Airtac MFJ Adjustable Mini Cylinder MFJ25X175-20S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X175-20S 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 MFJ25X175-20S
Dial in your extend position on-site with the AirTAC MFJ25X175-20S, a JIS-standard round-body mini cylinder. An external adjuster shortens the extend stroke by up to 20 mm, giving you a usable 155-175 mm window without buying a new unit or adding external stops. The SUS304 stainless barrel and riveted aluminium covers resist mild washdown while keeping the total length shorter than a comparable ISO 6432 cylinder.
This double-acting 25 mm bore delivers 245.3 N push and 206.1 N pull at 0.5 MPa, making it a solid fit for moderate-force positioning. With a safe working load around 147 N, it lifts about 12.5 kg vertically with a 2:1 margin. The -S suffix means a piston magnet is built in for CMSG, DMSG, or EMSG sensors. It uses a 1/8" port, a 10 mm rod, fixed TPU bumpers, and operates at 30-800 mm/s.
Airtac MFJ Adjustable Mini Cylinder MFJ25X175-20S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X175-20S |
|---|---|
| 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 MFJ25X175-20S
| 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 MFJ25X175-20S Is Used
Changeover Stations
Fine-tune the 155-175 mm extend position during product line changeovers to accommodate different part sizes without swapping hardware.
Trial Fit Rigs
Use the 20 mm adjuster to find the optimal push distance for prototype assemblies, locking in the exact 245.3 N force position.
Variable Position Stops
Act as an adjustable end-stop for light pressing tasks, safely handling the 12.5 kg vertical lift capacity with a 2:1 margin.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X175-20S the Right Cylinder?
When sizing this series, compare the real thrust: the MFJ20 provides 157 N, this MFJ25 hits 245.3 N, and the MFJ32 jumps to 402.2 N at 0.5 MPa. Choose the 25 mm bore when your load falls in that middle band. The 20 mm adjustable window is ideal for trial fits and line changeovers where the exact end position is not final.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Note that the bumper only decelerates the stroke end; it does not hold the load on air loss. For vertical loads, add 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 MFJ25X175-20S FAQ
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 max is 50 kgf at 1.0 MPa. It has a 10 mm rod, 1/8" port, and operates at 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 20 mm on-site, but it does not add stroke beyond the 175 mm base. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG sensors. Fixed TPU bumpers decelerate the stroke end.
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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