Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30 is a genuine double acting, adjustable stroke 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
- 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 MFJ40X100-30
Trim the extend stroke by up to 30 mm right at the fixture with the AirTAC MFJ40X100-30, a double-acting JIS-standard round-body mini cylinder. The external adjuster lets you set the usable extend between 70 and 100 mm without buying a new unit or adding external stops. A SUS304 stainless barrel and riveted aluminium covers keep the body shorter than an ISO 6432 cylinder of the same bore, while resisting mild washdown.
In the 40 mm bore class, this unit delivers 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. That translates to a safe working load of about 377 N, or lifting roughly 32 kg vertically with a 2:1 margin. The 1/4" port and M14x1.5 male rod thread handle the airflow for speeds of 30-800 mm/s. Fixed TPU bumpers decelerate the stroke ends, and because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 MFJ40X100-30
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 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 MFJ Adjustable Mini Cylinder MFJ40X100-30 Is Used
Changeover Stations
Dial in the 70 to 100 mm extend position on the fly during format changes, using the 628.3 N push force to seat varying part sizes without swapping hardware.
Trial Fit Rigs
Perfect for prototype benches where the exact stroke is unknown, letting technicians shorten the extend by up to 30 mm to prevent over-travel during testing.
Variable Position Stops
Acts as a pneumatic hard stop that can be fine-tuned on-site, handling the 377 N safe working load to halt moving sub-assemblies gently at the correct point.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30 the Right Cylinder?
Choose between the two available bores based on your force needs: the MFJ32 yields 402.2 N of push force at 0.5 MPa, whereas this MFJ40 provides a sturdier 628.3 N. The 30 mm adjustable window is ideal for trial fits and line changeovers where the exact end position is not yet final. For mounting, select from LB foot, FA flange, or TC trunnion brackets, as there is no SDB or back-cover option. Remember that the adjuster only shortens the extend stroke and the bumpers only decelerate; the piston will drift on air loss, so fit an external rod lock or pilot check valve if you need to hold a load.
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 MFJ40X100-30 FAQ
This 40 mm bore cylinder has a 1/4" port and an M14x1.5 male rod thread. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external adjuster shortens the extend stroke by up to 30 mm on-site, giving a usable extend range of 70 to 100 mm, while the retract remains full. The cylinder uses fixed TPU bumper pads to decelerate at the stroke ends, not an adjustable air cushion. Also, this SKU lacks a magnet, so it cannot take position 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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