Airtac MFJ Adjustable Mini Cylinder MFJ40X40-10
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X40-10 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MFJ40X40-10
Trimming the extend stroke by up to 10 mm on site, the AirTAC MFJ40X40-10 lets you fine-tune the end position without buying a new cylinder or adding external stops. This double-acting, JIS-standard round-body mini cylinder features a SUS304 stainless steel barrel and riveted aluminium covers, yielding a shorter overall length than an ISO 6432 unit for the same 40 mm stroke.
In the 40 mm bore class, it generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa, peaking at a theoretical 128.1 kgf at 1.0 MPa. The 1/4" port and M14x1.5 male rod thread handle robust airflow, while fixed TPU bumper pads absorb end-of-stroke impacts. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X40-10 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X40-10 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MFJ40X40-10
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MFJ40X40-10 Is Used
Changeover Stations
Dial in the 30-40 mm extend position during product line changeovers using the 10 mm adjuster, avoiding the need to swap out physical hard stops for each new fixture.
Trial Fit Rigs
Leverage the 628.3 N push force to press components while fine-tuning the exact insertion depth on site, ensuring perfect alignment before finalizing the machine design.
Variable Position Stops
Use the compact JIS-standard body where space is tight, relying on the 527.8 N pull force to retract the tooling while the external adjuster sets the precise forward limit.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X40-10 the Right Cylinder?
Choose between the two available bores based on your force requirements: the MFJ32 delivers 402.2 N of push force at 0.5 MPa, whereas this MFJ40 provides 628.3 N. The 10 mm adjustable window is ideal for trial fits and line changeovers where the exact extend position is not yet final. For vertical lifting, expect a safe working load of about 377 N (roughly 60% of the 0.5 MPa push figure), which lifts approximately 32 kg with a 2:1 safety margin.
Mounting options include LB foot, FA flange, and TC trunnion brackets (no SDB or back-cover mount). Note that the external adjuster sets the end position but does not function as a mid-stroke lock; the piston will drift if air pressure is lost, so install an external rod lock or pilot check valve for holding 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 MFJ40X40-10 FAQ
This 40 mm bore cylinder uses 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, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa, and the operating speed ranges from 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 10 mm on site, giving a usable extend range of 30-40 mm; the retract stroke remains full. Fixed TPU bumper pads decelerate the piston near the end of travel, but this is not a lock. The cylinder cannot hold a load on air loss, and because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG 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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