This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X550N, 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 SI32X550N
The AirTAC SI32 Standard Air Cylinder SI32X550N 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 SAI32X550N, 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 → SAI32X550N
- 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 SI32X550N
The AirTAC SI32X550N 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 SAI32X550N, matching the interface, force, and mounting exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Note this SKU lacks a magnet (-S) so cannot accept a CS1-B/DS1-B sensor; the NBR seal supports -20 to +70 C (Viton H raises this to 150 C).
Airtac SI32 Standard Air Cylinder SI32X550N Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X550N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X550N |
| 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 SAI32X550N 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 SAI32X550N 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 SI32X550N
| 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 SI32X550N Is Used
Light Package Diverting
Pushes small cartons on a packaging line using the 402 N push force at 0.5 MPa, with the 550 mm stroke reaching across a standard conveyor belt.
Bin Actuation
Extends 550 mm to open or close low-friction discharge gates on bulk storage bins, safely moving loads under 241 N.
Component Ejection
Ejects lightweight machined parts from a fixture, utilizing the 30-800 mm/s speed range and 32 mm bore compact footprint.
Replacing the Airtac SI32 Standard Air Cylinder SI32X550N with the SAI32X550N
To replace the SI32X550N, order the SAI32X550N keeping the identical 32 mm bore, 550 mm stroke, G1/8 port, and ISO 15552 mounting. Because this 550 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load wear. If you need to hold position without live air, the cushion only decelerates; add an external pilot check valve or choose the SAIL lock or BSAI clamp-lock variant. For higher force, step up to a 40 mm bore (628 N push @0.5 MPa), or drop to a 25 mm bore if lower force is acceptable. The SAIF variant (bores 32-100) integrates a 4M valve if space is tight.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X550N
- ✓ 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 SI32X550N FAQ
Yes, the SI32X550N is discontinued. The direct replacement is the SAI32X550N. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 32 mm bore, 550 mm stroke, output force, G1/8 port, and mounting accessories.
The G1/8 port feeds a 32 mm bore yielding 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. The rod is 12 mm with an M10x1.25 thread, and the adjustable air cushion is 27 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X550N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X550N replacement — usually within 7-8 hours.