This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X155S, 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 SI32X155S
The AirTAC SI32 Standard Air Cylinder SI32X155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 155mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke155 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X155S
- 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 SI32X155S
The AirTAC SI32X155S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 155mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. The direct replacement is the SAI32X155S, matching the bore, stroke, output, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S SKU uses legacy CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32X155S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X155S |
| Bore size | Ø32 mm |
| Stroke | 155 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 SAI32X155S 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 SAI32X155S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32X155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×155 | 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 SI32X155S Is Used
Small Part Ejection
Ideal for pushing light machined components out of a fixture using the 402N push force at 0.5MPa.
Package Diverting
Actuates a routing gate on a packaging line, with the 155mm stroke providing precise routing distance.
Clamp Actuation
Secures thin workpieces in light assembly jigs where a compact 32mm bore and 345N pull force are required.
Replacing the Airtac SI32 Standard Air Cylinder SI32X155S with the SAI32X155S
To replace this SI32X155S, order the SAI32X155S. Verify the ISO 15552 mounting interface, 32mm bore, 155mm stroke, G1/8 port (PT/G/NPT thread options), and the -S magnet for position sensing. The SAI accepts current AirTAC switches, whereas the SI used CS1-B/DS1-B. For sizing, neighboring bores (40mm) offer higher force (628N push at 0.5MPa), while 0.7MPa yields 563N on the 32mm. A plain cylinder drifts on air loss as cushions only decelerate; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. For this 155mm stroke, ensure guide alignment to prevent rod bending side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X155S
- ✓ 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 SI32X155S FAQ
Yes, the AirTAC SI32X155S is discontinued. The direct replacement is the SAI32X155S. It features the same ISO 15552 mounting interface, 32mm bore, 155mm stroke, output force, and G1/8 port, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/8 port. It provides 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, and a theoretical maximum force of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X155S replacement — usually within 7-8 hours.