Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-75
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-75 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 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 JSIJ125X300-75
Delivering 6136 N of push force at 0.5 MPa, this large-bore JIS actuator brings serious power to your fixture while remaining more compact than a same-bore ISO 15552 cylinder. The hard-anodized aluminium profile barrel keeps weight down without external support rods. With a 125 mm bore, it uses a G1/2 port and a 32 mm rod with an M27x2.0 thread.
The external stop screw lets you trim the extend stroke by up to 75 mm on-site, giving a usable forward range of 225-300 mm without swapping the cylinder. This on-site tuning handles about 3682 N of real work safely, roughly 313 kg lifted vertically with a 2:1 margin. Note that this SKU lacks a magnet, so it cannot take a CMSE or DMSE sensor.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-75 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-75 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 JSIJ125X300-75
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×300 | 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 JSIJ125X300-75 Is Used
Heavy Pallet Lift
Raises loaded pallets in a packaging line, using the 75 mm adjuster to fine-tune the exact raise height for different box sizes without changing the actuator.
Press Tonnage Stop
Provides 8590 N of push at 0.7 MPa for light pressing tasks, allowing operators to dial in the exact 225 mm end position on-site for precise assembly depth.
Divertor Gate Control
Actuates a heavy sorting diverter on a conveyor, using the adjustable forward stroke to alter the gate angle for various product widths on the fly.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-75 the Right Cylinder?
Size this 125 mm bore against the 100 mm option, which offers 3927 N push at 0.5 MPa, or step up if you need the absolute maximum 1251 kgf at 1.0 MPa. The adjustable stroke is ideal for sharing a single spare across multiple stroke variants or fine-tuning the end position during machine commissioning. Choose from basic, FA, LB, TC, TCM1, or TCM2 mounts. Because the stroke is 300 mm, always support the load with an external guide to prevent rod bending and side-load wear. Add an external rod lock or pilot-operated check valve if you need to hold a load, as the air cushion only decelerates and the piston will drift on air loss.
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 JSIJ125X300-75 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa it provides 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. The operating speed range is 30-500 mm/s.
The nominal 300 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke by up to 75 mm on-site, giving a usable forward range of 225-300 mm. The retract end is fixed, and this stop sets the end position rather than locking the load.
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Covers non-human-caused product damage.
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