Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 175mm stroke, G1/2 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.
- BoreØ125 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 33 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 JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty power into a compact hard-anodized aluminium profile barrel that is noticeably shorter than a same-bore ISO 15552 unit. The G1/2 port feeds a 32 mm rod, and the built-in magnet (-S) accepts CMSE/DMSE switches in the side grooves for precise position detection.
A 40 mm external stop window lets you trim the extend stroke anywhere from the 175 mm maximum down to 135 mm right on the floor, perfect for dialing in end positions without swapping hardware. It handles a safe working load of about 3682 N, which means you can vertically lift roughly 313 kg with a 2:1 safety margin. Remember the retract end is fixed, and the 33 mm adjustable air cushions only decelerate the load—they will not hold it if air pressure drops.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max standard stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×175 | 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 JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S Is Used
Press Fit Tuning
Dial in the exact 135-175 mm extend reach on-site to seat bearings without bottoming out the tooling.
Heavy Pallet Stop
Use the 6136 N push force to halt large loaded pallets, adjusting the stop position in 1 mm increments.
Vertical Load Lowering
Safely lower 313 kg loads using the 2:1 margin, relying on the 33 mm cushions for smooth end-of-stroke deceleration.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S the Right Cylinder?
This 125 mm bore sits at the top of the range, pushing 6136 N at 0.5 MPa; if your application only needs 3927 N, step down to the 100 mm bore to save space and air. The adjustable stroke is ideal for sharing one spare across multiple stroke variants or fine-tuning a pressing end position. Mounting options include FA, LB, TC, TCM1, and TCM2. The -S magnet supports CMSE/DMSE sensors. For any stroke over 300 mm, always use a guide rail to prevent side-load damage to the rod seals.
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 JSIJ100~125 Adjustable Cylinder JSIJ125X175-40S FAQ
At 0.5 MPa it pushes 6136 N and pulls 5734 N. At 0.7 MPa it pushes 8590 N and pulls 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 air port and a 32 mm piston rod with an M27x2.0 thread.
The nominal 175 mm stroke is the maximum extend length. An external stop screw lets you shorten the extend stroke by up to 40 mm on-site, giving a usable range of 135-175 mm. The retract end is fixed. This stop sets the end position and is not a load lock.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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