Airtac MFCJ Adjustable Mini Cylinder MFCJ40X125-10
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X125-10 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 MFCJ40X125-10
Tune extend travel on-site with the AirTAC MFCJ40X125-10, a JIS-standard round-body mini cylinder featuring a 10 mm adjustable window (usable extend 115-125 mm) and needle-set variable air cushions at both ends. The SUS304 stainless steel barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit while resisting mild washdown corrosion.
Driven by a 1/4" port and a 16 mm rod (M14x1.5 male thread), this double-acting 40 mm bore generates 628.3 N push and 527.8 N pull at 0.5 MPa. For sizing, its safe working load is roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X125-10 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X125-10 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MFCJ40X125-10
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MFCJ40X125-10 Is Used
High-Speed Component Pressing
Dial in the exact 115-125 mm extend position for seating bearings, relying on the variable air cushion to absorb the 879.6 N push force shock at 0.7 MPa without slamming.
Adjustable Package Diverter
Fine-tune the actuator reach on the fly during product changeovers; the 10 mm adjuster sets the exact push distance while the cushion softens high-speed redirection impacts.
Vertical Lift Gate
Lift gates weighing about 32 kg using the 628.3 N push force at 0.5 MPa, adjusting the extend end-point to match varying pallet heights smoothly.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X125-10 the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when you need heavy push force: the 40 mm bore delivers 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm bore. The 10 mm adjustable window and dual variable air cushions make it perfect for high-speed changeovers where end-of-stroke shock must be tuned out during trial fits.
Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover option exists). Because this specific SKU has no -S magnet, position sensing is unavailable. Remember that the air cushion only decelerates the piston near stroke end; it is not a brake. To hold a load vertically 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 MFCJ40X125-10 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, and a theoretical max of 128.1 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. The external adjuster shortens the extend stroke by up to 10 mm (usable range 115-125 mm), while the needle variable air cushions at both ends decelerate the piston near stroke end. The cushion is not a 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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