This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX280STC, 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 SI160BX280STC
The AirTAC Airtac SI160 Standard Cylinder SI160BX280STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 280mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX280STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke280 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX280STC
- 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 SI160BX280STC
The AirTAC SI160BX280STC is a discontinued double-acting ISO 15552 profile cylinder featuring a 160 mm bore, 280 mm stroke, SUS304 stainless steel rod and a TC trunnion mount. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160BX280STC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces lock and clamp variants (SAIL, BSAI) absent in the SI line.
Airtac SI160 Standard Cylinder SI160BX280STC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX280STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX280STC |
| Bore size | Ø160 mm |
| Stroke | 280 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 SAI160BX280STC 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 SAI160BX280STC 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 SI160BX280STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×280 | 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 SI160BX280STC Is Used
Heavy Stamp Press Feed
Drives robust 512 kg vertical lift actuators in metal forming lines, utilising the 10053 N push force at 0.5 MPa to move heavy billets into the press bed.
Pallet Discharge Gate
Operates high-mass routing gates on automated conveyors, where the TC trunnion mount absorbs pivotal stress and the SUS304 rod resists plant humidity.
Mould Clamp Actuation
Secures large injection mould bases with 14074 N force at 0.7 MPa, relying on the 50 mm adjustable air cushions to decelerate the 40 mm rod at stroke ends.
Replacing the Airtac SI160 Standard Cylinder SI160BX280STC with the SAI160BX280STC
To replace the SI160BX280STC, order the SAI160BX280STC. Verify the ISO 15552 TC trunnion interface, 160 mm bore, 280 mm stroke, G3/4 port (PT/G/NPT thread options) and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If you need to adjust force, the neighbouring 125 mm bore yields 6136 N push at 0.5 MPa, while the 200 mm bore yields 15708 N. At 0.7 MPa this 160 mm bore generates 14074 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variant. With a 280 mm stroke, ensure adequate guide support to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX280STC
- ✓ 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 SI160BX280STC FAQ
Yes, the SI160BX280STC is discontinued. The direct replacement is the SAI160BX280STC. It shares the identical ISO 15552 mounting interface, 160 mm bore, 280 mm stroke, G3/4 port and TC trunnion mount, fitting directly into existing fixtures.
The G3/4 port feeds a 40 mm rod delivering 10053 N push and 9425 N pull at 0.5 MPa. At 0.7 MPa push is 14074 N, at 0.9 MPa it is 18095 N, and the theoretical max is 2050 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX280STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX280STC replacement — usually within 7-8 hours.