Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 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 JSIJ125X125-75S
Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore JIS profile cylinder brings heavy-duty actuation into a compact footprint that is noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminum extruded barrel houses a 32 mm rod, and the body accepts G1/2 ports. Because the external stop screw lets you trim the extend stroke by up to 75 mm on-site, the usable forward travel spans 50 to 125 mm while the retract end remains fixed.
With a safe working load around 3682 N, it handles roughly 313 kg lifted vertically with a 2:1 margin. The integrated -S piston magnet supports CMSE and DMSE sensors that mount directly into the side grooves for precise position detection. Remember that the adjustable stop only sets the end position; a plain cylinder drifts on air loss, so fit an external rod lock or pilot-operated check valve if you need to hold a suspended load.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 JSIJ125X125-75S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×125 | 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 JSIJ125X125-75S Is Used
Press Clamping
Dial in the exact 50 to 125 mm clamping reach via the external screw to accommodate varying workpiece heights on a heavy press line.
Pallet Positioning
Shorten the extend stroke on-site to push loaded pallets into a tight staging zone without swapping out the entire actuator.
Heavy Lowering
Lower heavy fixtures with controlled force, using the adjustable stop to set a precise resting height before the retract cycle.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X125-75S the Right Cylinder?
When sizing this unit, the 80 mm bore offers 2513 N push at 0.5 MPa for lighter frames, while the 125 mm bore maxes out the standard single-rod range at 6136 N. The -75 mm adjuster is ideal when you need to fine-tune the extend end position on the machine or want a single shared spare across slightly different stroke variants. You can mount it via FA, LB, TC, TCM1, or TCM2 brackets. The built-in -S magnet works seamlessly with CMSE/DMSE switches. For any stroke at or above 300 mm, always use a guide rail to prevent 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 JSIJ125X125-75S FAQ
This 125 mm bore cylinder uses a G1/2 port. It generates 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push and 8028 N pull at 0.7 MPa, with a theoretical maximum of 1251 kgf at 1.0 MPa.
The nominal 125 mm extend stroke is the maximum. The external stop screw lets you shorten the forward travel by up to 75 mm on-site, giving a usable extend range of 50 to 125 mm. The retract end is fixed, and this mechanism sets end position rather than locking the load.
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