Airtac MFJ Adjustable Mini Cylinder MFJ40X100-75S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X100-75S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 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 MFJ40X100-75S
Trimming the extend end by up to 75 mm on-site, the AirTAC MFJ40X100-75S lets you dial in the final position without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, giving you a shorter mounting envelope than an ISO 6432 unit for the same 40 mm bore and 100 mm stroke.
Driven by a 16 mm rod and a 1/4" port, the double-acting design delivers 628.3 N of push force at 0.5 MPa. The built-in magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing, while fixed TPU bumper pads absorb end-of-stroke impacts across the 30-800 mm/s speed range.
Airtac MFJ Adjustable Mini Cylinder MFJ40X100-75S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X100-75S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 MFJ40X100-75S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 MFJ40X100-75S Is Used
Changeover Stations
Fine-tune the extend position up to 75 mm during format changeovers, accommodating different product sizes without swapping out the entire actuator.
Prototype Fit-Ups
Dial in the exact end-of-stroke stop during R&D trial fits, using the 628.3 N push force to press or locate components precisely.
Variable Position Stops
Adjust the extend endpoint on the fly for flexible machining or clamping routines, relying on the M14x1.5 male thread for secure tool mounting.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X100-75S the Right Cylinder?
When sizing this series, compare the two available bores: the 40 mm option here yields 628.3 N push at 0.5 MPa, whereas the smaller MFJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures, keeping in mind the computed safe working load is roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
The 75 mm adjustment window is ideal for trial fits and line changeovers where the exact extend position is unknown. Mount via LB foot, FA flange, or TC trunnion (no SDB). Remember that the bumper only decelerates the stroke end; for fail-safe load holding on air loss, install an external rod lock or pilot check valve.
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 MFJ40X100-75S FAQ
This 40 mm bore cylinder uses a 1/4" port and generates 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external adjuster shortens the extend stroke by up to 75 mm on-site, giving a usable extend range of 25-100 mm. Fixed TPU bumpers decelerate the end of stroke but do not lock the piston; the cylinder drifts on air loss, so use an external rod lock for holding.
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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