This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX270, 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 SI32BX270
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 270mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke270 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX270
- 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 SI32BX270
The AirTAC SI32BX270 is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 270 mm stroke. It delivers 402 N push force at 0.5 MPa through a G1/8 port. The direct drop-in replacement is the SAI32BX270, matching the exact ISO 15552 mounting interface, stroke, and force.
This SKU features a SUS304 stainless steel rod for corrosion resistance but lacks a magnet, meaning it cannot accept position sensors. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure. For sizing, the safe working load is roughly 241 N, allowing a 20 kg vertical lift with a 2:1 margin.
Airtac SI32 Standard Air Cylinder SI32BX270 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX270 |
| Bore size | Ø32 mm |
| Stroke | 270 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 SAI32BX270 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 SAI32BX270 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 SI32BX270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×270 | 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 SI32BX270 Is Used
Small Part Ejection
Uses the 402 N push force at 0.5 MPa to reliably push lightweight machined components out of a fixture on an assembly line.
Corrosive Sortation
The SUS304 stainless rod handles damp or washdown environments while executing 270 mm sorting strokes for packaged goods.
Gripping Actuation
Provides the linear motion to open and close small pneumatic grippers in automated material handling tasks.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX270 with the SAI32BX270
To replace the SI32BX270, order the SAI32BX270. Confirm the ISO 15552 mounting interface, the 32 mm bore, 270 mm stroke, G1/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this is a no-S SKU, it cannot take a magnetic switch; if sensing is needed, select an SAI32B-S model and use current AirTAC switches. Neighbouring bores are 40 mm (628 N push @0.5 MPa) or 25 mm if downsizing. A plain cylinder does not hold load without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 270 mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX270
- ✓ 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 SI32BX270 FAQ
Yes, the AirTAC SI32BX270 is discontinued. The exact drop-in replacement is the SAI32BX270. It is dimensionally interchangeable per ISO 15552, keeping the same 32 mm bore, 270 mm stroke, force, G1/8 port, and mounting interface.
This double-acting cylinder has a G1/8 port. The thrust is 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 maximum force of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX270 replacement — usually within 7-8 hours.