Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75
Dial in your extend end-point on the fly with the AirTAC MFJ40X75-75, 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 75 mm directly on the machine, which is ideal for trial fits and line changeovers where the exact travel is not yet final. This double-acting 40 mm bore delivers 628.3 N of push force at 0.5 MPa, yielding a safe working load of about 377 N or a 32 kg vertical lift with a 2:1 margin.
The riveted construction keeps the overall body shorter than a comparable ISO 6432 unit, saving valuable mounting space, while the stainless barrel resists mild corrosion and washdown. This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors. It uses fixed TPU bumper pads to decelerate the stroke end and features a 1/4" port with an M14x1.5 male rod thread.
Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MFJ40X75-75
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MFJ40X75-75 Is Used
Changeover Stations
Fine-tune the extend position by up to 75 mm during product format changes, using the 628.3 N push force to shift medium-weight guides without adding external stops.
Trial Fit Rigs
Dial in the exact end-of-stroke point on prototype assembly tooling where the final travel distance is unknown, leveraging the 32 kg vertical lift capacity.
Variable-Position Stops
Adjust the extend stroke on the fly for flexible manufacturing lines, relying on the SUS304 stainless barrel to withstand mild washdown environments.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75 the Right Cylinder?
When sizing this series, compare the two available bores directly: this MFJ40 pushes with 628.3 N at 0.5 MPa, whereas the smaller MFJ32 provides 402.2 N. Choose the 40 mm bore if your application requires lifting roughly 32 kg vertically with a 2:1 safety margin, and drop down to the 32 mm if your load is lighter. The 75 mm adjustable window is highly useful for variable-position stops or set-up rigs where you need to tune the extend distance without swapping cylinders.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option). Keep in mind that the fixed TPU bumpers only decelerate the stroke end; they do not lock the rod. If you need to hold a load vertically during air loss, add an external rod lock or pilot check valve. For position feedback, you must select the -S magnet variant to use 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 MFJ40X75-75 FAQ
This 40 mm bore cylinder features a 1/4" port and an M14x1.5 male rod thread. At 0.5 MPa it generates 628.3 N of push force and 527.8 N of pull force. At 0.7 MPa the push increases to 879.6 N and the pull to 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 on-site, but it cannot extend the stroke beyond the base 75 mm. The cylinder uses fixed TPU bumper pads to decelerate at the end of travel, not an adjustable air cushion. Because this SKU lacks the -S magnet, it cannot take sensors, and the bumpers do not function as a lock; use an external rod lock for load holding.
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