Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S
The AirTAC JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø100mm 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.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM26×1.5
- 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 JSIJ100X250-20S
The hard-anodized aluminum barrel keeps the total envelope more compact than a same-bore ISO 15552 unit, while the G1/2 port handles the necessary air volume. A built-in piston magnet (-S) allows CMSE or DMSE switches to drop directly into the side grooves for precise end-of-stroke detection.
The -20 code means an external adjuster can shorten the extend stroke on-site by up to 20 mm, giving a usable range of 230 to 250 mm without swapping the actuator. This on-site tuning is ideal for dialing in a final end position, and it lets you standardize one spare across multiple stroke variants.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M26×1.5 |
| 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 – 800 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3525 N | 3525 N |
| 0.7 MPa | 4935 N | 4935 N |
| Max (@1.0 MPa) | 719 kgf | |
JSIJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative).
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 100 | 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 JSIJ100X250-20S Is Used
Press Tonnage Trimming
Dial in the exact 230 to 250 mm extend contact point on-site to accommodate different material thicknesses in a stamping press without changing the entire actuator.
Pallet Stopper Calibration
Fine-tune the stopping height for varying pallet load sizes by adjusting the extend stroke window, ensuring precise alignment before stretch wrapping.
Heavy Diverter Positioning
Set the exact extend reach to deflect heavy 200 kg cartons onto a secondary line, using the adjuster to compensate for belt drift or guide wear.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ100X250-20S the Right Cylinder?
The adjustable stroke shines when you need to fine-tune the extend end position on-site or consolidate spares across slightly different stroke lengths. Mounting options include FA, LB, TC, TCM1, and TCM2 brackets. The -S suffix confirms the magnet is present for CMSE/DMSE sensors; a no-S SKU cannot accept them. For this 250 mm stroke, ensure external guide rails to absorb side loads and prevent rod binding.
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 JSIJ100X250-20S FAQ
The theoretical maximum force is 801 kgf at 1.0 MPa. This 100 mm bore unit uses a G1/2 air port, a 32 mm rod, and M26x1.5 rod threads.
The external stop screw lets you shorten the extend stroke by up to 20 mm on-site. The nominal 250 mm stroke is the maximum, so the usable extend range is 230 to 250 mm. The retract end remains fixed. Note that this stop only sets the end position; a plain cylinder does not hold load on air loss, so use an external rod lock or pilot-operated check valve for load holding.
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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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