This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X135S, 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 SI32X135S
The AirTAC SI32 Standard Air Cylinder SI32X135S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 135mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X135S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke135 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X135S
- 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 SI32X135S
The AirTAC SI32X135S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 135mm stroke. Delivering 402N push force at 0.5MPa, it features a G1/8 port and M10x1.25 rod thread. AirTAC replaced this legacy unit with the SAI32X135S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for extended life and lower start-up pressure. The original SI-S variant includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches and adds SAIL, SAIF, and BSAI lock or valve variants the SI lacked.
Airtac SI32 Standard Air Cylinder SI32X135S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X135S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X135S |
| Bore size | Ø32 mm |
| Stroke | 135 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 SAI32X135S 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 SAI32X135S 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 SI32X135S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×135 | 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 SI32X135S Is Used
Small Part Ejection
Ideal for pushing lightweight machined components out of a fixture using its 402N push force and 135mm travel distance.
Gate Diverting
Actuates low-friction sorting flaps or guide gates in packaging lines, benefiting from the 30-800mm/s speed range.
Replacing the Airtac SI32 Standard Air Cylinder SI32X135S with the SAI32X135S
To replace the discontinued SI32X135S, order the SAI32X135S ensuring the ISO 15552 interface, 32mm bore, 135mm stroke, G1/8 port, and mounting accessory match your fixture. Retain the -S magnet requirement for position sensing. When sizing, neighboring bores offer different force classes: a 40mm bore yields 628N push at 0.5MPa, whereas dropping to a smaller bore reduces capacity. Note that a plain SAI does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For the 135mm stroke, verify guide alignment to prevent rod bending side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X135S
- ✓ 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 SI32X135S FAQ
Yes, the SI32X135S is discontinued. The direct replacement is the SAI32X135S. It shares the identical ISO 15552 mounting interface, 32mm bore, 135mm stroke, output force, and G1/8 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder has a G1/8 port and provides 402N push / 345N pull at 0.5MPa, 563N push at 0.7MPa, and a theoretical maximum force of 82kgf at 1.0MPa. It operates at 30-800mm/s with a 27mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X135S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X135S replacement — usually within 7-8 hours.