This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X550H, 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 SI160 Standard Cylinder SI160X550H
The AirTAC SI160 Standard Cylinder SI160X550H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 550mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X550H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke550 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X550H
- 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 SI160 Standard Cylinder SI160X550H
The AirTAC SI160X550H is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 550mm stroke. Generating 10053N push force at 0.5MPa, it is replaced directly by the SAI160X550H. This direct successor maintains the exact G3/4 port, M36x2 thread, and mounting interface. The H designation indicates a Viton H high-temperature seal, extending operation to 150C.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure. Without a -S magnet, this SKU cannot take a sensor. For load holding, the SAIL lock or BSAI clamp-lock variants are recommended, as standard cushions only decelerate.
Airtac SI160 Standard Cylinder SI160X550H Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X550H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X550H |
| Bore size | Ø160 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI160X550H carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAI160X550H produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI160 Standard Cylinder SI160X550H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×550 | 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 SI160 Standard Cylinder SI160X550H Is Used
Heavy Press Forming
Delivers 14074N at 0.7MPa for heavy-duty metal pressing, utilizing the 50mm adjustable air cushions to decelerate the massive 160mm piston at stroke ends.
Pallet Lifting
Raises substantial loads with a safe working capacity near 6032N, requiring external guides to manage the 550mm stroke and prevent rod bending under lateral stress.
High-Tactuation Ejection
Ejects dense molded parts from heated environments up to 150C using the Viton H seal, operating at speeds between 30-500mm/s without sensor feedback.
Replacing the Airtac SI160 Standard Cylinder SI160X550H with the SAI160X550H
To replace the SI160X550H, order the SAI160X550H, confirming the ISO 15552 interface, 160mm bore, 550mm stroke, G3/4 port, and Viton H seal. This SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. Because the 550mm stroke exceeds 300mm, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss, so for load holding choose the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X550H
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI160 Standard Cylinder SI160X550H FAQ
Yes, the AirTAC SI160X550H is discontinued. The direct replacement is the SAI160X550H. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 550mm stroke, output force, G3/4 port, and mounting fixtures.
The 160mm bore features a G3/4 port and M36x2 rod thread. It generates 10053N push and 9425N pull at 0.5MPa, 14074N push at 0.7MPa, 18095N push at 0.9MPa, and a maximum theoretical force of 2050kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X550H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X550H replacement — usually within 7-8 hours.