Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 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 JSIJ125X275-75S
Generating 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty motion into a compact envelope that is noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminum extruded barrel contains no external tie rods, and the G1/2 port handles the high air volume this large piston requires. A built-in magnet (-S) allows CMSE or DMSE sensors to drop directly into the side grooves for precise position detection.
The -75 code defines an external adjuster window that lets you shorten the extend stroke on-site from the 275 mm maximum down to 200 mm without swapping the cylinder. This on-site end-position tuning is ideal for dialing in a shared spare across stroke variants. Based on the 0.5 MPa push rating, it handles about 3682 N of safe working load, which translates to roughly 313 kg lifted vertically with a 2:1 margin. The retract end remains fixed, and the 33 mm adjustable air cushions only decelerate the load near the ends.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 JSIJ125X275-75S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | 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 JSIJ125X275-75S Is Used
Heavy Pallet Lift
Raises loaded pallets in packaging lines, using the 75 mm adjuster to dial in the exact lift height for different box sizes without changing hardware.
Press Stroke Tuning
Drives a light stamping or forming press where the extend end position must be micro-adjusted on the floor to accommodate varying material thicknesses.
Heavy Divert Gate
Actuates a high-mass sorting diverter on a conveyor, relying on the 6136 N push force and 33 mm cushions to absorb the kinetic energy smoothly.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-75S the Right Cylinder?
When sizing this unit, the 63 mm bore offers 1559 N push at 0.5 MPa for lighter loads, while the 125 mm sits at the top of the range with a 1251 kgf maximum at 1.0 MPa. The adjustable stroke mechanism shines when you need to fine-tune the extend endpoint on-site or keep one spare for multiple stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. The -S magnet supports reed and electronic CMSE/DMSE switches. Because the 275 mm stroke exceeds 300 mm, ensure you use a guide rail to prevent excessive side loading on the rod.
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 JSIJ125X275-75S FAQ
At 0.5 MPa it delivers 6136 N push and 5734 N pull. At 0.7 MPa it outputs 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. This 125 mm bore unit uses a G1/2 air port.
The 275 mm nominal stroke is the maximum extend length. The external adjuster screw lets you shorten the extend stroke on-site by up to 75 mm, giving a usable range of 200 to 275 mm. The retract end is fixed. This mechanism sets the end position and does not lock the load.
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1-Year Warranty
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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