Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-100
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-100 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 MFCJ40X250-100
Tune both the extend end-point and the end-of-stroke shock directly on the machine with this 40 mm bore, 250 mm base stroke cylinder. The external adjuster shortens the forward stroke by up to a 100 mm window (yielding a 150-250 mm usable extend), while the needle variable air cushion at both ends soaks up high-speed kinetic energy for smooth deceleration.
Built as a JIS-standard round-body mini with a SUS304 stainless barrel and riveted aluminium covers, it packs a 16 mm rod, an M14x1.5 male thread, and a 1/4" port into a footprint shorter than a comparable ISO 6432 unit. Delivering 628.3 N push force at 0.5 MPa, it handles a safe working load of roughly 377 N or lifts about 32 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-100 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-100 |
|---|---|
| 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 MFCJ40X250-100
| 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 MFCJ40X250-100 Is Used
High-Speed Diverters
Pushes packages with 628.3 N force at 0.5 MPa while the 100 mm stroke window and needle air cushion allow precise, shock-free tuning during rapid conveyor changeovers.
Carton Forming Presses
Dials in the exact 150 to 250 mm fold depth on the fly, using the variable cushion to arrest the 879.6 N push force at 0.7 MPa smoothly without denting the cardboard.
Light Milling Clamps
Holds workpieces securely under a 377 N safe working load, adjusting the extend position to accommodate different part heights while absorbing rapid clamping shock.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X250-100 the Right Cylinder?
Weigh the MFCJ40 against the MFCJ32 by comparing thrust: the 40 mm bore yields 628.3 N push and 527.8 N pull at 0.5 MPa, whereas the 32 mm bore provides 402.2 N push. Choose the 40 mm bore when moving heavier masses at high speed, as the adjustable 100 mm stroke window lets you dial in the exact extend position during changeovers, and the variable air cushion arrests shock without needing fixed bumpers.
For mounting, select LB foot, FA flange, or TC trunnion brackets (there is no SDB or back-cover option on this build). Because this specific SKU has no -S magnet, position sensing is unavailable; add the -S option if you require CMSG, DMSG, or EMSG switches. Finally, remember the air cushion only decelerates the piston near the stroke end—it is not a brake. To prevent drift 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 MFCJ40X250-100 FAQ
This 40 mm bore cylinder features a 1/4" port, a 16 mm rod, and an M14x1.5 male thread. It delivers 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. Operating pressure is 0.15-1.0 MPa, and speed ranges from 30-800 mm/s.
No, this specific SKU lacks the -S magnet, meaning it cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for position sensing. The external adjuster shortens the extend stroke by up to 100 mm, and the variable air cushion at both ends handles deceleration, but neither feature acts as a mid-stroke lock or brake.
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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