Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-50S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-50S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 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 JSIJ125X600-50S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS actuator brings heavy-duty motion into a compact profile barrel that is noticeably shorter than a same-bore ISO 15552 unit. It handles about 3682 N of real work safely, which means you can lift roughly 313 kg vertically with a 2:1 margin. The G1/2 port feeds the 32 mm rod, and the hard-anodized extruded aluminum body keeps the assembly rigid without external tie rods.
The 600 mm nominal extend stroke can be shortened on-site by up to 50 mm via an external adjuster, yielding a usable 550-600 mm window for fine-tuning the end position without swapping the cylinder. Because this is an -S SKU, a built-in piston magnet lets you drop CMSE or DMSE reed and electronic switches directly into the side grooves. Note that the adjustable stop only sets the end position; it does not hold the load on air loss, so fit an external rod lock or pilot-operated check valve for vertical safety.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-50S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 JSIJ125X600-50S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×600 | 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 JSIJ125X600-50S Is Used
Press Tonnage Adjustment
Dial in the exact 550-600 mm extend reach on a heavy stamping press, using the external adjuster to set the crush distance without re-mounting the entire 125 mm actuator.
Pallet Positioning Stop
Act as a robust 313 kg vertical lift stop in high-flow logistics conveyors, where the built-in magnet confirms the extended position via side-groove sensors.
Mold Height Tuning
Fine-tune the end-of-stroke mold height on large injection molding machinery, leveraging the 6136 N push force to shift heavy tooling within the 50 mm adjustment window.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X600-50S the Right Cylinder?
When sizing this actuator, stepping down to the 100 mm bore drops the 0.5 MPa push force to 3927 N, while the 125 mm class remains the top standard size offering 8590 N at 0.7 MPa. The 50 mm adjustable window is ideal for sharing a single spare across multiple stroke variants or dialing in a final end position on-site. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. The -S magnet supports CMSE/DMSE sensors. Because the 600 mm stroke creates a long lever arm, always support the rod against side-load bending and use an external guide rail to prevent premature seal 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 JSIJ125X600-50S FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull force. At 0.7 MPa it provides 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. It features a 125 mm bore, a 32 mm rod with an M27x2.0 thread, a G1/2 port, and 33 mm adjustable air cushions at both ends. Operating speed is 30-500 mm/s.
The 600 mm nominal stroke is the maximum extend length. The external -50 adjuster lets you shorten the extend stroke on-site by up to 50 mm, giving a usable range of 550-600 mm. The retract end remains fixed. This mechanism only trims the end position and does not lock the load; you must use a pilot-operated check valve or external rod lock to hold a load safely.
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