This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X250STC, 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 SI160X250STC
The AirTAC SI160 Standard Cylinder SI160X250STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X250STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X250STC
- 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 SI160X250STC
The AirTAC SI160X250STC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 250 mm stroke. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. The direct replacement is the SAI160X250STC, retaining the same interface, M36x2 thread, and TC trunnion mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The -S code means a magnet for CS1-B/DS1-B sensors; SAI uses current switches. Viton H seals raise heat to 150 C.
Airtac SI160 Standard Cylinder SI160X250STC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X250STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X250STC |
| Bore size | Ø160 mm |
| Stroke | 250 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 SAI160X250STC 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 SAI160X250STC 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 SI160X250STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×250 | 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 SI160X250STC Is Used
Heavy Press Clamping
Generates 14074 N at 0.7 MPa to secure large steel fabrications during machining or welding operations.
Large Mold Ejection
Drives robust ejection strokes of 250 mm in injection molding cells, benefiting from the 50 mm adjustable cushions.
Replacing the Airtac SI160 Standard Cylinder SI160X250STC with the SAI160X250STC
To replace the SI160X250STC, order the SAI160X250STC. Confirm the ISO 15552 TC trunnion mounting, 250 mm stroke, G3/4 port, and the -S magnet. Sizing checks: a 200 mm bore gives more force, while a 125 mm bore offers 6136 N push at 0.5 MPa. The standard cylinder does not hold load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to prevent drift. The cushion only decelerates. Speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X250STC
- ✓ 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 SI160X250STC FAQ
Yes, the SI160X250STC is discontinued. The direct replacement is the SAI160X250STC. It is dimensionally interchangeable per ISO 15552, keeping the same 160 mm bore, 250 mm stroke, G3/4 port, and TC mounting.
It features a G3/4 port and delivers a push 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 SAI160X250STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X250STC replacement — usually within 7-8 hours.