Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 175mm stroke, 1/8" 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.
- BoreØ25 mm
- Stroke175 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM10×1.25
- 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 MFJ25X175-40S
Trimming the extend stroke by up to 40 mm on site, the AirTAC MFJ25X175-40S lets you dial in the exact end position between 135 and 175 mm without buying a new unit. 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 a comparable ISO 6432 build while resisting mild washdown. A built-in magnet (-S) enables position sensing.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, the Ø10 mm piston rod delivers 245.3 N of push force at 0.5 MPa. That translates to a safe working load of roughly 147 N, or about 12.5 kg of vertical lift 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 MFJ25X175-40S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MFJ25X175-40S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×175 | 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 MFJ25X175-40S Is Used
Changeover Stations
Dial in the 135-175 mm extend position on the fly for product changeovers, using the 245.3 N push force to push varying fixtures into place without external stops.
Trial Fit Rigs
Use the 40 mm adjustment window to test multiple extend endpoints during prototyping, safely lifting up to 12.5 kg vertically while finding the optimal reach.
Variable-Position Stops
Replace hard mechanical stops with the external adjuster to fine-tune the extend end, relying on fixed TPU bumpers to decelerate the 30-800 mm/s motion.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40S the Right Cylinder?
When sizing this adjustable-stroke family, compare the real thrust: the MFJ20 yields 157 N of push force at 0.5 MPa, while the MFJ32 jumps to 402.2 N. This MFJ25 sits in the middle at 245.3 N, making it ideal when you need moderate force plus the flexibility to shorten the extend stroke during line changeovers or trial fits. If your final position is not yet locked, the 40 mm adjustment window saves you from swapping cylinders.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover here). The -S magnet allows CMSG, DMSG, or EMSG switches for end-of-stroke confirmation. Remember that the external adjuster only sets the extend endpoint—it is not a mid-stroke lock. The piston will drift on air loss, so fit an external rod lock or pilot check valve if you need to hold a suspended load.
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 MFJ25X175-40S FAQ
This double-acting cylinder uses a 1/8" port and a Ø10 mm rod. At 0.5 MPa it pushes 245.3 N and pulls 206.1 N. At 0.7 MPa it pushes 343.4 N and pulls 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm, giving a usable range of 135-175 mm; retract remains full. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors. Fixed TPU bumpers decelerate the stroke ends.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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