Airtac MFJ Adjustable Mini Cylinder MFJ40X200-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X200-40 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 MFJ40X200-40
Dial in your extend end-point on the fly with the AirTAC MFJ40X200-40, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 40 mm on-site, giving a usable 160-200 mm window without buying a new unit or adding external stops. The riveted construction is shorter than an ISO 6432 cylinder for the same 40 mm bore and 200 mm stroke, saving valuable mounting length while the stainless body resists mild washdown.
This double-acting 40 mm bore delivers 628.3 N of push force at 0.5 MPa, making it a robust choice for moderate loads. Based on that 0.5 MPa figure, it handles a safe working load of about 377 N, lifting roughly 32 kg vertically with a 2:1 margin. It uses a 1/4" port, a 16 mm rod, and fixed TPU bumper pads to decelerate the stroke end. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X200-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X200-40 |
|---|---|
| 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 MFJ40X200-40
| 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 MFJ40X200-40 Is Used
Changeover Stations
Fine-tune the 160-200 mm extend position during product changeovers without swapping cylinders, leveraging the 628.3 N push force to move heavier jigs.
Trial Fit Rigs
Dial in the exact 40 mm stroke window on prototype assembly rigs where the final stop position is unknown until parts are physically tested.
Variable Position Stops
Adjust the end-of-stroke bumping point on the fly for delicate pressing tasks, using the fixed TPU pads to cushion the 879.6 N peak force at 0.7 MPa.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X200-40 the Right Cylinder?
When sizing these adjustable cylinders, compare both bores directly: this MFJ40 pushes 628.3 N at 0.5 MPa, while the smaller MFJ32 delivers 402.2 N at the same pressure. Choose the 40 mm bore if your trial fits and changeover stations need that extra thrust margin. The 40 mm adjustment window is ideal for line changeovers where the exact end position is unknown during commissioning.
For mounting, select LB foot, FA flange, or TC trunnion brackets (there is no SDB or back-cover option here). Remember that the 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 check valve to hold position. Because this specific SKU has no -S magnet, you cannot mount magnetic switches to it.
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 MFJ40X200-40 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, and 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 40 mm on-site, giving a 160-200 mm usable window, while the retract remains full length. It uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion. Also, this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
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.
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Most inquiries answered within 7-8 hours.
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