Airtac MARF Stainless Steel Mini Air Cylinder MARF25X650S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF25X650S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø25mm bore and 650mm 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
- Stroke650 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 MARF25X650S
Long-travel work on a small bore: MARF25X650S pushes a load 650 mm with 245 N at 0.5 MPa (206 N pull), running double-acting with a variable cushion at each end and a speed window of 30-800 mm/s. The 650 mm stroke is above the 500 mm standard limit for this bore, so the unit is produced to order.
The front flange is riveted into the front cover as part of the rolled body - no separate foot or flange accessory is required. A hard-chrome 10 mm rod inside a stainless barrel resists corrosion in damp plants, and the standard-fit magnet means CMSG, DMSG or EMSG switches mount anywhere along the travel. Budget about 147 N of working force at 0.5 MPa, enough to lift around 12 kg vertically with a 2:1 margin.
Airtac MARF Stainless Steel Mini Air Cylinder MARF25X650S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF25X650S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 650 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 MARF25X650S
| 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. |
| ×650 | 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 MARF25X650S Is Used
Cross-belt carton pusher
Push cartons sideways off a long roller conveyor; 245 N at 0.5 MPa slides a light carton while the 650 mm stroke clears the full lane width.
Sliding machine guard
Open and close a 600 mm sliding guard door on a CNC retrofit; cushion needles stop the door slamming and a DMSG switch proves it is fully shut.
Deep-shelf tote ejector
Eject totes from a deep picking shelf: the long stroke reaches the back of a 650 mm bin while the corrosion-resistant barrel copes with cold-store humidity.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X650S the Right Cylinder?
For a 650 mm reach at moderate force, the 25 mm bore is the sweet spot; move to 32 mm for 402 N push at 0.5 MPa if friction runs higher than expected. Long strokes demand straightness: support or guide the load externally, because side load on the extended 10 mm rod accelerates seal wear. Air loss means drift - the piston has no brake - so spec a rod lock for held positions. G or NPT ports can be ordered in place of the standard PT 1/8".
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 MARF25X650S FAQ
Force at 0.5 MPa is 245 N push / 206 N pull; at 0.7 MPa it is 343 N / 289 N; theoretical maximum 50 kgf at 1.0 MPa. The 650 mm stroke exceeds the 500 mm maximum standard stroke for the 25 mm bore, so it is made to order. Port 1/8", rod thread M10x1.25, pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
No. Like any plain double-acting cylinder, MARF25X650S drifts when air pressure is lost; the variable cushion only softens the stroke ends. Add a rod lock where a raised or positioned load must stay put. The built-in magnet, however, is standard and works with CMSG, DMSG and EMSG switches.
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