This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1700S, 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 SI50 Standard Cylinder SI50X1700S
The AirTAC SI50 Standard Cylinder SI50X1700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1700S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1700S
- 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 SI50 Standard Cylinder SI50X1700S
The AirTAC SI50X1700S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1700mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. Because 1700mm exceeds the 1200mm standard maximum, this is a non-standard made-to-order length requiring external guides to prevent rod bending. AirTAC replaced this EOL unit with the SAI50X1700S.
The SAI50X1700S is a direct replacement matching the ISO 15552 mounting interface, bore, stroke, force and port. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X1700S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1700S |
| Bore size | Ø50 mm |
| Stroke | 1700 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X1700S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X1700S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X1700S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | 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 SI50 Standard Cylinder SI50X1700S Is Used
Long-Reach Diversion
Drives a 1700mm travel diverter arm on a packaging conveyor, using the 982N push force at 0.5MPa to swing goods between lanes.
High-Bay Extraction
Extracts totes from deep shelving racks, where the 50kg safe vertical lift capacity and extended stroke reach deep storage bins.
Material Push-Off
Pushes accumulated workpieces off an assembly bed over a long 1.7m distance, relying on external guides to prevent rod bending.
Replacing the Airtac SI50 Standard Cylinder SI50X1700S with the SAI50X1700S
To replace the SI50X1700S, order the SAI50X1700S direct equivalent, confirming the ISO 15552 mounting interface, G1/4 port, M16x1.5 rod thread and -S magnet. Because this 1700mm stroke exceeds the 1200mm standard, it is non-standard and requires external guides to manage side-load and rod-bending risks. If you need more force, the neighbouring 63mm bore offers 1559N push at 0.5MPa; if less is needed, the 40mm bore provides 628N. A plain cylinder drifts on air loss as the cushion only decelerates, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1700S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X1700S FAQ
Yes, the SI50X1700S is discontinued. The direct replacement is the SAI50X1700S. It shares the same ISO 15552 mounting interface, 50mm bore, 1700mm stroke, output force, G1/4 port and accessories, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/4 air port. The thrust ratings are 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1700S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1700S replacement — usually within 7-8 hours.