Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- 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 MFJ40X225-100S
Trimming the extend end by up to 100 mm on-site, the AirTAC MFJ40X225-100S lets you set a precise 125 to 225 mm forward travel without buying a new unit. This JIS-standard round-body mini cylinder uses a SUS304 stainless barrel and riveted aluminium covers to resist mild washdown while saving mounting length compared to an ISO 6432 build. A 1/4" port and M14x1.5 male rod thread feed the 40 mm bore, generating 628.3 N of push force at 0.5 MPa.
Because the -S suffix equips the piston with a magnet, you can track position with CMSG, DMSG or EMSG switches. Fixed TPU bumper pads decelerate the stroke ends across the 30-800 mm/s speed range. For vertical lifts, the 0.5 MPa push force handles roughly 32 kg with a 2:1 safety margin, giving a safe working load near 377 N.
Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MFJ40X225-100S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MFJ40X225-100S Is Used
Changeover Stations
Dial in the exact 125-225 mm extend position during product format changes without swapping out the entire actuator.
Prototype Rigs
Leverage the 628.3 N push force to test new end-of-arm tooling reach, tweaking the stroke length safely as the design evolves.
Variable Position Stops
Use the 100 mm adjuster window to fine-tune part ejection depth on the fly while the fixed TPU bumpers absorb end impacts.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100S the Right Cylinder?
When sizing this adjustable family, compare both bores directly: the MFJ40 delivers 628.3 N push at 0.5 MPa, whereas the MFJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier jigs or overcoming significant friction. The 100 mm adjustment window is invaluable for trial fits and line changeovers where the exact end position is not finalised.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover code applies here). Remember that the external adjuster only shortens the extend stroke; it does not lock the load. If air pressure drops, the piston will drift, so fit an external rod lock or pilot check valve for suspended loads.
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 MFJ40X225-100S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm on-site, giving a usable forward travel of 125-225 mm; retract remains full. The -S suffix means a piston magnet is built-in for CMSG, DMSG or EMSG sensors, and fixed TPU bumpers decelerate the 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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