This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X55S, 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 SI32X55S
The AirTAC SI32 Standard Air Cylinder SI32X55S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 55mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X55S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke55 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X55S
- 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 SI32X55S
The AirTAC SI32X55S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 55mm stroke, delivering 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32X55S, a direct replacement retaining the exact interface, bore, stroke, force and mounting accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the SI line, while this -S SKU supports legacy CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32X55S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X55S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X55S |
| Bore size | Ø32 mm |
| Stroke | 55 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 SAI32X55S 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 SAI32X55S 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 SI32X55S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×55 | 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 SI32X55S Is Used
Small Part Ejection
Ideal for pushing lightweight machined components out of a fixture using its 402N push force at 0.5 MPa.
Package Diverting
Actuates a short-stroke routing gate on a packaging line, benefiting from the 30-800 mm/s speed range.
Clamp Actuation
Provides reliable clamping pressure for holding thin workpieces in a light assembly jig.
Replacing the Airtac SI32 Standard Air Cylinder SI32X55S with the SAI32X55S
To replace the SI32X55S, order the SAI32X55S to guarantee the ISO 15552 mounting interface, 32mm bore, 55mm stroke, G1/8 port and magnet are identical. Confirm your thread standard (PT, G or NPT) and mounting accessory (LB, FA, TC, etc.). If you need more force, the neighbouring 40mm bore yields 628N push at 0.5MPa. Note that a standard cylinder drifts without live air; the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X55S
- ✓ 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 SI32X55S FAQ
Yes, the SI32X55S is discontinued. The direct replacement is the AirTAC SAI32X55S. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 55mm stroke, G1/8 port and mounting interface, so it fits existing fixtures perfectly.
This double-acting 32mm bore cylinder features a G1/8 air port. It delivers 402N push and 345N pull at 0.5 MPa, 563N push at 0.7 MPa, 724N push at 0.9 MPa, and a theoretical maximum force of 82 kgf at 1.0 MPa.
Request a Quote for the SAI32X55S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X55S replacement — usually within 7-8 hours.