Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MFCJ40X50-30S
Tune both the extend end-point and end-of-stroke shock on-site with this 40 mm bore adjustable-stroke mini cylinder. The external adjuster shortens the extend stroke by up to 30 mm within a 20-50 mm usable window, while the needle-set variable air cushion at both ends soaks up high-speed kinetic energy for smooth, quiet motion. A built-in piston magnet (-S) enables direct mounting of CMSG, DMSG, or EMSG switches for position sensing.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, the body is intentionally shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. Delivering 628.3 N push force at 0.5 MPa (879.6 N at 0.7 MPa) through a 1/4" port and M14x1.5 male rod thread, it handles robust cycles. For sizing, a safe working load is roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MFCJ40X50-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MFCJ40X50-30S Is Used
High-Speed Component Press
Dial in the exact 20-50 mm extend depth on the fly and use the variable air cushion to absorb the 628.3 N push impact during rapid assembly press fits.
Adjustable Transfer Diverter
Fine-tune the stroke by up to 30 mm to accommodate different package sizes on a 40 mm bore line, relying on the needle cushion to prevent end-cap slamming at 800 mm/s.
Vertical Lift Gate
Lifts about 32 kg safely using the 0.5 MPa push force, while the SUS304 stainless barrel resists mild washdown humidity in distribution hubs.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-30S the Right Cylinder?
When choosing between the two available bores, match your dynamic load to the thrust curves: this MFCJ40 delivers 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 provides 402.2 N. Select the 40 mm bore if your trial-fit changeovers or high-speed transfers need that extra force margin, and rely on the 30 mm adjustable window to dial in the exact extend position without swapping cylinders. The variable air cushion is ideal for shock-sensitive setups, allowing you to tune the deceleration needle at each end.
For mounting, choose from LB foot, FA flange, or TC trunnion (there is no SDB or back-cover option on this build). The -S magnet on this SKU supports CMSG/DMSG/EMSG sensors; a non-S SKU cannot take a sensor. Remember that the air cushion only decelerates the piston near the stroke end—it is not a brake. If the machine loses air, the piston will drift, so install an external rod lock or pilot check valve to hold a suspended load.
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 MFCJ40X50-30S FAQ
This 40 mm bore double-acting cylinder uses a 1/4" port and an M14x1.5 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 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 (usable range 20-50 mm), and the variable air cushion at both ends decelerates the piston near stroke end for smooth stops. The -S magnet enables CMSG/DMSG/EMSG sensors. The cushion is not a lock; the piston drifts on air loss, so use an external rod lock to hold loads.
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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