Airtac MFJ Adjustable Mini Cylinder MFJ40X160-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X160-20 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 160mm 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
- Stroke160 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 MFJ40X160-20
Trim the extend end by up to 20 mm directly on the machine with the AirTAC MFJ40X160-20, giving a usable forward travel of 140 to 160 mm while keeping full retract. This JIS-standard round-body mini cylinder uses a SUS304 stainless barrel and riveted aluminium covers to resist mild washdown, fitting a 40 mm bore into a shorter envelope than an ISO 6432 unit. A 1/4" port and M14x1.5 male rod thread feed the 16 mm piston rod.
The 40 mm bore delivers 628.3 N of push force at 0.5 MPa, placing this unit in a heavy-duty mini class. For motion tasks, the safe working load sits around 377 N, and it lifts about 32 kg vertically with a 2:1 safety margin. Fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range.
Airtac MFJ Adjustable Mini Cylinder MFJ40X160-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X160-20 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 160 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 MFJ40X160-20
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 MFJ40X160-20 Is Used
Changeover Stations
Dial in the 140-160 mm extend position during format changes, using the adjuster to set new end stops for varying part lengths without swapping hardware.
Trial Fit Rigs
Leverage the 628.3 N push force to seat components, relying on the 20 mm window to find the exact seating depth before finalizing the machine layout.
Variable Position Stops
Act as a heavy-duty 40 mm bore stopper for incoming workpieces, shortening the extend stroke on the fly to accommodate different product widths on the line.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X160-20 the Right Cylinder?
When sizing this series, compare the two bores directly: the MFJ40 hits 628.3 N push at 0.5 MPa, whereas the MFJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier jigs or defeating substantial return friction. The 20 mm adjustment window is ideal for trial fits and line changeovers where the exact end position is not yet final, letting you fine-tune the extend stop without buying a new cylinder.
This non-magnet SKU cannot host CMSG, DMSG, or EMSG sensors; add the -S variant if you require position detection. Mount via LB foot, FA flange, or TC trunnion. Because fixed bumpers only decelerate the stroke end, fit an external rod lock or pilot check valve if the load must resist drift on air loss.
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 MFJ40X160-20 FAQ
This 40 mm bore cylinder uses a 1/4" port and a 16 mm rod. 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.
An external adjuster shortens the extend stroke by up to 20 mm on site; it does not add stroke and is not a mid-stroke lock. Fixed TPU bumpers decelerate the stroke end, but the piston drifts on air loss, so use an external rod lock for holding. This SKU lacks a magnet, so it cannot take 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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