This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1600, 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 SI125X1600
The AirTAC SI125 Standard Cylinder SI125X1600 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1600mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1600, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1600
- 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 SI125X1600
The AirTAC SI125X1600 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 1600 mm stroke. Because 1600 mm exceeds the 1500 mm standard maximum, this is a non-standard made-to-order unit. It delivered 6136 N push force at 0.5 MPa through a G1/2 port.
The direct replacement is the SAI125X1600. It shares the exact ISO 15552 mounting interface, M27x2 rod thread, and force class. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note this SKU lacks the -S magnet and cannot take a CS1-B/DS1-B sensor.
Airtac SI125 Standard Cylinder SI125X1600 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1600 |
| Bore size | Ø125 mm |
| Stroke | 1600 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 SAI125X1600 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 SAI125X1600 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 SI125X1600
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1600 | 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 SI125X1600 Is Used
Long-Stroke Material Transfer
Drives heavy pallets across extended machining centers, utilizing the 6136 N thrust at 0.5 MPa to push loads securely over the full 1600 mm travel.
Large Assembly Press
Actuates large fixture clamps or positioning arms where a robust 125 mm bore and 40 mm adjustable cushion are needed to decelerate heavy masses.
Replacing the Airtac SI125 Standard Cylinder SI125X1600 with the SAI125X1600
To replace the SI125X1600, order the SAI125X1600. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.) and the G1/2 port. Because this is a 1600 mm non-standard stroke exceeding the 1500 mm max, specify made-to-order and add an external guide to prevent rod bending under side loads. Sizing both ways: the neighboring 100 mm bore yields 3927 N [email protected], while the 160 mm bore yields 10053 N. A plain cylinder drifts without live air; for load holding use an external pilot check valve or the SAIL/BSAI lock variants. The SAI family also adds the SAIF valve variant, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1600
- ✓ 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 SI125X1600 FAQ
Yes, the SI125X1600 is discontinued. The direct replacement is the SAI125X1600. It is dimensionally interchangeable per ISO 15552, maintaining the same bore, stroke, force, G1/2 port, and mounting interface.
It features a 32 mm rod, M27x2 thread, 40 mm cushion, and speed of 30-500 mm/s. Force ratings are: push 6136 N and pull 5734 N at 0.5 MPa, push 8590 N at 0.7 MPa, push 11045 N at 0.9 MPa, and a theoretical max of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1600
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1600 replacement — usually within 7-8 hours.