Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75 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 MFJ40X150-75
Trimming the extend stroke by up to 75 mm on site, the AirTAC MFJ40X150-75 brings 628.3 N of push force at 0.5 MPa to your fixturing without forcing you to buy a new cylinder or add external stops. This JIS-standard round-body mini cylinder uses a SUS304 stainless barrel with riveted aluminium covers, measuring shorter than an ISO 6432 unit for the same 40 mm bore and 150 mm stroke to save valuable mounting length. It operates on a 1/4" port with a 16 mm rod, and the fixed TPU bumper pads absorb end-of-travel impacts across the 30-800 mm/s speed range.
Because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG sensors for position feedback. In terms of practical payload capacity, the 628.3 N @0.5 MPa push force translates to a safe working load of roughly 377 N, or lifting about 32 kg vertically with a 2:1 safety margin. The external adjuster lets you dial in the exact 75 to 150 mm extend position during trial fits and line changeovers, while the retract stroke remains full length.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75 |
|---|---|
| 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 MFJ40X150-75
| 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 MFJ40X150-75 Is Used
Changeover Stations
Dial in the 75 mm extend adjustment window during product changeovers to set new end positions on the fly, utilising the 628.3 N push force for firm clamping.
Prototype Fit-Up Rigs
Test multiple extend lengths between 75 and 150 mm on trial assemblies without machining new stops, leveraging the 377 N safe working load for component pressing.
Variable Position Stops
Serve as an adjustable mechanical end-stop in light machining fixtures where the exact cut depth or contact point needs frequent on-site tuning.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75 the Right Cylinder?
When sizing this JIS round-body series, you choose between the MFJ32 and the MFJ40 based on your force requirements: the 32 mm bore delivers 402.2 N of push force at 0.5 MPa, whereas this MFJ40 provides a robust 628.3 N. The 75 mm adjustable window is ideal for commissioning rigs where the exact extend position is not finalised, letting you fine-tune the end point without swapping hardware. Mounting options include LB foot, FA flange, and TC trunnion (with no SDB or back-cover available on this adjustable build).
Keep in mind that this non-magnetised SKU cannot support position sensing, so you must rely on external timing or mechanical stops for feedback. Furthermore, the fixed TPU bumpers only decelerate the piston near the stroke ends; they do not function as a lock. If your application must hold a load vertically during air loss, you must add an external rod lock or a pilot-operated check valve, as the piston will drift otherwise.
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 MFJ40X150-75 FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm piston rod. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 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 75 mm on site (usable extend 75-150 mm), while retract remains full. The fixed TPU bumpers only decelerate the stroke end and do not lock the load; use an external rod lock for holding. This SKU lacks a magnet, so it cannot take CMSG/DMSG/EMSG switches.
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.
Fast Reply
Most inquiries answered within 7-8 hours.
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