This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX250S, 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 SI32BX250S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 250mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX250S
- 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 SI32BX250S
The AirTAC SI32BX250S is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, 250mm stroke, SUS304 stainless steel rod, and a built-in magnet. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32BX250S.
The SAI drop-in maintains identical ISO 15552 mounting, stroke, and force. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure, and adds SAIL/BSAI lock variants. Expect a safe working load around 241N and a 20kg vertical lift capacity.
Airtac SI32 Standard Air Cylinder SI32BX250S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX250S |
| Bore size | Ø32 mm |
| Stroke | 250 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 SAI32BX250S 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 SAI32BX250S 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 SI32BX250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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 SI32BX250S Is Used
Stainless Rod Clamping
Ideal for small component positioning in washdown environments, utilizing the SUS304 piston rod for corrosion resistance and 402N push force at 0.5 MPa.
Light Part Ejection
Provides reliable ejection of lightweight fabricated parts over a 250mm travel, operating at speeds between 30-800 mm/s with adjustable end cushions.
Material Transfer Gates
Actuates diverter gates in packaging lines where a 241N safe working load and compact 32mm ISO 15552 profile barrel fit existing machinery.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX250S with the SAI32BX250S
To replace the SI32BX250S, order the SAI32BX250S, confirming the ISO 15552 interface, 32mm bore, 250mm stroke, G1/8 port, and -S magnet for CS1-B/DS1-B switches. The SUS304 rod suits corrosive settings. At 250mm stroke, use guide rails to prevent rod bending under side loads. If stepping up a bore size, note the 40mm bore yields 628N push at 0.5MPa. This plain cylinder will not hold a load without air; use a pilot check valve or the SAIL lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX250S
- ✓ 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 SI32BX250S FAQ
Yes, the SI32BX250S is discontinued. The exact drop-in replacement is the SAI32BX250S. It shares the same ISO 15552 mounting interface, 32mm bore, 250mm stroke, G1/8 port, and force, fitting existing fixtures perfectly.
The 32mm bore features a G1/8 port. Force outputs are: 402N push and 345N pull at 0.5 MPa, 563N push at 0.7 MPa, 724N push at 0.9 MPa, and a theoretical maximum of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX250S replacement — usually within 7-8 hours.