Airtac MARF Stainless Steel Mini Air Cylinder MARF40X20S
The AirTAC MARF Stainless Steel Mini Air Cylinder MARF40X20S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X20S
Short 20 mm travel makes the MARF40X20S a natural fit for clamp and locate jobs where the front flange sits directly on the fixture. This 40 mm double-acting mini cylinder pushes 628.3 N and pulls 527.8 N at 0.5 MPa, with a variable air cushion trimming each end of the tight stroke.
The stainless round tube, riveted covers and hard-chrome 16 mm rod hold up in splash zones where painted bodies flake. The magnet is fitted as standard, so CMSG / DMSG / EMSG switches sense the 20 mm stroke ends without any modification.
Airtac MARF Stainless Steel Mini Air Cylinder MARF40X20S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF40X20S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MARF40X20S
| 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. |
| ×20 | 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 (double rod, 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 MARF40X20S Is Used
Drill jig workpiece clamps
Clamping parts in drilling jigs and small fixtures; a 20 mm squeeze is all a hardened clamp pad needs, and 628 N holds parts solid during drilling.
Rising locating pins
Raising and lowering a locating pin in a machining fixture, with the flanged cover bolted straight to the fixture body and sensors confirming pin position.
Die ejector strokes
Ejecting small stamped or molded parts from a die over a 20 mm kick, where the cushion prevents the ejector plate from slamming home.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF40X20S the Right Cylinder?
For smaller clamp forces the 25 mm MARF pushes 245.3 N at 0.5 MPa; for heavy tooling clamps step up to the 63 mm bore at 1557.9 N. Even over 20 mm, check concentricity with the clamp pad - misalignment here loads the rod edge-on and shortens seal life. If air is lost, the piston releases, so anything that must stay clamped through shutdown needs a rod lock cylinder or an external latch. PT ports are standard with G and NPT optional; keep cycle speed inside 30-800 mm/s.
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 MARF40X20S FAQ
Push is 628.3 N and pull 527.8 N at 0.5 MPa; at 0.7 MPa expect 879.6 N push and 738.9 N pull, with a theoretical ceiling of 128.1 kgf at 1.0 MPa. Operating pressure window is 0.15-1.0 MPa (22-145 psi) on 40 um filtered air.
It means the flange is machined into the front cover, so no separate foot or bracket is bought or aligned - the cylinder bolts straight to the fixture. I or Y rod knuckles still thread onto the M12x1.25 rod end when a swinging coupling is needed.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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