Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20
Tune both travel and end-of-stroke shock precisely with this 40 mm bore adjustable-stroke mini cylinder. A built-in needle valve provides a variable air cushion at both ends to absorb kinetic energy, while the external adjuster allows you to shorten the extend stroke on-site by up to 20 mm (usable extend 55-75 mm). It delivers 628.3 N push force at 0.5 MPa through a 1/4" port.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, it is shorter than an ISO 6432 cylinder for the same footprint, resisting mild washdown corrosion. Based on the 0.5 MPa push rating, expect a safe working load around 377 N, lifting roughly 32 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MFCJ Adjustable Mini Cylinder MFCJ40X75-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MFCJ Adjustable Mini Cylinder MFCJ40X75-20 Is Used
High-Speed Forming Press
Dial in the 55-75 mm extend position and use the needle cushion to absorb the 628.3 N push force impact during rapid metal stamping changeovers.
Package Divert Arm
Fine-tune the divert stroke length on-site by 20 mm while the variable air cushion ensures quiet, shock-free stops for heavy 32 kg goods routing.
Pallet Stopper Gate
Adjust the extend endpoint to match varying pallet widths and rely on the dual cushions to decelerate the 377 N safe working load smoothly at high cycle rates.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20 the Right Cylinder?
When choosing between the two available bores, the MFCJ40 provides 628.3 N push at 0.5 MPa compared to the MFCJ32 at 402.2 N. Select this 40 mm bore if your changeover or trial fit involves heavier payloads needing robust shock absorption at high speeds. The adjustable stroke and cushion combination is ideal for dialling in the exact end position and deceleration without swapping hardware.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Remember the air cushion only decelerates the piston near stroke end; it is not a brake. If your application must hold a load vertically during air loss, add an external rod lock or pilot check valve to prevent drift.
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 MFCJ Adjustable Mini Cylinder MFCJ40X75-20 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, 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.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for sensing. The external adjuster shortens the extend stroke by up to 20 mm, and the variable air cushion decelerates the piston but does not lock the load.
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.
Related AirTAC MFCJ Cylinders
Request a Quote for Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.