Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40 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 MFJ40X150-40
Trimming the extend end by up to 40 mm on site, this AirTAC MFJ40X150-40 adjustable-stroke cylinder lets you dial in the exact 110 to 150 mm working length during line changeovers without swapping hardware. As a JIS-standard round-body mini, its riveted aluminium covers and SUS304 stainless steel barrel form a package that is physically shorter than an ISO 6432 cylinder of the same bore and stroke, resisting mild washdown corrosion while saving mounting length.
Built for double-acting operation on a 1/4" port with a 16 mm rod and M14x1.5 male thread, the 40 mm bore pushes 628.3 N and pulls 527.8 N at 0.5 MPa. That translates to a safe working load around 377 N, or roughly 32 kg of vertical lift with a 2:1 margin. Fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range, and because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG or EMSG reed switches.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40 |
|---|---|
| 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 MFJ40X150-40
| 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 MFJ40X150-40 Is Used
Changeover Dial-In
Fine-tune the 110 to 150 mm extend position during product family changeovers, using the 40 mm adjuster window to set new end stops without machining new hard stops.
Trial Fit Assembly
Leverage the 628.3 N push force to seat components on a test rig, dialing the stroke back incrementally to find the exact 40 mm bore contact depth before finalizing the line.
Variable Position Stops
Act as an adjustable physical stop for pallets or lifts, safely handling the 32 kg vertical working load while operators tweak the extend end to accommodate different package sizes.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-40 the Right Cylinder?
When sizing between the two available bores, the 40 mm bore here delivers 628.3 N of push force at 0.5 MPa compared to 402.2 N on the MFJ32, making it the right pick if you need to move heavier jigs. The external adjuster is ideal for trial fits and variable-position stops where the final extend dimension is not yet finalised. Just remember the adjuster only shortens the extend stroke; retract remains full.
For mounting you can use LB foot, FA flange or TC trunnion brackets (there is no SDB or back-cover option on this build). Note that a plain cylinder drifts on air loss—the TPU bumper decelerates the stroke but does not lock the load, so fit an external rod lock or pilot check valve if you need to hold a vertical load safely in place.
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 MFJ40X150-40 FAQ
This 40 mm bore double-acting cylinder uses a 1/4" port and a 16 mm rod. It pushes 628.3 N and pulls 527.8 N at 0.5 MPa, pushes 879.6 N and pulls 738.9 N at 0.7 MPa, with a theoretical maximum force of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm on site, giving a usable 110 to 150 mm extend window while retract stays full. Fixed TPU bumper pads decelerate the stroke end, but they do not lock the piston; the cylinder will drift on air loss, so use an external rod lock for holding.
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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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