Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 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 MFJ40X150-40S
Trimming the extend end by up to 40 mm on site, the MFJ40X150-40S lets you dial in the exact 110 to 150 mm forward position without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder uses a SUS304 stainless barrel and riveted aluminium covers, delivering a body that is shorter than an ISO 6432 unit for the same 40 mm bore and 150 mm stroke.
The 1/4 inch port and Ø16 mm rod with an M14x1.5 male thread drive a robust 628.3 N push force at 0.5 MPa. Because the -S suffix includes a piston magnet, you can mount CMSG, DMSG or EMSG switches for position sensing. Fixed TPU bumper pads absorb end impacts, and the SUS304 construction resists mild washdown corrosion.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MFJ40X150-40S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MFJ40X150-40S Is Used
Changeover Stations
Fine-tune the 110 to 150 mm extend position during product format changes, using the 40 mm adjuster to set new end stops without swapping hardware.
Trial Fit Rigs
Leverage the 628.3 N push force to press components while dialing in the exact forward position during prototype assembly testing.
Variable Position Stops
Adjust the extend endpoint on the fly for operations requiring slight positional shifts, relying on the SUS304 body for mild washdown resistance.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40S the Right Cylinder?
Choosing between the two MFJ bores comes down to force: this 40 mm bore pushes 628.3 N and pulls 527.8 N at 0.5 MPa, whereas the 32 mm bore manages 402.2 N of push. For a safe working load of roughly 377 N or a vertical lift of about 32 kg with a 2:1 margin, the 40 mm bore is the correct choice. The 40 mm adjuster window is ideal for trial fits and line changeovers where the exact extend position is not yet final.
Mounting options include LB foot, FA flange and TC trunnion, with no SDB or back-cover variant available. Remember that the external adjuster only sets the extend end point; it does not lock the piston mid-stroke. If you need to hold a load on air loss, add an external rod lock or pilot check valve, as the bumper pads only decelerate the stroke end.
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 MFJ40X150-40S FAQ
This 40 mm bore cylinder features a 1/4 inch port and delivers a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. 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 usable extend range of 110 to 150 mm, while retract remains full. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG sensors. Fixed TPU bumper pads decelerate the stroke end, but the adjuster is not a mid-stroke lock.
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