This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X425S, 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 SI160X425S
The AirTAC SI160 Standard Cylinder SI160X425S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 425mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X425S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X425S
- 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 SI160X425S
The AirTAC SI160X425S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 425 mm stroke. Delivering 10053 N push force at 0.5 MPa, it features a G3/4 port, M36x2 rod thread, and a built-in magnet for legacy CS1-B/DS1-B sensors. The current-production direct replacement is the SAI160X425S, matching the exact bore, stroke, force, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life, while retaining the 50 mm adjustable air cushions. The SAI family also adds SAIL and BSAI lock variants absent in the SI line, and a Viton H seal option raises operating temperatures to 150 C.
Airtac SI160 Standard Cylinder SI160X425S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X425S |
| Bore size | Ø160 mm |
| Stroke | 425 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 SAI160X425S 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 SAI160X425S 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 SI160X425S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×425 | 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 SI160X425S Is Used
Heavy Press Clamping
Generates 14074 N of thrust at 0.7 MPa to secure large metal castings or heavy assemblies during machining and pressing operations.
Long-Stroke Lowering
Utilizes the 425 mm stroke to lower heavy pallets or machinery components smoothly, relying on the 50 mm adjustable cushions for end-of-stroke deceleration.
Industrial Automation
Drives substantial linear motion tasks in robust manufacturing lines where a 160 mm bore and G3/4 port deliver high-volume pneumatic power.
Replacing the Airtac SI160 Standard Cylinder SI160X425S with the SAI160X425S
To replace the SI160X425S, order the SAI160X425S, confirming the ISO 15552 mounting interface, 425 mm stroke, G3/4 port, and the -S magnet for current AirTAC switches. When sizing, the 125 mm bore offers 6136 N push at 0.5 MPa, while the 200 mm bore provides 15708 N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. Because 425 mm exceeds 300 mm, add external guides to prevent rod bending and side-load wear. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X425S
- ✓ 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 SI160X425S FAQ
Yes, the SI160X425S is discontinued. The direct replacement is the AirTAC SAI160X425S. It is dimensionally interchangeable per ISO 15552, keeping the same 160 mm bore, 425 mm stroke, 10053 N force, G3/4 port, and mounting fixtures.
The 160 mm bore features a G3/4 port and delivers a push force of 10053 N and pull of 9425 N at 0.5 MPa. At 0.7 MPa push is 14074 N, and 18095 N at 0.9 MPa. The theoretical maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X425S replacement — usually within 7-8 hours.