Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 200mm 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
- Stroke200 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
- 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 MFJ Adjustable Mini Cylinder MFJ40X200-50
Trimming the extend end by up to 50 mm on site, this double-acting JIS-standard round-body mini cylinder lets you dial in the 200 mm stroke without buying a new unit or adding external stops. The riveted aluminium covers and SUS304 stainless barrel yield a shorter overall length than an ISO 6432 build of the same size, resisting mild washdown while saving mounting space.
In the 40 mm bore class, it delivers 628.3 N of push force at 0.5 MPa (527.8 N pull) using a 1/4" port and a 16 mm rod with an M14x1.5 male thread. With a 2:1 safety margin, it lifts about 32 kg vertically, giving a safe working load near 377 N. Fixed TPU bumpers absorb the end impacts, and because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG switches.
Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed TPU bumper pads |
| 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 MFJ Adjustable Mini Cylinder MFJ40X200-50
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 MFJ Adjustable Mini Cylinder MFJ40X200-50 Is Used
Changeover Stations
Dial in the extend position during product format changes, using the 50 mm window to shift the stop point without machining new hard stops.
Prototype Set-up Rigs
Leverage the 628.3 N push force to test actuation distances on the fly, finding the exact 150 to 200 mm extension before finalizing the design.
Variable-Position Stops
Adjust the end point on the production line to handle varying part sizes, relying on the fixed TPU bumpers to cushion the final impact.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50 the Right Cylinder?
Choose the MFJ40 over the MFJ32 when you need more muscle: the 40 mm bore pushes 628.3 N at 0.5 MPa, whereas the 32 mm bore tops out at 402.2 N. The 50 mm adjustable window here is ideal for trial fits and line changeovers where the exact extend position is not final, letting you fine-tune the usable 150 to 200 mm stroke on the fly.
For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB and back-cover options are absent on this build). Remember that the adjuster only sets the end position; it is not a mid-stroke lock, and the cylinder will drift on air loss. To hold a load securely, install an external rod lock or pilot check valve. If you need position sensing, switch to the -S magnet variant.
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 MFJ Adjustable Mini Cylinder MFJ40X200-50 FAQ
This 40 mm bore cylinder uses a 1/4" port and a 16 mm rod. 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.
An external adjuster shortens the extend stroke by up to 50 mm on site, so the usable extension is 150 to 200 mm. Retract remains full length. Fixed TPU bumper pads decelerate the impact at the stroke end. Note this SKU has no -S magnet, so it cannot take position sensors.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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