Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S 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
About the Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S
Fine-tune your extend end-position on-site with the AirTAC MFJ40X80-10S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. The external adjuster shortens the 80 mm extend stroke by up to 10 mm (usable extend 70-80 mm) without buying a new unit or adding external stops, making it ideal for trial fits and line changeovers.
Delivering 628.3 N push force at 0.5 MPa via a 1/4" port and Ø16 rod, this double-acting actuator yields a safe working load of about 377 N and lifts roughly 32 kg vertically with a 2:1 margin. The -S suffix equips the piston with a magnet for CMSG/DMSG/EMSG switches, while the compact riveted body is shorter than an ISO 6432 cylinder of the same bore and stroke.
Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S |
|---|---|
| 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 MFJ40X80-10S
| 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 MFJ40X80-10S Is Used
Changeover Dial-In
Twist the external adjuster to trim the extend stroke by up to 10 mm during product changeovers, saving the cost of swapping out the whole 628.3 N actuator.
Trial Fit Rig
Perfect for prototype assembly rigs where the final 70-80 mm extend position is unknown, letting you test clamping forces without machining new stops.
Variable Position Stop
Use the 10 mm window to set precise end-of-stroke damping for medium payloads, relying on the fixed TPU bumpers to absorb the impact at the adjusted point.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S the Right Cylinder?
When sizing this adjustable-stroke family, compare both bores: the MFJ40 pushes 628.3 N at 0.5 MPa, whereas the smaller MFJ32 delivers 402.2 N. Choose the 40 mm bore if your payload approaches the 377 N safe working load, and rely on the 10 mm extend adjuster to dial in the exact 70-80 mm end point during commissioning.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Remember that fixed TPU bumper pads only decelerate the stroke end; because a plain cylinder drifts on air loss, install an external rod lock or pilot check valve if you need 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 MFJ40X80-10S FAQ
This 40 mm bore cylinder has a 1/4" port, a Ø16 mm rod with an M14x1.5 male thread, and delivers 628.3 N push / 527.8 N pull at 0.5 MPa, 879.6 N push / 738.9 N pull at 0.7 MPa, and a theoretical max of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on-site (usable extend 70-80 mm); it only sets the end position and is not a mid-stroke lock. The -S suffix means a piston magnet is installed for CMSG/DMSG/EMSG switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MFJ Adjustable Mini Cylinder MFJ40X80-10S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.