Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X500-50S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X500-50S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 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 JSIJ125X500-50S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a compact footprint that is physically shorter than a same-bore ISO 15552 cylinder. The hard-anodized extruded aluminum profile barrel houses a 32 mm rod with an M27x2.0 thread, operating at 30-500 mm/s through a G1/2 port. An integrated piston magnet allows CMSE/DMSE sensors to drop directly into the side grooves for precise position detection.
The -50 code defines an external stop screw window that lets you shorten the extend stroke by up to 50 mm on site, yielding a usable extend range of 450-500 mm while the retract end remains fixed. This on-site tuning is ideal for dialing in end positions without swapping hardware. Factoring in a 60% safety margin, it handles about 3682 N of real work, which translates to lifting roughly 313 kg vertically. Note that the 33 mm adjustable air cushions only decelerate the load near stroke end; a plain cylinder drifts on air loss, so fit an external rod lock or pilot-operated check valve for held loads.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X500-50S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X500-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 JSIJ125X500-50S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×500 | 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 JSIJ125X500-50S Is Used
Heavy Pallet Lifts
Raises loaded pallets in distribution hubs, using the 50 mm extend window to fine-tune the exact raising height for different dock levels.
Hydraulic Press Dwell
Drives a heavy forming press where the on-site stroke adjustment sets the precise material crush distance without re-mounting the actuator.
Mold Clamp Positioning
Extends to secure large injection molds, relying on the 6136 N thrust and the adjustable stop to accommodate varying mold widths.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X500-50S the Right Cylinder?
When sizing this 125 mm bore actuator, stepping down to an 80 mm bore yields 2513 N push at 0.5 MPa, whereas this model provides 6136 N push and 5734 N pull at the same pressure, with a theoretical maximum of 1251 kgf at 1.0 MPa. The external adjuster is a major selection advantage for shared spares across stroke variants, letting you fine-tune the extend end position by up to 50 mm without changing the cylinder body. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because the 500 mm stroke creates leverage, always support the rod against side-load bending and use external guides to prevent premature wear.
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 JSIJ125X500-50S 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 nominal 500 mm extend stroke is the maximum. The external adjuster lets you shorten the extend stroke by up to 50 mm on site, giving a usable extend range of 450-500 mm, while the retract end remains fixed.
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