Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40 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 MFJ25X175-40
Trim the extend stroke by up to 40 mm on site with the external adjuster on this MFJ25X175-40 pneumatic cylinder, giving a usable extend range of 135-175 mm without buying a new unit. As a JIS-standard round-body mini cylinder, its riveted aluminium covers and SUS304 stainless steel barrel form a body that is notably shorter than an ISO 6432 cylinder for the same 25 mm bore and 175 mm stroke.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa (343.4 N / 288.5 N at 0.7 MPa), it suits moderate load positioning. The 1/8" port and M10x1.25 male rod thread simplify integration. This non-magnet SKU cannot host a sensor; adding the -S option enables CMSG/DMSG/EMSG switches. Fixed TPU bumper pads absorb end impacts, and the SUS304 barrel resists mild washdown.
Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40 |
|---|---|
| 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 MFJ25X175-40
| 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 MFJ25X175-40 Is Used
Changeover Stops
Dial in the 135-175 mm extend position during product line changeovers, using the 40 mm window to set new stops without machining new hard stops.
Trial Fit Rigs
Perfect for prototype assembly rigs where the exact 12.5 kg vertical lift endpoint is unknown, letting operators fine-tune the stroke on the fly.
Variable Positioning
Handle moderate 245.3 N push loads in packaging machines, adjusting the extend end by up to 40 mm to accommodate different carton sizes quickly.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X175-40 the Right Cylinder?
Choosing between bores means matching the force to the mass. The MFJ20 provides 157 N @0.5 MPa for lighter duties, while the MFJ32 jumps to 402.2 N for heavier stops. This MFJ25 sits in the middle at 245.3 N push, translating to a safe working load of roughly 147 N or lifting about 12.5 kg vertically with a 2:1 margin. The 40 mm adjustable window is perfect for changeovers where the exact end position is not final.
Mount using LB foot, FA flange, or TC trunnion (no SDB or back-cover here). Remember that the bumper only decelerates the stroke end; it is not a lock. If you need to hold a load against air loss, add an external rod lock or pilot check valve, as the piston 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 MFJ25X175-40 FAQ
This 25 mm bore cylinder has a 1/8" port and an M10x1.25 male rod thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, rising to 343.4 N push and 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa, with an operating speed of 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 40 mm on site (usable range 135-175 mm); retract remains full. The fixed TPU bumper pads only decelerate the end of travel and do not act as a lock. Also, this non-S SKU lacks a magnet and cannot take CMSG/DMSG/EMSG sensors.
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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