Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 65mm 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
- Stroke65 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 MFJ25X65-20S
Trimming the extend stroke by up to 20 mm on-site, the AirTAC MFJ25X65-20S 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 barrel and riveted aluminium covers, giving you a mounting envelope that is noticeably shorter than an equivalent ISO 6432 unit while resisting mild washdown.
The 25 mm bore delivers 245.3 N of push force at 0.5 MPa, yielding a safe working load of roughly 147 N or about 12.5 kg of vertical lift with a 2:1 margin. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG switches, and the 1/8" port keeps air flow compact for this force class.
Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 65 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 MFJ25X65-20S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×65 | 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 MFJ25X65-20S Is Used
Changeover Dial-In
Perfect for packaging lines where the exact extend position shifts between product sizes; turn the external adjuster to trim up to 20 mm without swapping hardware.
Prototype Fit-Up
Ideal for R&D rigs using the 12 mm male rod thread, letting engineers fine-tune the 245 N push stroke to find the optimal engagement point before finalizing the design.
Variable Position Stops
Use the built-in magnet with DMSG sensors to confirm the adjusted end position in automated assembly stations handling light 12 kg vertical lifts.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S the Right Cylinder?
When sizing this adjustable family, compare the real 0.5 MPa push figures: the MFJ20 provides 157 N, this MFJ25 hits 245.3 N, and the larger MFJ32 jumps to 402.2 N. Choose the 25 mm bore when your mechanism needs roughly 147 N of safe working force and you want the flexibility to shorten the extend end from 65 mm down to 45 mm during trial fits or line changeovers.
Mounting options include LB foot, FA flange and TC trunnion (there is no SDB or back-cover option on this build). Remember that the fixed TPU bumper pads only decelerate the stroke end—they do not lock the piston. If gravity or air loss could cause drift, fit an external rod lock or pilot check valve to hold the 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 MFJ25X65-20S FAQ
This 25 mm bore double-acting cylinder uses a 1/8" port and a 10 mm rod with an M10x1.25 male thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on-site, giving a usable extend range of 45-65 mm; retract remains full. The -S suffix denotes a built-in piston magnet for CMSG, DMSG or EMSG sensors. Fixed TPU bumpers decelerate the stroke ends but do not act as a lock.
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.
Request a Quote for Airtac MFJ Adjustable Mini Cylinder MFJ25X65-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.