Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-100S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-100S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 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 JSIJ125X275-100S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder saves machine space because it is shorter than a same-bore ISO 15552 unit. The hard-anodized aluminium barrel has no external tie rods, and the G1/2 port handles high flow. A built-in magnet (-S) lets you fit CMSE or DMSE switches directly into the side grooves.
The external stop screw provides a 100 mm on-site extend-shortening window, so the usable forward stroke spans 175 to 275 mm without swapping the cylinder. This lets you fine-tune the end position on the floor while sharing one spare across stroke variants. In practice it handles about 3682 N of real work, roughly 313 kg lifted vertically with a 2:1 margin. The retract end is fixed, and the 33 mm adjustable air cushions only decelerate the load.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-100S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-100S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 JSIJ125X275-100S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×275 | 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 JSIJ125X275-100S Is Used
Press Tonnage Tuning
Dial in the exact 175 to 275 mm extend reach on a heavy stamping press without machining new spacers, using the 100 mm external adjuster.
Pallet Positioning Stop
Fine-tune the stopping height for varying pallet sizes on a high-force conveyor line, leveraging the 6136 N push capacity.
Shared Spare Inventory
Keep one cylinder as a universal spare for multiple 275 mm stations, shortening the extend stroke on-site to match each machine.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X275-100S the Right Cylinder?
If 6136 N at 0.5 MPa is too much, step down to the 80 mm bore for 2513 N; if you need more, this 125 mm is the top edge. The 100 mm adjust window is ideal when you need on-site end-position tuning across slightly different machine setups. Mounting options include FA, LB, TC, TCM1, and TCM2. The -S suffix means the magnet is present for CMSE/DMSE sensors. For any stroke over 300 mm, guide the load to prevent rod side-loading.
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 JSIJ125X275-100S 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 is 1251 kgf at 1.0 MPa. It uses a G1/2 port and an M27x2.0 rod thread.
The nominal 275 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 100 mm, giving a usable range of 175 to 275 mm. The retract end is fixed. This stop sets the end position but 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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