Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75S 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
- 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 MFJ40X75-75S
Trimming the extend end by up to 75 mm on-site, this double-acting AirTAC MFJ40X75-75S mini cylinder removes the guesswork from trial fits and line changeovers. The built-in -S magnet enables position sensing with CMSG, DMSG, or EMSG switches. A 1/4" port and M14x1.5 male rod thread handle the 40 mm bore's air and mounting needs.
The riveted SUS304 stainless barrel and aluminium covers form a JIS-standard round body that is physically shorter than a comparable ISO 6432 unit, saving valuable machine space while resisting mild washdown corrosion. Delivering 628.3 N of push force at 0.5 MPa, it provides a safe working load of roughly 377 N or lifts about 32 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75S |
|---|---|
| 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 MFJ40X75-75S
| 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 MFJ40X75-75S Is Used
Changeover Positioning Stops
Dial in the extend endpoint within the 75 mm window during product format changes, using the 628.3 N thrust to push new stops into the exact trial position.
Prototype Fit-Up Rigs
Safely test multiple extend lengths on a 40 mm bore actuator without machining new spacers, leveraging the 32 kg vertical lift capacity for heavy component trials.
Variable Stroke Clamping
Adjust the clamping reach on the fly for different part heights, letting the fixed TPU bumper absorb the 879.6 N peak force at 0.7 MPa without complex reprogramming.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X75-75S the Right Cylinder?
Choosing between the two available bores comes down to force: this 40 mm bore generates 628.3 N push at 0.5 MPa, while the smaller MFJ32 provides 402.2 N. If your changeover rig needs to lift around 32 kg vertically with a 2:1 safety margin, the 40 mm is the correct choice; lighter positioning tasks can rely on the 32 mm. Both share the 1/4" porting and 30-800 mm/s speed range.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover here). The external adjuster fine-tunes the extend position but does not function as a mid-stroke lock; if air pressure drops, the piston will drift. For dead-load holding, install an external rod lock or pilot check valve rather than relying on the fixed TPU bumper pads.
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 MFJ40X75-75S FAQ
This 40 mm bore cylinder uses a 1/4" port and features a 16 mm rod with an M14x1.5 male thread. At 0.5 MPa it delivers 628.3 N push and 527.8 N pull; at 0.7 MPa it outputs 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster mechanically shortens the extend stroke by up to 75 mm, letting you set the exact end position on-site. The -S suffix means a piston magnet is included for use with CMSG, DMSG, or EMSG sensors. End-of-stroke deceleration is handled by fixed TPU bumper pads, not an adjustable air cushion.
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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.
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Most inquiries answered within 7-8 hours.
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