Airtac MFCJ Adjustable Mini Cylinder MFCJ40X100-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X100-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
- 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 MFCJ Adjustable Mini Cylinder MFCJ40X100-30S
Tune both the extend reach and end-of-stroke shock on site with this double-acting AirTAC mini cylinder. The MFCJ40X100-30S uses an external adjuster to shorten the extend stroke by up to 30 mm (yielding a 70-100 mm usable window), while a needle variable air cushion at both ends soaks up high-speed impact. It features a SUS304 stainless steel barrel with riveted aluminium covers, giving a shorter JIS-standard round body than an ISO 6432 cylinder for the same 100 mm stroke.
In the 40 mm bore class, this unit delivers 628.3 N of push force at 0.5 MPa (879.6 N at 0.7 MPa) via a 1/4" port and a 16 mm rod with an M14x1.5 male thread. For sizing, this translates to a safe working load of roughly 377 N, or lifting about 32 kg vertically with a 2:1 safety margin. The -S suffix denotes a built-in piston magnet, enabling CMSG, DMSG or EMSG position switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X100-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X100-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 MFCJ40X100-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 MFCJ40X100-30S Is Used
High-Speed Component Pressing
Dial in the exact 70-100 mm extend reach for pressing bearings, relying on the 628.3 N push force and needle air cushion to absorb end-of-stroke shock without slamming.
Variable-Length Diverter Arms
Adjust the extend stroke on the fly to route different carton sizes on a conveyor, using the variable air cushion to quietly halt the 40 mm bore at high speed.
Vertical Lift Stops
Lift loads up to 32 kg in a 2:1 margin setup, tweaking the 30 mm adjuster window to hit the precise discharge height while the cushion softens the stop.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X100-30S the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when you need the higher 628.3 N push force at 0.5 MPa, compared to the 402.2 N available on the 32 mm bore. This 40 mm bore is ideal for high-speed changeovers where both the exact extend end-position and the deceleration ramp need field tuning to prevent shock damage during trial fits. Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option on this adjustable build).
Note that the air cushion only decelerates the piston near the stroke end; it does not function as a lock or brake. If air pressure drops, the cylinder will drift and cannot hold a load. For suspended or vertical loads that must remain fixed during air loss, install an external rod lock or a pilot-operated check valve.
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 MFCJ40X100-30S FAQ
This 40 mm bore double-acting cylinder has 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 max force of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm, and the needle variable air cushion at both ends decelerates the piston near the ends for smooth high-speed motion. The cushion is not a brake; the cylinder will drift on air loss. The -S magnet allows CMSG, DMSG, or EMSG sensors for position detection.
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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