavier parts, open for speed. Cushioning protects the aluminium covers at the top of the 30-800 mm/s speed band.
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 MARF25X40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.