This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X550, 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 SI32X550
The AirTAC SI32 Standard Air Cylinder SI32X550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 550mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke550 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X550
- 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 SI32X550
The AirTAC SI32X550 is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 550 mm stroke. It delivers 402 N push force at 0.5 MPa via a G1/8 port. The direct replacement is the SAI32X550, matching the bore, stroke, force, port and ISO 15552 mounting interface exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, unlike the CS1-B/DS1-B switches used on -S models.
Airtac SI32 Standard Air Cylinder SI32X550 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X550 |
| Bore size | Ø32 mm |
| Stroke | 550 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 SAI32X550 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 SAI32X550 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 SI32X550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×550 | 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 SI32X550 Is Used
Light-Part Ejection
Pushes small molded parts off a conveyor belt over a 550 mm reach using 402 N of thrust at 0.5 MPa.
Package Diverting
Actuates a diverter arm across a packaging line, with external guides supporting the long 550 mm stroke.
Replacing the Airtac SI32 Standard Air Cylinder SI32X550 with the SAI32X550
To replace the SI32X550, order the SAI32X550. Verify the ISO 15552 mounting interface, 32 mm bore, 550 mm stroke, G1/8 port (PT/G/NPT threads) and mounting accessory. Because this 550 mm stroke is long, use external guides to prevent rod bending and side-load wear. Sizing both ways: a 40 mm bore offers 628 N push at 0.5 MPa, while dropping pressure to 0.4 MPa yields 321 N. This plain cylinder lacks a magnet so it cannot accept CS1-B/DS1-B sensors. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X550
- ✓ 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 SI32X550 FAQ
Yes, the AirTAC SI32X550 is discontinued. The direct replacement is the SAI32X550. It is dimensionally interchangeable per ISO 15552, matching the 32 mm bore, 550 mm stroke, output force, G1/8 port and mounting accessories.
This double-acting cylinder has a G1/8 port. It provides 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, 724 N push at 0.9 MPa, and a theoretical max of 82 kgf at 1.0 MPa.
Request a Quote for the SAI32X550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X550 replacement — usually within 7-8 hours.