Airtac JSI Series Standard Cylinder JSI40X170S
The AirTAC Airtac JSI Series Standard Cylinder JSI40X170S is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 170mm 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
- Stroke170 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 JSI40X170S
Delivering 628 N of push force at 0.5 MPa, the AirTAC JSI40X170S is a double-acting JIS-standard profile cylinder built for tight machinery layouts. Its extruded hard-anodized aluminum barrel omits external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. The internal two-way piston seal retains grease for long, low-friction life, while the integrated magnet (-S) allows CMSE or DMSE switches to drop directly into the side grooves for position sensing.
For practical sizing, plan for about 377 N of real work at 0.5 MPa, which safely lifts roughly 32 kg vertically with a 2:1 margin. The unit features a 16 mm carbon steel rod with an M14x1.5 thread, adjustable air cushions at both ends, and a G1/4 port. Operating speeds range from 30-800 mm/s across a 0.15-1.0 MPa pressure range.
Airtac JSI Series Standard Cylinder JSI40X170S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X170S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 170 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 JSI40X170S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×170 | 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 JSI40X170S Is Used
Package Diverting
Actuates routing gates on 30-800 mm/s packaging lines to deflect parcels up to 32 kg onto secondary chutes.
Clamp Actuation
Provides 628 N of push at 0.5 MPa to secure aluminum extrusions in a machining fixture before drilling.
Component Ejection
Pushes molded plastic parts out of a press mold using the 170 mm stroke, relying on the cushion to prevent end-impact.
Is the Airtac JSI Series Standard Cylinder JSI40X170S the Right Cylinder?
When sizing this 40 mm bore, the smaller JSI32 offers 402 N push at 0.5 MPa, while the larger JSI50 provides 982 N if your payload exceeds the 628 N rating. Because this SKU includes the -S magnet, it is fully ready for CMSE or DMSE electronic or reed sensors. Keep in mind the standard JSI does not hold its load if air pressure drops or the valve is centered; the piston will drift, as the end cushions only decelerate motion near stroke end and do not act as a brake. For suspended loads, specify 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?
- ✓ 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 JSI40X170S FAQ
The 40 mm bore generates 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 and an M14x1.5 rod thread.
The JSI is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. It uses an extruded hard-anodized aluminum barrel with no external rods, saving space on tight machines.
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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.
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Most inquiries answered within 7-8 hours.
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