Airtac MFCJ Adjustable Mini Cylinder MFCJ20X70-10
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X70-10 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 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 MFCJ20X70-10
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ20X70-10. This double-acting JIS-standard round-body mini cylinder features a 10 mm external adjuster that shortens the extend stroke on site, giving a usable 60-70 mm extend window while retract remains full. Needle-set variable air cushions at both ends soak up end-of-stroke kinetic energy for smooth deceleration.
Built with a SUS304 stainless barrel and riveted aluminium covers, the body is shorter than an ISO 6432 cylinder for the same 20 mm bore and 70 mm stroke, saving valuable mounting length. Generating 157 N push and 131.9 N pull at 0.5 MPa via a 1/8" port, it yields a safe working load of about 94 N. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X70-10 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X70-10 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 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 MFCJ20X70-10
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 MFCJ20X70-10 Is Used
Component Trial Fits
Fine-tune the 60-70 mm extend stroke on the line to perfect part seating, using the needle cushion to prevent bounce on lightweight 8 kg assemblies.
High-Speed Diverter
Rapidly deflect small goods at 30-800 mm/s while the variable air cushion silently absorbs the end-of-stroke shock without shaking the frame.
Carton Flap Folding
Adjust the extend endpoint by up to 10 mm to match varying box heights, letting the 157 N push force tuck flaps smoothly before taping.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X70-10 the Right Cylinder?
Choose the MFCJ20 when your application needs roughly 94 N of safe working force (about 60% of the 157 N push at 0.5 MPa, lifting around 8 kg vertically with a 2:1 margin). If your payload is heavier, step up to the MFCJ25 which provides 245.3 N at 0.5 MPa. Both options feature a 1/8" port and an M8x1.25 male rod thread.
The 10 mm adjustable window is perfect for trial fits and changeovers where the exact extend endpoint and end-of-stroke shock both need tuning. Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover). The cushion only decelerates near stroke end; it is not a lock, so add an external rod lock or pilot check valve if you must hold a load on air loss.
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 MFCJ20X70-10 FAQ
This 20 mm bore cylinder uses a 1/8" port and an M8x1.25 male rod thread. At 0.5 MPa it provides 157 N push and 131.9 N pull. At 0.7 MPa it provides 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for sensing. The 10 mm adjuster only shortens the extend end position, and the variable air cushion decelerates the piston but does not lock the load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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