This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX55, 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 SI160BX55
The AirTAC Airtac SI160 Standard Cylinder SI160BX55 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX55, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX55
- 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 SI160BX55
The AirTAC SI160BX55 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 55 mm stroke. It delivers a push force of 10053 N at 0.5 MPa. The direct replacement is the SAI160BX55, which shares the exact same ISO 15552 mounting interface, bore, stroke, output force, and G3/4 port size to fit existing fixtures seamlessly.
This specific SKU features a SUS304 stainless steel rod for corrosion resistance and lacks a magnet, meaning it cannot accept a position switch. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life.
Airtac SI160 Standard Cylinder SI160BX55 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX55 |
| Bore size | Ø160 mm |
| Stroke | 55 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 SAI160BX55 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 SAI160BX55 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 SI160BX55
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×55 | 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 SI160BX55 Is Used
Heavy Press Operations
Generates up to 18095 N at 0.7 MPa for robust clamping and forming tasks in automated metalworking presses.
Pallet Dispensers
Provides the high push force needed to index heavy loaded pallets, utilizing the durable SUS304 stainless rod.
Material Lifts
Drives vertical elevation platforms handling loads up to 512 kg safely, relying on adjustable 50 mm cushions.
Replacing the Airtac SI160 Standard Cylinder SI160BX55 with the SAI160BX55
To replace the discontinued SI160BX55, order the SAI160BX55. Verify your ISO 15552 mounting interface (such as LB foot or TC trunnion), the 55 mm stroke, and the G3/4 port thread (PT/G/NPT). Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, select an SAI equivalent with a magnet. Sizing both ways: the 160 mm bore yields 10053 N push at 0.5 MPa, while the neighbouring 125 mm bore offers 6136 N. Note that a plain cylinder drifts without live air; for load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants. The SAI family also adds the SAIF self-valve option, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX55
- ✓ 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 SI160BX55 FAQ
Yes, the SI160BX55 is discontinued. The direct replacement is the SAI160BX55. It is dimensionally interchangeable per ISO 15552, maintaining the same 160 mm bore, 55 mm stroke, force, and G3/4 port to fit your existing fixtures.
This double-acting cylinder uses a G3/4 air port. It delivers a push force of 10053 N and a pull force of 9425 N at 0.5 MPa. At 0.7 MPa the push force is 14074 N, and the theoretical maximum is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX55 replacement — usually within 7-8 hours.