Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30S 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 MFJ40X100-30S
Fine-tune your extend end-position on-site with the AirTAC MFJ40X100-30S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the 100 mm extend stroke by up to 30 mm, giving a usable 70-100 mm window without buying a new unit or adding external stops. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG switches.
This double-acting 40 mm bore unit delivers 628.3 N push force at 0.5 MPa, peaking at a theoretical 128.1 kgf at 1.0 MPa. It features fixed TPU bumper pads for end-deceleration and a 1/4" port. For the same bore and stroke, the MF body is shorter than an ISO 6432 cylinder, saving mounting length while the stainless barrel resists mild washdown.
Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30S |
|---|---|
| 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 MFJ40X100-30S
| 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 MFJ40X100-30S Is Used
Changeover Dial-In
Perfect for packaging lines needing variable extend stops; tweak the 30 mm window to shift the push endpoint during product format changes.
Prototype Fit-Up
Ideal for test rigs where the 628.3 N push force must probe a 70-100 mm range before finalizing the exact end position.
Variable Positioning Stops
Use the 40 mm bore power to push parts, adjusting the contact point on-site without machining new hard stops.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X100-30S the Right Cylinder?
Choose the MFJ40 over the MFJ32 when you need heavy push force: the 40 mm bore yields 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm version. This 40 mm model is ideal for trial fits and line changeovers where the exact extend position is not final, letting you dial in the 70-100 mm stroke on the fly. A practical safe working load is about 377 N, lifting roughly 32 kg vertically with a 2:1 margin.
Mounting options include LB foot, FA flange and TC trunnion (no SDB). Note that the bumper only decelerates the stroke end; the cylinder does not hold position on air loss, so add an external rod lock or pilot check valve for suspended loads.
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 MFJ40X100-30S FAQ
This 40 mm bore cylinder has a 1/4" port and an M14x1.5 male rod thread. It delivers 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 of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm (usable 70-100 mm); it only sets the end position and is not a mid-stroke lock. The -S suffix means a magnet is built in for CMSG/DMSG/EMSG sensors, and fixed TPU bumpers decelerate the stroke ends.
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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