Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100 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 JSIJ125X250-100
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder is built for heavy-duty actuation without external tie rods. Its extruded hard-anodized aluminium barrel makes it shorter and more compact than a same-bore ISO 15552 unit. The G1/2 port feeds the 32 mm piston rod, yielding a safe working load of about 3682 N, which translates to lifting roughly 313 kg vertically with a 2:1 safety margin.
The JSIJ125X250-100 features an external adjuster that shortens the extend stroke on-site by up to 100 mm, giving a usable extend range of 150-250 mm while the retract end remains fixed. You can fine-tune the end position without swapping the cylinder. This non-magnetic SKU cannot take a sensor; adding the -S variant enables CMSE/DMSE switches. Note that the adjustable stop sets position only, so fit an external rod lock or pilot-operated check valve to hold a load on air loss.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100 Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100 |
|---|---|
| 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 JSIJ125X250-100
| 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 JSIJ125X250-100 Is Used
Press Tonnage Trimming
Use the 100 mm external adjuster to dial in the exact extend contact point on heavy stamping or pressing tasks, accommodating different material thicknesses without changing the cylinder.
Pallet Positioning Stop
Act as a robust 125 mm bore stopper in high-flow logistics lines, retracting fixed and extending between 150 and 250 mm to halt varying pallet sizes gently using the 33 mm adjustable cushions.
Heavy Mold Ejection
Drive large injection mold ejections where the 6136 N push force at 0.5 MPa is required, tweaking the extend stroke on-site to match specific mold depths and prevent over-travel.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100 the Right Cylinder?
Size this 125 mm bore against the 100 mm option, which offers 3927 N push at 0.5 MPa, or step up if you need the absolute maximum 1251 kgf at 1.0 MPa. The 100 mm adjuster window is ideal when you need to share one spare cylinder across several stroke variants or fine-tune the extend end position on-site. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2. Because this is a non-magnet SKU, it cannot accept position sensors; select the -S version for CMSE/DMSE switches. For any stroke of 300 mm or longer, always guide the load to prevent excessive side-load wear on the rod seals.
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 JSIJ125X250-100 FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull; at 0.7 MPa it yields 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 port, a 32 mm rod with an M27x2.0 thread, and has 33 mm adjustable air cushions at both ends.
The nominal 250 mm extend stroke is the maximum. An external stop screw lets you shorten the extend stroke on-site by up to 100 mm, giving a usable extend range of 150-250 mm for precise end-position tuning. The retract end is fixed, and the stop mechanism only sets position, it does not lock the load.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC JSI Cylinders
Request a Quote for Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X250-100
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.