This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1600S, 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 SI50X1600S
The AirTAC SI50 Standard Cylinder SI50X1600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1600S
- 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 SI50X1600S
The AirTAC SI50X1600S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1600mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. Because 1600mm exceeds the 1200mm standard maximum, this is a non-standard made-to-order length. AirTAC replaced the SI line with the SAI family, making SAI50X1600S the direct replacement with the same ISO 15552 mounting interface, bore, output force, and accessories.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The original SI-SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. You can also specify Viton H seals for high-heat environments.
Airtac SI50 Standard Cylinder SI50X1600S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1600S |
| Bore size | Ø50 mm |
| Stroke | 1600 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 SAI50X1600S 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 SAI50X1600S 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 SI50X1600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | 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 SI50 Standard Cylinder SI50X1600S Is Used
Long-Reach Diversion
Pushes heavy packages across extended conveyor lanes over the full 1600mm travel distance.
High-Bay Extraction
Extracts pallets or totes from deep storage racking where a 50kg vertical lift capacity is required.
Material Transfer
Transfers workpieces between distant machine stations using the 982N push force at 0.5MPa.
Replacing the Airtac SI50 Standard Cylinder SI50X1600S with the SAI50X1600S
To replace the SI50X1600S, order the SAI50X1600S direct equivalent, verifying the ISO 15552 mounting interface, 50mm bore, 1600mm non-standard stroke, G1/4 port, and the -S magnet option. When sizing, consider neighbouring bores: a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore provides 1559N. Note that a plain cylinder does not hold load on air loss; the air cushion only decelerates near stroke end. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Because 1600mm is a long stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1600S
- ✓ 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 SI50X1600S FAQ
Yes, the SI50X1600S is discontinued. The direct replacement is the SAI50X1600S, which shares the identical ISO 15552 mounting interface, 50mm bore, 1600mm stroke, output force, and G1/4 port. You can install it directly into existing fixtures.
This 50mm bore double-acting cylinder features a G1/4 air port, a 20mm rod, and M16x1.5 rod thread. The thrust is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and 1767N push at 0.9MPa. The theoretical maximum force is 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1600S replacement — usually within 7-8 hours.