This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X45S, 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 SI32X45S
The AirTAC SI32 Standard Air Cylinder SI32X45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 45mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke45 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X45S
- 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 SI32X45S
The AirTAC SI32X45S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 45mm stroke, delivering 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32X45S, a direct replacement retaining the exact mounting interface, bore, stroke, output force, and port size. The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for lower start-up pressure and extended service life.
This unit includes a piston magnet for legacy CS1-B/DS1-B sensors, whereas the SAI family utilizes current AirTAC switches. Note that a standard cylinder cannot hold a load without live air; the cushions only decelerate the piston near stroke end. For secure load holding, consider the SAIL or BSAI lock variants.
Airtac SI32 Standard Air Cylinder SI32X45S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X45S |
| Bore size | Ø32 mm |
| Stroke | 45 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 SAI32X45S 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 SAI32X45S 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 SI32X45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×45 | 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 SI32X45S Is Used
Clamp Actuation
Provides reliable clamping force for small jigs and fixtures where a compact 32mm bore and precise short-stroke movement are required.
Diverting Mechanism
Drives small diverter gates on conveyor lines, utilizing the magnet-equipped piston for position confirmation via CS1-B/DS1-B sensors.
Replacing the Airtac SI32 Standard Air Cylinder SI32X45S with the SAI32X45S
To replace the discontinued SI32X45S, order the SAI32X45S direct equivalent, verifying the ISO 15552 mounting interface, 32mm bore, 45mm stroke, G1/8 port, and the -S magnet requirement. When sizing, check neighboring bores: a 40mm bore yields 628N push at 0.5MPa if more force is needed, while stepping down is not an option below 32mm. Because this is a double-acting cylinder, it will drift if air pressure is lost or the valve is centered, as the adjustable 27mm air cushions only decelerate the rod near the end of travel. For applications requiring locked positioning, select the SAIL (air-released lock) or BSAI (clamp-lock) variants, or install an external pilot check valve. The standard speed range is 30-800mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X45S
- ✓ 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 SI32X45S FAQ
Yes, the SI32X45S is discontinued. The direct replacement is the AirTAC SAI32X45S. It shares the identical ISO 15552 mounting interface, 32mm bore, 45mm stroke, output force, and G1/8 port, fitting directly into existing fixtures.
The 32mm bore features a G1/8 port and a 12mm rod. It delivers 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical maximum of 82kgf at 1.0MPa.
Request a Quote for the SAI32X45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X45S replacement — usually within 7-8 hours.