Airtac MFJ Adjustable Mini Cylinder MFJ40X25-10S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X25-10S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 MFJ40X25-10S
Trimming the extend stroke by up to 10 mm on site, the AirTAC MFJ40X25-10S lets you dial in the exact end position without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless steel barrel and riveted aluminium covers, giving you a shorter overall mounting length than an equivalent ISO 6432 unit while resisting mild washdown corrosion.
As a double-acting 40 mm bore unit, it delivers 628.3 N of push force at 0.5 MPa. The built-in piston magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing. For sizing, this bore yields a safe working load around 377 N, meaning it can lift about 32 kg vertically with a 2:1 safety margin. The 1/4" port and fixed TPU bumper pads handle speeds of 30-800 mm/s.
Airtac MFJ Adjustable Mini Cylinder MFJ40X25-10S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X25-10S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MFJ40X25-10S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MFJ40X25-10S Is Used
Changeover Dial-In
Fine-tune the extend endpoint during product changeovers by adjusting the stroke up to 10 mm, ensuring precise positioning without swapping hardware.
Trial Fit Rigs
Perfect for prototype test fixtures where the exact extend position is unknown, letting you safely dial in the stop while moving 32 kg loads.
Variable Position Stops
Acts as an adjustable hard stop for light pressing tasks, leveraging the 628.3 N push force to seat components before final calibration.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X25-10S the Right Cylinder?
When deciding between the two available bores, the MFJ40 provides 628.3 N of push force at 0.5 MPa, whereas the smaller MFJ32 offers 402.2 N. Choose this 40 mm bore when your trial fit or changeover rig demands higher thrust within a compact footprint. The external adjuster is invaluable for variable-position stops where the exact extend endpoint is not final, letting you shorten the nominal 25 mm stroke down to 15 mm.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Keep in mind that the fixed TPU bumpers only decelerate the stroke end; they do not lock the piston. If your application must hold a load vertically on air loss, add an external rod lock or pilot check valve, as the cylinder will drift.
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 MFJ40X25-10S FAQ
This 40 mm bore double-acting cylinder has a 1/4" port and a male M14x1.5 rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical max of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on site, giving a usable 15-25 mm range, but it is not a mid-stroke lock. The -S suffix means it has a built-in magnet for CMSG, DMSG, and EMSG switches. 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.
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Most inquiries answered within 7-8 hours.
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