Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100 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 MFJ40X225-100
Dial in your extend end position on the fly with the AirTAC MFJ40X225-100, 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 100 mm on site, yielding a usable extend range of 125-225 mm without buying a new unit. The retract stroke remains full length, and fixed TPU bumper pads absorb impact at the ends.
This 40 mm bore double-acting actuator delivers 628.3 N of push force at 0.5 MPa and pulls with 527.8 N, operating at 30-800 mm/s through its 1/4" port. For a comparable bore and stroke, this riveted body is shorter than an ISO 6432 cylinder, saving valuable mounting length while resisting mild washdown corrosion. Based on the 0.5 MPa push rating, it handles a safe working load of roughly 377 N and lifts about 32 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100 |
|---|---|
| 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 MFJ40X225-100
| 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 MFJ40X225-100 Is Used
Adjustable Stop Stations
Fine-tune the 125-225 mm extend position during line changeovers to set precise pushing distances without machining new hard stops.
Prototyping Rigs
Test different extend lengths on the fly for 40 mm bore actuation tasks, leveraging the 628.3 N push force to trial various end positions.
Variable Push Assembly
Handle multiple part sizes on one station by dialing the extend stroke back up to 100 mm, safely moving loads under 377 N.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X225-100 the Right Cylinder?
When sizing between the two available bores, the MFJ40 provides 628.3 N push at 0.5 MPa compared to the MFJ32 at 402.2 N, making this 40 mm bore the right pick for heavier positioning. The 100 mm adjustable window is ideal for trial fits and line changeovers where the exact end position is not finalised. Mount using LB foot, FA flange, or TC trunnion brackets (no SDB or back-cover option exists). Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors. Note that the adjuster sets the end position but does not act as a mid-stroke lock; the piston will drift on air loss, so add an external rod lock or pilot check valve to hold a 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 MFJ40X225-100 FAQ
This 40 mm bore double-acting cylinder uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It pushes with 628.3 N and pulls with 527.8 N at 0.5 MPa. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm on site, giving a 125-225 mm usable range, while fixed TPU bumpers decelerate the stroke ends. The adjuster is not a lock; the piston drifts on air loss. This SKU has no magnet (-S) and cannot take sensors.
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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