Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 75mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ20 mm
- Stroke75 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- 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 MFCJ Adjustable Mini Cylinder MFCJ20X75-40
Tune both travel and end-of-stroke shock on site with this double-acting, adjustable-stroke mini cylinder. An external adjuster lets you shorten the extend stroke by up to 40 mm (usable range 35-75 mm), while a needle variable air cushion at both ends soaks up high-speed impact for smooth deceleration. Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, it delivers a push force of 157 N at 0.5 MPa via a 1/8" port.
The compact riveted body is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length in tight machinery. With a safe working load around 94 N (roughly 60% of the 0.5 MPa push figure), it lifts about 8 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
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 MFCJ Adjustable Mini Cylinder MFCJ20X75-40
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 Is Used
Lightweight Component Pressing
Dial in the exact 35-75 mm extend distance for delicate insertions. The variable air cushion absorbs the 157 N push impact, protecting small parts during high-speed actuation.
Package Diverting Stops
Adjust the stopper arm length on the fly for mixed product sizes. The needle cushion ensures quiet, shock-free stops even when cycling at speeds up to 800 mm/s.
Lab Automation Stroke Tuning
Perfect for experimental rigs needing iterative stroke adjustments. The SUS304 stainless barrel resists mild washdown corrosion, and the 40 mm window allows rapid setup changes.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 the Right Cylinder?
Weigh the MFCJ20 against the MFCJ25 by force: the 20 mm bore pushes 157 N at 0.5 MPa, while the 25 mm bore pushes 245.3 N. Choose this 20 mm bore for lighter, high-speed changeovers where exact positioning and end-shock tuning matter. The 40 mm adjustable window is ideal for trial fits where you need to dial in the extend end precisely.
Remember the air cushion only decelerates the piston near the end of travel—it is not a lock or brake. If the load must be held on air loss, add an external rod lock or pilot-operated check valve. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover here). Because this exact SKU has no -S magnet, position sensing is unavailable unless you specify the -S variant.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
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 Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-40 FAQ
This 20 mm bore cylinder features a 1/8" port and an Ø8 mm rod. It generates a push force of 157 N and pull of 131.9 N at 0.5 MPa, and a push of 219.8 N / pull of 184.7 N at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
This specific SKU does not have the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors. The external adjuster shortens the extend stroke by up to 40 mm (usable range 35-75 mm), and the variable air cushion at both ends decelerates the piston near stroke end to reduce shock.
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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.
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Most inquiries answered within 7-8 hours.
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