This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the drop-in replacement SAI32BX85S, 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 SI32BX85S
The AirTAC Airtac SI32 Standard Air Cylinder SI32BX85S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 85mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAI32BX85S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke85 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32BX85S
- 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 SI32BX85S
The AirTAC SI32BX85S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, 32mm bore, 85mm stroke, and a SUS304 stainless piston rod. Delivering 402N push at 0.5MPa via a G1/8 port, its exact drop-in successor is the SAI32BX85S. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life, while keeping the same mounting interface, bore, force, and cushioning.
For sizing, a safe working load is roughly 241N (60% of the 402N push force), equating to a 20kg vertical lift with a 2:1 margin. This -S model has a piston magnet for CS1-B/DS1-B switches. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or the SAIL lock variant for load holding.
Airtac SI32 Standard Air Cylinder SI32BX85S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32BX85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32BX85S |
| Bore size | Ø32 mm |
| Stroke | 85 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 SAI32BX85S 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 SAI32BX85S 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 SI32BX85S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×85 | 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 SI32BX85S Is Used
Stainless Rod Clamping
Ideal for small part clamping in machining cells where the SUS304 rod resists corrosion and the 402N force securely holds light workpieces.
Compact Package Sorting
The 85mm stroke and 32mm bore provide fast 30-800 mm/s actuation for diverting small parcels in distribution hubs with limited mounting space.
Lab Test Positioning
Smooth adjustable air cushions decelerate the 12mm rod at stroke ends, ensuring precise sensor placement for repetitive laboratory testing rigs.
Replacing the Airtac SI32 Standard Air Cylinder SI32BX85S with the SAI32BX85S
To replace the SI32BX85S, order the SAI32BX85S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 85mm stroke, and the G1/8 port. The -B rod is SUS304 stainless steel and the -S denotes a magnet for legacy CS1-B/DS1-B sensors. If you need more force, the adjacent 40mm bore yields 628N push at 0.5MPa. For holding loads without live air, the cushion will not lock the piston; select the SAIL air-released lock or BSAI clamp-lock variant, or fit an external pilot check valve. The SAIF variant adds a built-in 4M valve for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32BX85S
- ✓ 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 SI32BX85S FAQ
Yes, the AirTAC SI32BX85S is discontinued. The exact drop-in replacement is the SAI32BX85S. It is dimensionally interchangeable per ISO 15552, retaining the same 32mm bore, 85mm stroke, G1/8 port, and mounting interface, but features an upgraded two Y-shaped one-way piston seal for lower start-up pressure.
The 32mm bore uses a G1/8 port. At 0.5 MPa it provides 402N push and 345N pull force. At 0.7 MPa the push is 563N, and at 0.9 MPa it is 724N. The theoretical maximum force is 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32BX85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32BX85S replacement — usually within 7-8 hours.