This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX25, 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 SI160BX25
The AirTAC Airtac SI160 Standard Cylinder SI160BX25 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 25mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX25, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke25 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX25
- 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 SI160BX25
The AirTAC SI160BX25 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 25 mm stroke. It delivers 10053 N push force at 0.5 MPa. The direct replacement is the SAI160BX25, sharing the exact ISO 15552 mounting interface, G3/4 port, and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This specific SKU uses a SUS304 stainless steel rod (-B) for corrosion resistance and lacks a magnet, so it cannot accept legacy CS1-B/DS1-B sensors. Note that plain cylinders do not hold load without live air; use an external rod lock or pilot check valve for holding.
Airtac SI160 Standard Cylinder SI160BX25 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX25 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX25 |
| Bore size | Ø160 mm |
| Stroke | 25 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 SAI160BX25 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 SAI160BX25 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 SI160BX25
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×25 | 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 SI160BX25 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping and forming dies requiring high push force over a very short 25 mm travel distance.
Pallet Stopper Gate
Acts as a rugged positioning stop or heavy gate actuator in high-mass conveyor lines, handling loads up to 6032 N safely.
Industrial Clamp Rig
Secures large fabricated steel components during welding or machining, utilizing the 9425 N pull force at 0.5 MPa.
Replacing the Airtac SI160 Standard Cylinder SI160BX25 with the SAI160BX25
To replace the discontinued SI160BX25, order the SAI160BX25. Confirm the ISO 15552 mounting interface, 160 mm bore, 25 mm stroke, and G3/4 port. This unit has a SUS304 (-B) rod and no magnet, meaning it cannot support CS1-B/DS1-B switches; if sensing is needed, select an SAI model with the -S magnet option. The 50 mm adjustable air cushions decelerate the load near stroke end but do not hold it—if load holding is required on air loss, use an external pilot check valve or explore the SAIL or BSAI lock variants. Operating speed is 30-500 mm/s. For sizing alternatives, a 125 mm bore yields 6136 N push at 0.5 MPa, while a 200 mm bore yields 15708 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX25
- ✓ 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 SI160BX25 FAQ
Yes, the AirTAC SI160BX25 is discontinued and end-of-life. The direct replacement is the SAI160BX25. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 25 mm stroke, G3/4 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
This 160 mm bore cylinder features a G3/4 air port and a 40 mm piston rod. At 0.5 MPa it provides 10053 N push and 9425 N pull force. At 0.7 MPa push is 14074 N, and at 0.9 MPa it is 18095 N. The theoretical maximum force is 2050 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX25
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX25 replacement — usually within 7-8 hours.