This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X1000-20S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X1000-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X1000-20S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S
The AirTAC SIJ125X1000-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 980-1000 mm window from the 1000 mm nominal maximum. The 125 mm bore features a G1/2 port, M27x2 rod thread, and 40 mm adjustable cushions. The direct replacement is the SAIJ125X1000-20S, sharing the same interface, force, and port.
The SAIJ successor incorporates an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors. Note that the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X1000-20S |
| Bore size | Ø125 mm |
| Stroke | 1000 mm |
| Acting type | Double acting |
| 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, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ125X1000-20S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
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 | |
The SAIJ125X1000-20S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S Is Used
Press Stroke Calibration
Fine-tune the extend endpoint within a 980-1000 mm window on-site to accommodate varying material thicknesses in large format pressing equipment.
Long-Transfer Diverter
Adjust the extend stop by up to 20 mm to precisely set the diverter position without repositioning the ISO 15552 mountings along the conveyor line.
Pallet Positioning Stop
Dial in the exact 980-1000 mm stopping point for oversized pallets, using the external screw to adapt to different pallet dimensions quickly.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S with the SAIJ125X1000-20S
To replace the discontinued SIJ125X1000-20S, specify the direct replacement SAIJ125X1000-20S, which preserves the ISO 15552 mounting interface, 125 mm bore, 1000 mm stroke, 20 mm adjust window, and G1/2 port. Choose the 20 mm adjust window if you need precise 980-1000 mm extend endpoint tuning without custom machining. Mounting options include FA, LB, and TC brackets. The -S magnet supports legacy CS1-B/DS1-B switches (the SAIJ uses current switches). Because the stroke is 1000 mm, ensure external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X1000-20S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20S FAQ
Yes, the SIJ125X1000-20S is discontinued. The direct replacement is the SAIJ125X1000-20S. It shares the same ISO 15552 interface, 125 mm bore, 1000 mm stroke, 20 mm adjust window, and G1/2 port, but features an upgraded piston seal.
The external stop screw window is 20 mm, allowing the extend stroke to be trimmed from 1000 mm down to 980 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X1000-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X1000-20S replacement — usually within 7-8 hours.