Airtac MFJ Adjustable Mini Cylinder MFJ40X200-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X200-30 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 MFJ40X200-30
Trimming the extend stroke by up to 30 mm on site, the AirTAC MFJ40X200-30 lets you dial in the exact end position between 170 and 200 mm without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless steel barrel and riveted aluminium covers, giving you a shorter mounting envelope than an ISO 6432 unit for the same 40 mm bore and 200 mm stroke.
Delivering 628.3 N of push force and 527.8 N of pull force at 0.5 MPa, it fits medium-duty positioning tasks perfectly; a practical safe working load is roughly 377 N, lifting about 32 kg vertically with a 2:1 margin. The 1/4" port and M14x1.5 male rod thread match the 16 mm piston rod, while fixed TPU bumper pads decelerate the stroke ends. Note this SKU lacks a magnet, so it cannot take CMSG, DMSG, or EMSG sensors without switching to the -S variant.
Airtac MFJ Adjustable Mini Cylinder MFJ40X200-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X200-30 |
|---|---|
| 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 MFJ40X200-30
| 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 MFJ40X200-30 Is Used
Changeover Stations
Fine-tune the 170 to 200 mm extend position during format changeovers on packaging lines, using the 30 mm adjuster to set stops precisely without swapping hardware.
Trial Fit Rigs
Leverage the 628.3 N push force to press parts into fixtures during prototyping, dialing back the stroke in 1 mm increments until the exact insertion depth is found.
Variable Position Stops
Actuate medium-duty gates or diverter arms where the exact contact point varies by product run, relying on the SUS304 barrel to resist mild washdown splashes.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X200-30 the Right Cylinder?
When sizing this series, compare the two available bores directly: the MFJ40 shown here provides 628.3 N of push at 0.5 MPa, whereas the smaller MFJ32 delivers 402.2 N. Choose the 40 mm bore if your trial fits or line changeovers involve moving heavier jigs, and use the 30 mm external adjuster to fine-tune the extend end safely within the 170 to 200 mm window. Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option here).
Remember that fixed TPU bumpers only decelerate the stroke end; they do not lock the piston. If air pressure drops, the load will drift, so fit an external rod lock or pilot-operated check valve for vertical or suspended loads. Because this exact code has no -S magnet, it cannot support position sensing.
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 MFJ40X200-30 FAQ
This 40 mm bore double-acting 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, or 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical max of 128.1 kgf at 1.0 MPa. Operating speed ranges from 30 to 800 mm/s.
An external adjuster shortens the extend stroke by up to 30 mm on site, allowing a usable extend range of 170 to 200 mm (retract remains full). Fixed TPU bumper pads decelerate the piston at the stroke ends but do not act as a lock; the cylinder drifts on air loss. This specific SKU has no magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
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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.
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Most inquiries answered within 7-8 hours.
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