This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX55, 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 SI32AX55
The AirTAC SI32 Standard Air Cylinder SI32AX55 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 SAI32AX55, 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 → SAI32AX55
- 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 SI32AX55
The AirTAC SI32AX55 is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 55 mm stroke. It delivers 402 N push force at 0.5 MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32AX55, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, port size and mounting accessories.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SI32AX55 variant uses an SUS420J2 stainless steel rod (A suffix) for corrosion resistance. Note this SKU lacks a magnet and cannot accept a CS1-B or DS1-B sensor.
Airtac SI32 Standard Air Cylinder SI32AX55 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX55 |
| 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 SAI32AX55 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 SAI32AX55 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 SI32AX55
| 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 SI32AX55 Is Used
Small Part Clamping
Ideal for securing compact machined components during light milling or drilling, utilizing the 402 N push force and SUS420J2 stainless rod for corrosion resistance in wet environments.
Package Diverting
Powers small diverter arms on packaging lines to route lightweight cartons, benefiting from the 30-800 mm/s speed range and ISO 15552 direct mounting.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX55 with the SAI32AX55
To replace the discontinued SI32AX55, order the SAI32AX55. Verify your ISO 15552 interface, 32 mm bore, 55 mm stroke, G1/8 port (PT/G/NPT thread) and mounting accessory. This unit has an SUS420J2 stainless rod but no magnet (-S), so it cannot host a position switch; add the S suffix on the SAI if you need CS1-B/DS1-B sensing. For sizing both ways: a 40 mm bore offers 628 N push at 0.5 MPa, while dropping pressure to 0.5 MPa on this 32 mm bore yields 402 N. The air cushion only decelerates the piston; it does not hold load on air loss. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX55
- ✓ 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 SI32AX55 FAQ
Yes, the SI32AX55 is discontinued. The direct replacement is the SAI32AX55. It shares the identical ISO 15552 mounting interface, 32 mm bore, 55 mm stroke, output force, G1/8 port and mounting accessories, fitting directly into existing fixtures.
The 32 mm bore features a G1/8 port and M10x1.25 rod thread. It delivers 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 adjustable air cushion is 27 mm at each end.
Request a Quote for the SAI32AX55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX55 replacement — usually within 7-8 hours.