Airtac MFJ Adjustable Mini Cylinder MFJ40X150-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-20 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 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 MFJ40X150-20
Trimming the extend end by up to 20 mm on site, this double-acting AirTAC mini cylinder lets you dial in the 130 to 150 mm forward position without swapping hardware. The riveted aluminium covers and SUS304 stainless round body form a JIS-standard unit that is physically shorter than a comparable ISO 6432 cylinder, saving valuable machine length while resisting mild washdown corrosion.
Driven by a 16 mm rod through a 1/4" port, the 40 mm bore delivers 628.3 N of push force at 0.5 MPa. That translates to a safe working load around 377 N, or roughly 32 kg of vertical lift with a 2:1 margin. Fixed TPU bumpers absorb end impacts across the 30 to 800 mm/s speed range, and because this specific SKU lacks the -S magnet, it cannot host CMSG, DMSG or EMSG switches.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-20 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MFJ40X150-20
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MFJ40X150-20 Is Used
Changeover Dial-In
Perfect for packaging line changeovers where the exact 130 to 150 mm extend position varies by product, letting operators fine-tune the stop without changing the cylinder.
Prototype Stroke Setup
Ideal for R&D test rigs that need to find the optimal forward endpoint by hand, safely shifting up to 377 N of test payload.
Variable Position Stops
Handles secondary machining operations on 40 mm bore tooling where a fixed external stop is impractical, providing 628.3 N of push at 0.5 MPa.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-20 the Right Cylinder?
When sizing these adjustable units, compare the thrust directly: this 40 mm bore pushes 628.3 N at 0.5 MPa, whereas the smaller MFJ32 delivers 402.2 N. Choose the 40 mm when moving heavier jigs, and use the external adjuster to perfect the extend endpoint during trial fits or frequent line changeovers. Retract remains a fixed 150 mm.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover variant exists). Remember that the bumper only decelerates the stroke end; the cylinder will drift and drop the load on air loss, so fit an external rod lock or pilot check valve if you need vertical holding. For position feedback, you must select the -S magnet version to use sensors.
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 MFJ40X150-20 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, 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.
An external adjuster shortens the extend stroke by up to 20 mm, giving a usable forward range of 130 to 150 mm; retract stays fixed. Fixed TPU bumper pads decelerate the piston at the ends, but they do not lock the load. Note this SKU has no magnet, so CMSG/DMSG/EMSG sensors cannot be fitted.
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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