This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X540LB, 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 SI32X540LB
The AirTAC SI32 Standard Air Cylinder SI32X540LB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 540mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X540LB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke540 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X540LB
- 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 SI32X540LB
The AirTAC SI32X540LB is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 540 mm stroke. Delivering 402 N push force at 0.5 MPa, it features a G1/8 port, M10x1.25 rod thread, and an LB foot mount. The direct replacement is the SAI32X540LB, matching the exact interface, force, and porting.
The SAI upgrade utilizes a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this specific SI SKU lacks the -S magnet, it cannot accept position sensors. The SAI family also adds SAIL and BSAI lock variants absent in the legacy line.
Airtac SI32 Standard Air Cylinder SI32X540LB Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X540LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X540LB |
| Bore size | Ø32 mm |
| Stroke | 540 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 SAI32X540LB 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 SAI32X540LB 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 SI32X540LB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×540 | 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 SI32X540LB Is Used
Light-Part Ejection
Pushes small molded parts off a conveyor belt over a 540 mm span using 402 N of thrust at 0.5 MPa.
Carton Diverting
Actuates a diverting arm in packaging lines where a 20 kg vertical lift capacity is sufficient.
Guided Linear Press
Performs light-duty pressing operations, requiring external guides to manage side loads on the 540 mm stroke.
Replacing the Airtac SI32 Standard Air Cylinder SI32X540LB with the SAI32X540LB
To replace the SI32X540LB, order the SAI32X540LB. Verify the ISO 15552 LB foot mount, 32 mm bore, 540 mm stroke, and G1/8 port (PT/G/NPT thread options). This SKU has no magnet, so it cannot support CS1-B/DS1-B sensors; add the -S suffix if sensing is needed. At 0.5 MPa it yields 402 N push (345 N pull); a neighbouring 40 mm bore provides 628 N push if more force is required. For this 540 mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load. For dead-load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X540LB
- ✓ 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 SI32X540LB FAQ
Yes, the AirTAC SI32X540LB is discontinued. The direct replacement is the SAI32X540LB. It is dimensionally interchangeable per ISO 15552, matching the 32 mm bore, 540 mm stroke, LB foot mount, and G1/8 port, so it fits existing fixtures directly.
This double-acting 32 mm bore cylinder has a G1/8 air 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 maximum theoretical force of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X540LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X540LB replacement — usually within 7-8 hours.