This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1700, 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 SI125X1700
The AirTAC SI125 Standard Cylinder SI125X1700 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1700mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1700, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1700
- 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 SI125X1700
The AirTAC SI125X1700 is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 1700mm stroke. Because 1700mm exceeds the 1500mm standard maximum for this bore, it is a non-standard, made-to-order unit. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. As an end-of-life product, it must be replaced by the direct replacement SAI125X1700.
The SAI125X1700 shares the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This SKU lacks a magnet (-S) and cannot take a sensor.
Airtac SI125 Standard Cylinder SI125X1700 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1700 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1700 |
| Bore size | Ø125 mm |
| Stroke | 1700 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 SAI125X1700 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 SAI125X1700 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 SI125X1700
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1700 | 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 SI125X1700 Is Used
Long-Stroke Material Pusher
Uses the 1700mm extension to transfer heavy pallets or workpieces between conveyor lines, relying on the 6136 N push force at 0.5 MPa to overcome sliding friction.
Large Press Ejection
Ejects formed parts from heavy machinery, utilizing the adjustable 40mm air cushions at both ends to decelerate the 125mm piston smoothly at high speeds.
Replacing the Airtac SI125 Standard Cylinder SI125X1700 with the SAI125X1700
To replace the SI125X1700, order the SAI125X1700. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/2 port, and the M27x2 rod thread. Since this is a 1700mm non-standard stroke exceeding the 1500mm max, specify made-to-order. At 1700mm, side-load and rod-bending risks are high; use external guides to prevent piston wear. If sizing down, a 100mm bore yields 3927 N push at 0.5 MPa; sizing up to 160mm yields 10053 N. This SKU has no magnet, so CS1-B/DS1-B sensors cannot be fitted. For load holding on air loss, use an external rod lock or pilot check valve, or specify the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1700
- ✓ 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 SI125X1700 FAQ
Yes, the SI125X1700 is discontinued. The direct replacement is the SAI125X1700. It is dimensionally interchangeable per ISO 15552, matching the 125mm bore, 1700mm stroke, 6136 N force, G1/2 port, and mounting accessories.
It features a G1/2 port and M27x2 rod thread. Force ratings are: 6136 N push and 5734 N pull at 0.5 MPa; 8590 N push at 0.7 MPa; 11045 N push at 0.9 MPa; with a theoretical max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1700
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1700 replacement — usually within 7-8 hours.