Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S
With a 100 mm on-site adjustment window, this 40 mm bore cylinder lets you fine-tune the extend stroke down to zero while keeping a full 80 mm retract. The variable air cushion at both ends uses needle valves to decelerate high-speed loads smoothly, making it ideal for shock-sensitive changeovers. Its JIS-standard round-body construction is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length in tight machine frames.
The SUS304 stainless barrel shrugs off mild corrosion and washdown splashes, while the built-in -S magnet enables CMSG, DMSG, or EMSG position sensing. At 0.5 MPa, this bore delivers 628.3 N push and 527.8 N pull, so a safe working load of about 377 N is realistic - roughly 32 kg lifted vertically with a 2:1 safety margin. The 1/4" port keeps plumbing simple, and the riveted aluminium covers keep the whole package lightweight.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (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 MFCJ Adjustable Mini Cylinder MFCJ40X80-100S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | 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 MFCJ40X80-100S Is Used
High-Speed Changeover Setup
Dial in the extend stroke from 0 to 80 mm on-site using the 100 mm adjuster window while the variable cushion tames end-of-stroke impact at speeds up to 800 mm/s. Perfect for production lines that switch product sizes frequently.
Shock-Sensitive Assembly
The needle-set air cushion at both ends decelerates the 628.3 N push force smoothly, protecting delicate components from impact damage during high-speed assembly operations. Fine-tune the cushion to match each cycle.
Compact Machine Integration
The JIS round-body design is shorter than ISO 6432 cylinders for the same 40 mm bore and 80 mm stroke, letting you fit this actuator into tight frames while still getting the 100 mm stroke adjustment flexibility.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-100S the Right Cylinder?
Choose MFCJ40X80-100S when you need 628.3 N of push force at 0.5 MPa and want to dial in the exact extend position on-site. Compare with the MFCJ32 bore, which offers 402.2 N push at the same pressure - if your application needs more than 400 N, the 40 mm bore is the right call. The 100 mm adjustment window suits high-speed changeovers where trial fits and shock tuning happen frequently.
For loads that must stay put when air pressure drops, remember this cylinder does not lock - the piston drifts on air loss. Add an external rod lock or pilot-operated check valve for position holding. Mount with LB foot, FA flange, or TC trunnion brackets, and pair with CMSG, DMSG, or EMSG switches since the -S magnet is already fitted.
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 MFCJ40X80-100S FAQ
At 0.5 MPa, push force is 628.3 N and pull is 527.8 N. At 0.7 MPa, push rises to 879.6 N and pull to 738.9 N. Theoretical maximum is 128.1 kgf at 1.0 MPa. The 16 mm rod with M14x1.5 thread handles these loads, and the 1/4" port delivers adequate flow for speeds up to 800 mm/s.
The external adjuster shortens the extend end by up to 100 mm, so you can set any extend stroke from 0 to 80 mm on-site - retract always remains full. The -S magnet enables CMSG, DMSG, or EMSG sensors to track piston position anywhere in the adjusted range, giving you flexible end-position detection without mechanical stops.
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