Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 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 MFJ40X80-10
Trimming the extend end by up to 10 mm on site, the AirTAC MFJ40X80-10 lets you dial in the final 70 to 80 mm of travel without swapping hardware. This JIS-standard round-body mini cylinder pairs a SUS304 stainless barrel with riveted aluminium covers, yielding a shorter mounting envelope than an ISO 6432 unit of the same bore and stroke.
In the 40 mm bore class, it delivers 628.3 N of push force and 527.8 N of pull at 0.5 MPa, peaking at a 128.1 kgf theoretical maximum. The 1/4" port and M14x1.5 male rod thread handle robust airflow, while fixed TPU bumper pads absorb end-of-stroke impacts. Note this SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MFJ40X80-10
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MFJ40X80-10 Is Used
Changeover Dial-In
Perfect for packaging lines where the 10 mm adjuster nudge aligns pusher blocks during rapid format changes, utilizing the 628.3 N thrust.
Prototype Trial Fits
Ideal for R&D rigs where the exact 70 to 80 mm extend endpoint is unknown, letting technicians shorten the stroke without machining new stops.
Variable Position Stops
Handles intermediate clamping on machining fixtures, offering a safe 377 N working load while resisting mild coolant splash via the SUS304 barrel.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10 the Right Cylinder?
When sizing these adjustable units, compare the real outputs: this MFJ40X80-10 pushes 628.3 N at 0.5 MPa, whereas the smaller MFJ32 manages 402.2 N. Choose the 40 mm bore when moving heavier jigs, and use the 10 mm external adjuster to fine-tune the extend position during line changeovers or trial fits.
Keep in mind the adjuster only sets the end position; it is not a mid-stroke lock, and the cylinder will drift if air pressure drops. For vertical loads, add an external rod lock or pilot check valve. Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover option here), and select the -S magnet version if you need position sensing.
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 MFJ40X80-10 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 generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 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.
The external adjuster shortens the extend stroke by up to 10 mm on site, giving a usable 70 to 80 mm travel. Fixed TPU bumpers decelerate the piston at the ends, but they do not lock or hold the load—if air is lost, the cylinder drifts. Also, this non-S SKU has no magnet for 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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