Airtac MFJ Adjustable Mini Cylinder MFJ25X100-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X100-30S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 100mm 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
- Stroke100 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 MFJ25X100-30S
Dial in your extend end-position on the fly with the AirTAC MFJ25X100-30S, a JIS-standard round-body mini cylinder built from a SUS304 stainless steel barrel and riveted aluminium covers. An external adjuster lets you shorten the forward stroke by up to 30 mm on site, giving a usable extend range of 70 to 100 mm without buying a new unit. The riveted construction is shorter overall than a comparable ISO 6432 cylinder, saving valuable mounting length while resisting mild corrosion and washdown.
Fitted with a 10 mm piston rod, an M10×1.25 male thread, and a 1/8" air port, this double-acting actuator delivers 245.3 N of push force at 0.5 MPa. That translates to a safe working load of roughly 147 N, or enough to lift about 12.5 kg vertically with a 2:1 safety margin. The -S suffix means a piston magnet is installed, ready for CMSG, DMSG, or EMSG reed or electronic switches. Fixed TPU bumper pads decelerate the stroke ends across the 30 to 800 mm/s speed range.
Airtac MFJ Adjustable Mini Cylinder MFJ25X100-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X100-30S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 100 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 MFJ25X100-30S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×100 | 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 MFJ25X100-30S Is Used
Trial-Fit Assembly Rigs
Use the 30 mm extend adjuster to dial in the exact push position during prototype builds, accommodating part variations without swapping cylinders.
Changeover Stations
Rapidly reconfigure a 245.3 N push point for different product runs by turning the external adjuster instead of re-machining hard stops.
Variable-Position Stops
Set a precise 70 to 100 mm extend endpoint for light press-fit operations where a 12.5 kg vertical load capability is required.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X100-30S the Right Cylinder?
When sizing these adjustable actuators, compare the real thrust: the MFJ20 provides 157 N of push at 0.5 MPa, this MFJ25 hits 245.3 N, and the MFJ32 jumps to 402.2 N. Choose the 25 mm bore when your fixture falls in that middle weight class. The 30 mm adjuster window is perfect for trial-fit rigs or line changeovers where the exact end position is not final, letting you fine-tune the extend stop without machining external blocks.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option on this build). Remember that the bumper pads only decelerate the stroke end; they do not lock the rod. If your application must hold a load on air loss, add an external rod lock or pilot-operated 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 MFJ25X100-30S FAQ
This double-acting cylinder has a 1/8" air port and delivers 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical max force is 50 kgf at 1.0 MPa, and the operating speed ranges from 30 to 800 mm/s.
The external adjuster shortens the extend stroke by up to 30 mm on site, giving a usable forward range of 70 to 100 mm; retract remains full. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG switches. Fixed TPU bumpers decelerate the stroke ends but do not lock the rod.
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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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