Airtac MFJ Adjustable Mini Cylinder MFJ25X80-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X80-30S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 80mm 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
- Stroke80 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 MFJ25X80-30S
Tune your extend end position on the fly with the AirTAC MFJ25X80-30S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 30 mm directly on site, giving a usable extend range of 50 to 80 mm without buying a new unit or adding external stops. The retract stroke remains full length.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa, this double-acting actuator provides a safe working load of roughly 147 N, lifting about 12.5 kg vertically with a 2:1 margin. It features a 1/8" port, a Ø10 mm piston rod with an M10x1.25 male thread, and fixed TPU bumper pads for end-deceleration. The -S suffix means it has a built-in piston magnet for CMSG, DMSG, or EMSG switches. Furthermore, its riveted body is shorter than an equivalent ISO 6432 cylinder, saving valuable mounting length.
Airtac MFJ Adjustable Mini Cylinder MFJ25X80-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X80-30S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 80 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 MFJ25X80-30S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | 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 MFJ25X80-30S Is Used
Changeover Stations
Dial in the extend stroke by up to 30 mm during product format changes, using the 245.3 N push force to position light tooling precisely without swapping cylinders.
Trial-Fit Rigs
Perfect for prototype assemblies where the exact extend endpoint is unknown, letting engineers adjust the 80 mm stroke on the fly until the optimal travel is found.
Variable-Position Stops
Act as a compact, adjustable mechanical stop for light pressing or locating tasks, safely handling around 147 N of working load while saving machine length.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X80-30S the Right Cylinder?
When sizing these adjustable actuators, compare the real thrust figures: the MFJ20 provides 157 N of push force at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 delivers 402.2 N. Choose the MFJ25 when your trial-fit rigs or changeover stations need moderate force with on-site stroke tuning. The 30 mm adjuster window is perfect for dialing in variable-position stops when the exact end position is not yet final.
Remember that the fixed TPU bumpers only decelerate the stroke end; they do not function as a lock. If air pressure drops, the piston will drift, so you must add an external rod lock or pilot-operated check valve to hold a suspended load. For mounting, you can use LB foot, FA flange, or TC trunnion brackets (no SDB or back-cover option exists on this build).
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 MFJ25X80-30S FAQ
This double-acting cylinder has a 1/8" port and a Ø10 mm rod. 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 force of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm (usable extend 50-80 mm); it only sets the end position and does not act as a mid-stroke lock. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG sensors, and 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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Most inquiries answered within 7-8 hours.
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