Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 60mm 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
- Stroke60 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 MFJ40X60-20
Trim the extend stroke by up to 20 mm directly on the machine with the AirTAC MFJ40X60-20, a double-acting JIS-standard round-body mini cylinder. It delivers 628.3 N of push force at 0.5 MPa, making it a solid choice for moderate-duty positioning tasks.
The riveted rolling-packed construction features a SUS304 stainless steel barrel and aluminium covers, yielding a body that is shorter than an ISO 6432 cylinder for the same 40 mm bore and 60 mm stroke. Air connects via a 1/4" port, and fixed TPU bumper pads absorb end-of-travel impacts. Because this specific SKU lacks the -S magnet option, it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 60 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 MFJ40X60-20
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×60 | 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 MFJ40X60-20 Is Used
Changeover Stations
Dial in the extend position within the 20 mm window during product changeovers, using the 628.3 N push force to shift medium-weight tooling heads without swapping cylinders.
Trial Fit Rigs
Perfect for prototype assembly rigs where the exact reach is unknown, allowing on-site shortening of the 60 mm stroke until the optimal end point is found.
Variable Position Stops
Act as an adjustable stop for incoming parts on a conveyor, fine-tuning the 40 mm bore extend distance on the fly to accommodate different product widths.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20 the Right Cylinder?
When sizing these adjustable-stroke units, compare the two available bores directly: the 40 mm bore here yields 628.3 N push at 0.5 MPa, whereas the smaller MFJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures, keeping in mind the computed safe working load is roughly 377 N, or about 32 kg of vertical lift with a 2:1 margin.
The external adjuster is ideal for trial fits and line changeovers where the exact end position is not yet final, letting you set the extend stroke anywhere from 40 to 60 mm without buying a new cylinder. Note that the bumper only decelerates the stroke end; it does not lock the rod. For holding a load on air loss, install an external rod lock or pilot check valve. Mounting options include LB foot, FA flange, and TC trunnion.
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 MFJ40X60-20 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, and the operating speed ranges from 30 to 800 mm/s.
An external adjuster lets you shorten the extend stroke by up to 20 mm on-site, giving a usable extend range of 40 to 60 mm without changing the cylinder body. Fixed TPU bumper pads decelerate the piston at the stroke ends. This SKU does not include a magnet, so CMSG, DMSG, or 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.
Request a Quote for Airtac MFJ Adjustable Mini Cylinder MFJ40X60-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.