Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50S 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 MFJ40X200-50S
Trim the extend position by up to 50 mm directly at the machine with this 40 mm bore adjustable-stroke cylinder, avoiding the need to swap units or rig external stops. As a JIS-standard round-body mini, the SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length while resisting mild washdown.
Driven by filtered air at 0.15 to 1.0 MPa through a 1/4" port, the 16 mm rod delivers 628.3 N of push force at 0.5 MPa. That equates to a safe working load of roughly 377 N, or the ability to lift about 32 kg vertically with a 2:1 margin. The -S suffix adds a piston magnet for position sensing, and fixed TPU bumpers absorb end-of-stroke impact.
Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50S |
|---|---|
| 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 MFJ40X200-50S
| 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 MFJ40X200-50S Is Used
Changeover Stations
Dial in the exact extend position during product format changes using the 50 mm adjuster, perfectly matching the 628.3 N push force to shift heavy guide rails without replacing hardware.
Prototype Set-up Rigs
Safely test end-of-travel limits on new assemblies by shortening the stroke on the fly, leveraging the 32 kg vertical lift capacity to trial different pushing depths.
Variable-Position Stops
Replace fixed dead-stops with an adjustable physical end for 40 mm bore tooling, letting operators fine-tune the contact point within the 150 to 200 mm usable extend range.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X200-50S the Right Cylinder?
When sizing this series, compare the two available bores directly: the 40 mm bore chosen here provides 628.3 N push at 0.5 MPa, whereas stepping down to an MFJ32 yields 402.2 N. Choose the 40 mm if your trial fits or changeover stations need to move heavier fixtures within that 50 mm adjustment window. Both options use the same 1/4" porting and operate between 30 and 800 mm/s.
Mount this unit using LB foot, FA flange, or TC trunnion brackets, as the adjustable-stroke build omits the SDB and rear cover options. The included -S magnet supports CMSG, DMSG, and EMSG switches. Remember that the external adjuster only sets the extend end position; it is not a mid-stroke lock, and the cylinder will drift on air loss. For suspended loads, 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 MFJ Adjustable Mini Cylinder MFJ40X200-50S 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.
The external adjuster shortens the extend stroke by up to 50 mm on-site, giving a usable extend range of 150 to 200 mm; retract remains full. The -S suffix means a piston magnet is built-in for CMSG, DMSG, or EMSG sensors. Fixed TPU bumpers decelerate the stroke end, but this is not an adjustable air cushion.
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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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