Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-75S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-75S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MFCJ20X80-75S
Trim the extend stroke by up to 75 mm on site with the MFCJ20X80-75S, a JIS-standard round-body mini cylinder built for high-speed changeovers. A needle variable air cushion at both ends soaks up end-of-stroke shock, while the SUS304 stainless barrel and riveted aluminium covers resist mild washdown.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, this double-acting 20 mm bore generates 157 N of push force at 0.5 MPa. That translates to a safe working load of about 94 N, lifting roughly 8 kg vertically with a 2:1 margin. The -S suffix adds a piston magnet for CMSG, DMSG or EMSG switches, and the body is shorter than an ISO 6432 cylinder for the same stroke.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-75S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-75S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MFCJ20X80-75S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MFCJ20X80-75S Is Used
Lightweight Probe Positioning
Dial in the extend stroke within the 75 mm window for delicate test probes, using the variable air cushion to decelerate the 157 N thrust gently before contact.
Small Parts Diverting
Adjust the reach on the fly for varying product sizes on a conveyor, relying on the 1/8" port and cushioned stops to keep the 8 kg vertical lift cycle smooth.
Compact Assembly Pushing
Fit the shorter-than-ISO-6432 body into tight machine cells, fine-tuning the extend end and needle cushion to push light sub-assemblies without bounce.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-75S the Right Cylinder?
When sizing this adjustable-stroke family, compare the real thrust: this 20 mm bore pushes with 157 N at 0.5 MPa, while stepping up to the MFCJ25 yields 245.3 N. Choose the 20 mm bore for lighter, high-speed trial fits where you need to tune both the extend end position and the cushion needle to prevent shock. The adjuster only shortens the extend stroke; it does not lock the piston mid-travel.
Because a plain cylinder drifts on air loss, add an external rod lock or pilot check valve if the load must be held. Mounting options include LB foot, FA flange and TC trunnion (no SDB or back cover). The built-in -S magnet enables CMSG, DMSG or EMSG sensors for position confirmation.
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 MFCJ20X80-75S FAQ
This 20 mm bore cylinder has an 1/8" port and a 12 mm rod. It pushes with 157 N and pulls with 131.9 N at 0.5 MPa; at 0.7 MPa it pushes 219.8 N and pulls 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa, and the operational speed ranges from 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 75 mm, giving a usable extend range of 5-80 mm; the retract stroke remains full. The variable air cushion at both ends uses a needle to decelerate the piston near the end of travel, reducing shock. It is not a brake or lock, so the piston will drift if air pressure is lost.
Authorized Export Seller
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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