Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20 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 MFJ25X100-20
Trim the extend stroke by up to 20 mm directly at the fixture with the AirTAC MFJ25X100-20, a JIS-standard round-body mini cylinder built for double-acting air operation. The external adjuster lets you set the extend end anywhere in an 80 to 100 mm usable window without swapping hardware, while the retract stroke remains full length. A 1/8" port feeds the 25 mm bore to generate 245.3 N of push force at 0.5 MPa.
The riveted SUS304 stainless barrel and aluminium covers yield a body shorter than an ISO 6432 unit for the same stroke, saving valuable mounting space while resisting mild washdown corrosion. Fixed TPU bumper pads absorb end-of-travel impacts across the 30 to 800 mm/s speed range. This non-magnet SKU cannot host a position sensor; order the -S variant to enable CMSG, DMSG or EMSG switches.
Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20 |
|---|---|
| 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 MFJ25X100-20
| 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 MFJ25X100-20 Is Used
Changeover Stations
Dial in the 80 to 100 mm extend position during product format changes using the 20 mm adjuster, avoiding the need to machine new hard stops for each run.
Prototype Fit-Ups
Safely test end-of-stroke contact points on new assemblies with 245.3 N of push force, backing off the adjuster slightly if the part binds.
Variable Position Stops
Provide adjustable physical endpoints for lightweight 12.5 kg vertical lifts where the exact bottom position varies between workpieces.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20 the Right Cylinder?
Pick the right bore by comparing the 0.5 MPa push figures: the MFJ20 yields 157 N, this MFJ25 hits 245.3 N, and the MFJ32 jumps to 402.2 N. The on-site adjuster is ideal for trial fits and line changeovers where the exact extend position is not final, letting you fine-tune the end point within the 20 mm window. For vertical loads, expect safe lifting of about 12.5 kg with a 2:1 margin, or roughly 147 N working load.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover option exists). Remember that the bumper only decelerates the stroke end; it does not lock the rod. If air pressure drops, the piston will drift, so fit an external rod lock or pilot check valve to hold a suspended 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 MFJ25X100-20 FAQ
This 25 mm bore cylinder uses a 1/8" port and a 10 mm rod with M10x1.25 male thread. 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 maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on-site, giving a usable extend window of 80 to 100 mm. Fixed TPU bumper pads decelerate the piston at the end of travel but do not function as a lock. The piston will drift on air loss, so use an external rod lock for suspended loads.
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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