This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1630, 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 SI125 Standard Cylinder SI125X1630
The AirTAC SI125 Standard Cylinder SI125X1630 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1630mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1630, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1630 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1630
- 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 SI125 Standard Cylinder SI125X1630
The AirTAC SI125X1630 is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 1630mm stroke. Because 1630mm exceeds the 1500mm standard maximum, this is a non-standard, made-to-order length. It delivers 6136N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI125X1630, which matches the exact ISO 15552 mounting interface, stroke, force, and accessories.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Since this specific SKU lacks the -S magnet, it cannot accept a position switch. The SAI family also introduces lock variants (SAIL, BSAI) absent in the legacy SI line.
Airtac SI125 Standard Cylinder SI125X1630 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1630 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1630 |
| Bore size | Ø125 mm |
| Stroke | 1630 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 SAI125X1630 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 SAI125X1630 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X1630
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1630 | 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 SI125 Standard Cylinder SI125X1630 Is Used
Long-Stroke Material Transfer
Drives heavy pallets across extended conveyor sections where the 6136N push force at 0.5MPa easily overcomes rolling friction over the full 1630mm travel.
Large Assembly Press
Actuates heavy tooling plates over long distances, relying on the 125mm bore and 8590N push at 0.7MPa to seat large components securely.
Replacing the Airtac SI125 Standard Cylinder SI125X1630 with the SAI125X1630
To replace the SI125X1630, order the SAI125X1630. Confirm the ISO 15552 mounting interface, the G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). The SAI is dimensionally interchangeable per ISO 15552 and drops into existing fixtures. If you need position sensing, note this no-S SKU cannot take a sensor; you must select an SAI125X...S model. For sizing, neighboring bores are 100mm (3927N push @0.5MPa) and 160mm (10053N push @0.5MPa). Because this is a 1630mm non-standard stroke exceeding the 1500mm maximum, external guides are mandatory to prevent rod bending and excessive side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1630
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X1630 FAQ
Yes, the SI125X1630 is discontinued. The direct replacement is the SAI125X1630. It features the same ISO 15552 mounting interface, 125mm bore, 1630mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
The 125mm bore uses a G1/2 port, a 32mm rod, and operates at 30-500 mm/s. Force ratings are 6136N push and 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N push at 0.9MPa, and a theoretical max of 1251 kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1630
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1630 replacement — usually within 7-8 hours.