Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-50
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-50 is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 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 JSIJ125X250-50
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a compact footprint. The extruded hard-anodized aluminium profile barrel makes it noticeably shorter than a same-bore ISO 15552 cylinder. It handles about 3682 N of real work safely, which translates to lifting roughly 313 kg vertically with a 2:1 margin.
A G1/2 port feeds the 32 mm rod, and an external adjuster lets you shorten the extend stroke on-site by up to 50 mm. The nominal 250 mm stroke remains the maximum, yielding a usable 200-250 mm window for fine-tuning the end position without swapping the cylinder. Note that this plain SKU lacks a magnet and cannot take a sensor; the -S variant is required for CMSE/DMSE switches.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-50 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-50 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 JSIJ125X250-50
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×250 | 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 JSIJ125X250-50 Is Used
Heavy Pallet Lift
Raises loaded pallets in distribution hubs, using the 50 mm extend adjuster to dial in the exact raise height for different dock levels.
Press Fit Tuning
Seats large bearings or housings, relying on the 6136 N push force and adjusting the extend stop to control the final pressing depth.
Stamping Stop
Acts as a heavy-duty end stop in metal forming lines, using the on-site stroke window to set precise material positioning without changing actuators.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-50 the Right Cylinder?
Size this 125 mm bore against the 100 mm option, which yields 3927 N of push at 0.5 MPa. If you need more power than the 6136 N offered here, you are at the top edge of the range. The 50 mm adjuster is ideal for sharing a single spare across slightly different stroke variants or tuning end positions on-site. Mounting options include FA, LB, TC, TCM1, and TCM2. Because this is a 250 mm stroke, guide the load to prevent side-load wear. Remember that the air cushion only decelerates; use an external rod lock or pilot-operated check valve to hold a load securely.
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 JSIJ125X250-50 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. This 125 mm bore cylinder uses a G1/2 air port and a 32 mm rod with an M27x2.0 thread.
An external stop screw lets you shorten the extend stroke on-site by up to 50 mm. The nominal 250 mm stroke is the maximum, so the usable extend range is 200-250 mm. The retract end is fixed, and this stop only sets the end position; it does not lock the load.
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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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