This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX850S, 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 SI32 Standard Air Cylinder SI32BX850S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX850S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 850mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX850S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke850 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX850S
- 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 SI32 Standard Air Cylinder SI32BX850S
The AirTAC SI32BX850S is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, SUS304 stainless steel rod, and an 850mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. The drop-in replacement is the SAI32BX850S, matching the interface, bore, stroke, and force exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For this bore, a safe working load is roughly 241N (about 60% of the 402N figure), equating to a 20kg vertical lift with a 2:1 margin. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI variants the SI lacked.
Airtac SI32 Standard Air Cylinder SI32BX850S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX850S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX850S |
| Bore size | Ø32 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32BX850S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32BX850S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32BX850S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×850 | 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 SI32 Standard Air Cylinder SI32BX850S Is Used
Long-Stroke Diversion
Pushes light packages across a conveyor belt over an 850mm reach, utilizing the SUS304 rod for corrosion resistance in washdown environments.
Vertical Lowering
Lowers a 20kg fixture with a 2:1 safety margin using the 402N push force at 0.5MPa, requiring a pilot check valve to prevent drift on air loss.
Lab Positioning
Actuates testing equipment over a long travel distance, benefiting from the 27mm adjustable air cushions at both ends to decelerate the load smoothly.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX850S with the SAI32BX850S
To replace the SI32BX850S, order the SAI32BX850S to retain the exact ISO 15552 mounting interface, 32mm bore, 850mm stroke, G1/8 port, and SUS304 rod. Because the 850mm stroke invites rod-bending, use external guides to prevent side loads. If sizing down, a 40mm bore offers 628N at 0.5MPa; if sizing up, verify fixture space. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or the SAIL lock variant for load holding. The -S magnet works with CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX850S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32BX850S FAQ
Yes, the SI32BX850S is discontinued. The exact drop-in replacement is the SAI32BX850S. It is dimensionally interchangeable per ISO 15552, keeping the same 32mm bore, 850mm stroke, G1/8 port, and mounting interface.
It uses a G1/8 air port. The force ratings are: 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX850S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX850S replacement — usually within 7-8 hours.