Airtac JSI Series Standard Cylinder JSI40X15
The AirTAC Airtac JSI Series Standard Cylinder JSI40X15 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 15mm 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
- Stroke15 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 JSI40X15
Delivering 628 N of push force at 0.5 MPa, the AirTAC JSI40X15 is a double-acting JIS-standard profile cylinder built for exceptionally tight spaces. Its 15 mm stroke is a non-standard, made-to-order dimension below the usual 25 mm minimum, making it perfect for very short clamping or ejecting motions. Because it uses an extruded hard-anodized aluminum barrel instead of external rods, the overall envelope is noticeably shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore.
The internal two-way piston seal retains grease for a long, low-friction service life, while the adjustable air cushions at both ends decelerate the piston near stroke end. Plan for about 377 N of real work at 0.5 MPa, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin. This specific SKU lacks the -S magnet, so it cannot accept CMSE or DMSE position sensors; add the -S variant if you need drop-in side-groove sensing. Air connects via a G1/4 port.
Airtac JSI Series Standard Cylinder JSI40X15 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X15 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 JSI40X15
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×15 | 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 JSI40X15 Is Used
Short-Stroke Clamping
Provides 628 N of push at 0.5 MPa to hold thin sheet metal or plastic parts securely in place during light CNC machining operations.
Compact Package Ejector
Uses its 15 mm travel to kick small cartons off a packaging line quickly, fitting into machinery gaps where a standard 25 mm stroke would collide.
Small Part Positioning
Indexes lightweight electronic components into a testing fixture, taking advantage of the 32 kg vertical lift capacity to raise delicate assemblies.
Is the Airtac JSI Series Standard Cylinder JSI40X15 the Right Cylinder?
When sizing this 40 mm bore, stepping down to a 32 mm bore drops the 0.5 MPa push force to 402 N, while stepping up to a 50 mm bore increases it to 982 N. Since this is a non-standard 15 mm stroke, expect a made-to-order lead time. Remember that a plain cylinder drifts if air is lost or the valve is centered; the cushions only decelerate the piston and do not act as a lock. For a held load, install an external rod lock or a pilot-operated check valve. Standard mounting options include LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, or an I/Y/F/U rod knuckle.
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 JSI40X15 FAQ
The 40 mm bore produces 628 N push and 528 N pull at 0.5 MPa, or 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa. It uses a G1/4 air port, a 16 mm rod, and an M14x1.5 rod-end thread.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSE or DMSE switches. You must select the -S variant to utilize the side sensor grooves for position detection.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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