Airtac MFJ Adjustable Mini Cylinder MFJ40X15-10
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X15-10 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 15mm 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
- Stroke15 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 MFJ40X15-10
Tune your extend end-position on site with the AirTAC MFJ40X15-10, 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 10 mm, giving a usable 5 to 15 mm extend window for trial fits without buying a new unit. This double-acting actuator delivers 628.3 N of push force at 0.5 MPa, supported by fixed TPU bumper pads that decelerate the stroke end.
For the same 40 mm bore and 15 mm stroke, this riveted construction is physically shorter than an ISO 6432 cylinder, saving valuable mounting length while resisting mild washdown. The 1/4" port and M14x1.5 male rod thread handle the 128.1 kgf theoretical maximum force at 1.0 MPa. Based on the 0.5 MPa push rating, a safe working load is roughly 377 N, meaning it lifts about 32 kg vertically with a 2:1 margin. Note that this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X15-10 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X15-10 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MFJ40X15-10
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MFJ40X15-10 Is Used
Changeover Dial-In
Fine-tune the 5 to 15 mm extend position on packaging changeover lines, using the 628.3 N push force to seat components without external stops.
Trial Fit Rigs
Dial in the exact end-point during prototype assembly, leveraging the 377 N safe working load to press parts gently before finalising the stroke.
Variable Position Stops
Act as an adjustable hard stop for light machining tasks, where the fixed TPU bumpers absorb the impact of the 32 kg vertical lift capacity.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X15-10 the Right Cylinder?
Choose between the two available bores by matching your force requirements: the MFJ32 yields 402.2 N of push force at 0.5 MPa, while this MFJ40 provides a stronger 628.3 N at the same pressure. The adjustable stroke feature is ideal for changeover stations or set-up rigs where the exact end position is not final, letting you dial in the 10 mm window on the fly. Mounting options include LB foot, FA flange, and TC trunnion (with no SDB or back-cover available).
Keep in mind that the external adjuster only sets the extend end position; it is not a mid-stroke lock. The cylinder will drift and cannot hold a load on air loss, so add an external rod lock or pilot-operated check valve if you need fail-safe holding. Because this model has no -S magnet, position sensing is unavailable unless you upgrade to the -S variant for switch readiness.
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 MFJ40X15-10 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 10 mm on-site, yielding a 5 to 15 mm usable window, while the retract remains full. The fixed TPU bumpers only decelerate the stroke end; the cylinder drifts on air loss, so you need an external rod lock or pilot check valve to hold a load.
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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