Airtac MFCJ Adjustable Mini Cylinder MFCJ40X40-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X40-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MFCJ40X40-30S
Tune both the extend end-point and the end-of-stroke shock on-site with this 40 mm bore JIS-standard round-body mini cylinder. The external adjuster shortens the extend stroke by up to 30 mm (usable 10-40 mm), while the needle variable air cushion at both ends soaks up high-speed kinetic energy for smooth, quiet motion. A built-in magnet (-S) enables CMSG, DMSG, or EMSG switches for position sensing.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown, and the body is shorter than an ISO 6432 cylinder for the same bore and stroke, saving mounting length. Delivering 628.3 N push force at 0.5 MPa via a 1/4" port, it yields a safe working load around 377 N, lifting about 32 kg vertically with a 2:1 margin. The M14x1.5 male rod thread handles robust actuation tasks.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X40-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X40-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MFCJ40X40-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MFCJ40X40-30S Is Used
High-Speed Forming Press
Dial in the 10-40 mm extend stroke and set the needle cushion to absorb shock when pushing parts into a die at high speed.
Product Divertor Gate
Adjust the extend end-point on the fly for different carton sizes while relying on the 628.3 N push force to hold the gate firm.
Filler Nozzle Lowering
Fine-tune the nozzle descent depth for various bottle heights, using the -S magnet and DMSG switch to confirm the fill position.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X40-30S the Right Cylinder?
Choose this MFCJ40 model over the smaller MFCJ32 when you need more push force—628.3 N versus 402.2 N at 0.5 MPa. The 30 mm adjustable window is perfect for high-speed changeovers or trial fits where the exact extend position and end-of-stroke shock both need field tuning. Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover option exists).
Remember that the air cushion only decelerates the piston near the stroke end; it is not a lock or brake. If the application must hold a load on air loss or when the valve is centered, add an external rod lock or pilot-operated check valve, as the piston will drift otherwise.
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 MFCJ40X40-30S FAQ
This 40 mm bore cylinder uses a 1/4" air port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm on-site, giving a usable 10-40 mm extend window, while the retract stroke remains full. The variable air cushion at both ends decelerates the piston near stroke end for smooth stops, but it does not lock or hold the load. The -S suffix means it has a built-in magnet for 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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