Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 35mm 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.
- BoreØ20 mm
- Stroke35 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S
A compact front-flange round-body cylinder for short clamping moves: MARF20X35S is double acting with a variable air cushion at both ends, and the flange is already riveted into the front cover, so there is no separate bracket to buy or align. At 0.5 MPa the 20 mm bore pushes 157 N and pulls 132 N, and the cushion needles let you soften the 35 mm stroke so you can run faster without hammering the covers.
The stainless barrel and hard-chrome plated rod tolerate washdown and damp air far better than painted minis, and because the magnet is built in as standard, CMSG, DMSG or EMSG switches clip straight on. In practice, plan on roughly 94 N of usable force at 0.5 MPa, which is enough to lift about 8 kg vertically with margin.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MARF20X35S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 20 | Bore size in mm. |
| ×35 | 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 MARF20X35S Is Used
Bottle capping hold-down
A 35 mm stroke is ideal for a hold-down pad on a small bottling table, pressing a cap square while the glue sets; 157 N at 0.5 MPa does the job from a typical 0.4-0.5 MPa line.
Drill jig fixture clamp
Clamp thin aluminium plates to a drill jig; about 94 N of working force keeps the sheet flat without marking, and the front flange bolts the cylinder straight to the jig plate.
Reject pusher with sensing
Fit a CMSG switch to confirm full extension and push off-spec parts off a mini conveyor; the built-in magnet is standard, no special piston is needed.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X35S the Right Cylinder?
There is nothing smaller than 20 mm in the MAR range, so if 157 N at 0.5 MPa feels marginal, step up to the 25 mm bore, which gives 245 N at the same pressure; the same 20 mm bore reaches 220 N push at 0.7 MPa. Ports are 1/8", the 8 mm rod carries an M8x1.25 male thread, and I or Y rod knuckles fit directly. Note that the cylinder drifts if air pressure is lost - the cushion softens stroke ends only, it is not a brake. A 35 mm stroke sits well inside the 500 mm standard limit for this bore, running at 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 MARF20X35S FAQ
At 0.5 MPa it pushes 157 N and pulls 132 N; at 0.7 MPa, 220 N push and 185 N pull. The theoretical maximum is 32 kgf at 1.0 MPa. Bore is 20 mm, rod 8 mm with M8x1.25 thread, port 1/8", operating pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, stroke 35 mm standard.
No on both counts. The F front flange is riveted into the front cover as part of the rolling-packed body, and every MAR cylinder carries the magnet as standard, so CMSG, DMSG or EMSG switches mount without special ordering.
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