Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-75S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-75S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MFCJ40X250-75S
Dial in exact extend positions and absorb high-speed shocks with the AirTAC MFCJ40X250-75S. This JIS-standard round-body mini cylinder features a 75 mm adjustable window, allowing you to shorten the nominal 250 mm extend stroke on-site, while the needle-set variable air cushion at both ends ensures smooth deceleration.
Built with a SUS304 stainless steel barrel and riveted aluminium covers, it delivers 628.3 N of push force at 0.5 MPa through a 1/4" port. It yields a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. The -S suffix equips it for CMSG, DMSG, or EMSG sensors, and its body is shorter than a comparable ISO 6432 unit, saving valuable mounting length.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-75S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-75S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MFCJ40X250-75S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MFCJ40X250-75S Is Used
High-Speed Sorting Diverter
Tunes the 75 mm extend window to hit moving boxes precisely while the variable air cushion halts the 628.3 N push force smoothly at 800 mm/s.
Adjustable Carton Sealing Press
Dials in the exact 175 to 250 mm downstroke for various flap heights, relying on the needle cushion to prevent harsh slams during rapid cycling.
Automated Tool Trial Fits
Provides a 377 N safe working load for delicate component seating, letting operators fine-tune the extend endpoint during machine commissioning.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-75S the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when you need extra muscle: the 40 mm bore pushes 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm variant. The external adjuster and dual variable air cushions make this cylinder perfect for high-speed changeovers and shock-sensitive trial fits where both the end position and deceleration require tuning. Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Remember that the cushion only decelerates the piston; it does not hold the load. To prevent drift on air loss, add 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 MFCJ40X250-75S FAQ
This 40 mm bore cylinder uses a 1/4" 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, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 75 mm on-site, while the variable air cushion at both ends decelerates the piston near the end of travel. The cushion is not a lock or brake; for load holding on air loss, install an external rod lock or pilot check valve. The built-in magnet (-S) supports CMSG, DMSG, and 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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