Airtac JSI Series Standard Cylinder JSI40X50SFB
The AirTAC Airtac JSI Series Standard Cylinder JSI40X50SFB is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 50mm stroke, G1/4 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ40 mm
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable, 20.5 mm
- 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 JSI Series Standard Cylinder JSI40X50SFB
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than a same-bore ISO 15552 unit. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life. Because the piston carries a magnet, CMSE or DMSE reed and electronic switches drop directly into the side grooves for position sensing.
At 0.5 MPa you should plan for a safe working load of about 377 N of real work, rather than the full theoretical rating. This translates to lifting roughly 32 kg vertically with a 2:1 safety margin, helping you match the actuator to actual part weights. The unit connects via a G1/4 port and uses an M14x1.5 rod thread.
Airtac JSI Series Standard Cylinder JSI40X50SFB Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X50SFB |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 | Adjustable, 20.5 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 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 JSI Series Standard Cylinder JSI40X50SFB
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSI Series Standard Cylinder JSI40X50SFB Is Used
Package Diverting
Pushes small cartons off a packaging conveyor with 628 N of force at 0.5 MPa, fitting easily into tight transfer gaps.
Small Part Clamping
Secures plastic housings during machining using the FB flange mount, with the magnet triggering a DMSE sensor to confirm grip.
Light Assembly Press
Drives a 50 mm stroke to seat bearings or pins, safely lifting about 32 kg vertically with a 2:1 margin.
Is the Airtac JSI Series Standard Cylinder JSI40X50SFB the Right Cylinder?
If 628 N of push at 0.5 MPa is excessive for your cycle, dropping down to the 32 mm bore yields 402 N; conversely, stepping up to the 50 mm bore provides 982 N for heavier indexing. This specific SKU includes an FB flange mounting interface and an integrated magnet for position sensing. Note that a standard cylinder drifts when air is lost or the valve is centered, as the adjustable air cushion only decelerates the piston near stroke end rather than locking it; add an external rod lock or pilot-operated check valve if the load must be held.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
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 Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSI Series Standard Cylinder JSI40X50SFB FAQ
The 40 mm bore has a G1/4 port and delivers 628 N push / 528 N pull at 0.5 MPa, 879 N push / 739 N pull at 0.7 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore, saving space without losing functionality. The integrated magnet allows CMSE/DMSE switches to be fitted in the side grooves.
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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