Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-30S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-30S 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 JSIJ125X300-30S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder handles heavy automation tasks with ease. The hard-anodized aluminum barrel keeps the unit more compact than a same-bore ISO 15552 cylinder. It integrates a built-in piston magnet for CMSE/DMSE sensors and features a G1/2 port.
The external stop screw lets you shorten the extend stroke on-site by up to 30 mm, giving a usable range of 270 to 300 mm without changing the hardware. This on-site tuning is ideal for shared spares across stroke variants. Based on the 0.5 MPa push rating, it manages a safe working load of about 3682 N, lifting roughly 313 kg vertically with a 2:1 margin.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-30S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-30S |
|---|---|
| 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 JSIJ125X300-30S
| 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 JSIJ125X300-30S Is Used
Heavy Pallet Lifts
Raises loaded pallets in packaging lines, using the 30 mm adjuster to dial in the exact raise height for different box sizes.
Press Tonnage Setup
Provides 6136 N of thrust for light pressing tasks, letting operators tweak the extend end-position to accommodate varying material thicknesses.
Automated Storage Retrieval
Actuates heavy shelving pushers in ASRS units, relying on the compact JIS profile to save valuable machine bay length.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X300-30S the Right Cylinder?
When sizing this unit, the 100 mm bore offers 3927 N push at 0.5 MPa for lighter jobs, while the 125 mm bore maxes out the standard range at 6136 N. The adjustable stroke window shines when you need to fine-tune end positions on-site or want a single spare covering several stroke variants. Mounting options include FA, LB, TC, TCM1, and TCM2. The -S suffix confirms the magnet is present for CMSE/DMSE sensors. Because the stroke is 300 mm, always support the load with an external guide to prevent rod bending under side loads.
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 JSIJ125X300-30S 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 max force is 1251 kgf at 1.0 MPa. It uses a G1/2 port, a 32 mm rod, and operates at 30-500 mm/s.
The external stop screw lets you shorten the extend stroke by up to 30 mm on-site, yielding a usable extend range of 270 to 300 mm. The nominal 300 mm stroke is the maximum, and the retract end remains fixed. The stop sets the end position but does not lock the load.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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