Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30 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 MFCJ40X80-30
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ40X80-30. This JIS-standard round-body mini cylinder features a 30 mm adjustable extend window (usable 50-80 mm) paired with needle-set variable air cushions at both ends. The SUS304 stainless steel barrel and riveted aluminium covers deliver a shorter mounting envelope than an ISO 6432 unit, resisting mild washdown.
As a double-acting 40 mm bore unit, it provides 628.3 N push and 527.8 N pull at 0.5 MPa. For sizing, this translates to a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. It uses a 1/4" port and a 16 mm rod. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30 |
|---|---|
| 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 MFCJ40X80-30
| 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 MFCJ40X80-30 Is Used
High-Speed Press Feed
Tune the 30 mm extend window to set strip contact, relying on the variable air cushion to absorb the 628.3 N push force shock during rapid 800 mm/s cycling.
Package Divert Stroke
Adjust the extend endpoint on-site for varying box sizes; the 40 mm bore provides sure 527.8 N pull to retract the diverter smoothly under cushioned control.
Pallet Stopper Gate
Set the exact stop position for mixed pallet heights. The SUS304 barrel handles damp environments while lifting roughly 32 kg loads safely.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30 the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when you need heavier push force: the 40 mm bore yields 628.3 N at 0.5 MPa versus 402.2 N for the 32 mm. The external adjuster is perfect for trial fits and changeovers where the exact extend endpoint must be tuned on-site, while the variable air cushion handles high-speed 30-800 mm/s deceleration without slamming.
Mount via LB foot, FA flange or TC trunnion (there is no SDB or back-cover option). Because this plain cylinder lacks a -S magnet, position sensing is unavailable. The cushion only decelerates the piston near stroke end—it is not a brake. If you must hold a load on air loss, install an external rod lock or pilot check valve.
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 MFCJ40X80-30 FAQ
This 40 mm bore cylinder has a 1/4" port and a 16 mm rod. At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external adjuster shortens the extend stroke by up to 30 mm on-site; retract remains full. The variable air cushion at both ends only decelerates the piston near stroke end and is not a lock. This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC MFCJ Cylinders
Request a Quote for Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.