This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX425, 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 SI32BX425
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX425 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 425mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX425, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke425 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX425
- 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 SI32BX425
The AirTAC SI32BX425 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 425mm stroke. Featuring a SUS304 stainless steel rod for corrosion resistance, it delivers 402N push force at 0.5MPa via a G1/8 port. The exact drop-in replacement is the SAI32BX425, matching the interface, force, and stroke.
The SAI upgrade utilizes two Y-shaped one-way piston seals for low start-up pressure. Without a -S magnet, this SKU cannot accept a sensor. For sizing, a safe working load is ~241N (60% of 402N), lifting ~20kg vertically. Note that a plain cylinder drifts without air; use a pilot check valve or SAIL lock variant to hold loads.
Airtac SI32 Standard Air Cylinder SI32BX425 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX425 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX425 |
| Bore size | Ø32 mm |
| Stroke | 425 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 SAI32BX425 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 SAI32BX425 produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32BX425
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×425 | 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 SI32BX425 Is Used
Lab Automation
Ideal for shifting light sample trays where the SUS304 rod resists moisture and the 402N force is ample.
Package Diverting
Handles 425mm routing strokes on packaging lines, using adjustable cushions to stop light loads smoothly.
Washdown Ejection
Ejects parts from damp environments; the stainless rod prevents corrosion while lifting up to 20kg vertically.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX425 with the SAI32BX425
To replace this SI32BX425, order the SAI32BX425, confirming the ISO 15552 mounting interface, 32mm bore, 425mm stroke, G1/8 port, and SUS304 rod. Sizing both ways: a 40mm bore offers 628N push at 0.5MPa, while a 32mm bore provides 402N. Because this is a 425mm stroke, external guides are recommended to prevent rod bending from side loads. As a non-magnetized SKU, it cannot take CS1-B/DS1-B switches. The cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX425
- ✓ 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 SI32BX425 FAQ
Yes, the SI32BX425 is discontinued. The exact drop-in replacement is the SAI32BX425. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 425mm stroke, force, G1/8 port, and mounting fixtures.
This double-acting cylinder uses a G1/8 port. It delivers 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX425
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX425 replacement — usually within 7-8 hours.