Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75S 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 MFJ40X150-75S
Trimming the extend stroke by up to 75 mm on site, this double-acting JIS-standard round-body mini cylinder removes the need to buy a new unit when the exact end position is not final. The SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than an ISO 6432 cylinder for the same 40 mm bore and 150 mm stroke, saving valuable mounting length. A built-in magnet (-S) supports CMSG, DMSG, and EMSG switches.
In the 40 mm bore class, the 1/4" port and 16 mm rod deliver a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. This translates to a safe working load of roughly 377 N, or lifting about 32 kg vertically with a 2:1 margin. Fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75S |
|---|---|
| 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 MFJ40X150-75S
| 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 MFJ40X150-75S Is Used
Changeover Stations
Dial in the extend position within the 75 mm window during product format changes, using the 628.3 N push force to seat varying tooling without swapping cylinders.
Trial Fit Rigs
Perfect for prototyping where the final extend length is unknown; shorten the 150 mm stroke on site until the kinematics are verified.
Variable Position Stops
Replace hard mechanical stops with the integrated adjuster to fine-tune the end of travel for parts presenting different heights or profiles.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-75S the Right Cylinder?
Choose the MFJ40 over the MFJ32 when you need more push: the 40 mm bore yields 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm version. The external adjuster here is ideal for trial fits and line changeovers, letting you dial in the extend end anywhere within a 75 mm window without external stops. Mounting options include LB foot, FA flange, and TC trunnion (no SDB).
Remember that the adjuster sets the end position but does not lock the rod mid-stroke. If air pressure drops, the piston will drift; for a held load, install an external rod lock or pilot check valve. The -S magnet enables position sensing with CMSG, DMSG, or EMSG switches.
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 MFJ40X150-75S FAQ
This 40 mm bore cylinder has a 1/4" port and a 16 mm rod. At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 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 75 mm from the 150 mm base, but it cannot extend beyond 150 mm and does not lock the rod mid-stroke. The -S suffix means a magnet is built in for CMSG, DMSG, or EMSG sensors; fixed TPU bumpers decelerate the stroke ends.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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