This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X140STC, 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 SI32X140STC
The AirTAC SI32 Standard Air Cylinder SI32X140STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 140mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X140STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke140 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X140STC
- 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 SI32X140STC
The AirTAC SI32X140STC is a discontinued double-acting ISO 15552 profile cylinder. Delivering 402 N push force at 0.5 MPa through a 32 mm bore and 140 mm stroke, it uses a G1/8 port. The direct replacement is the SAI32X140STC, which matches the exact ISO 15552 mounting interface, force, and TC trunnion accessory.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI variants the SI lacked. Your -S magnet works with CS1-B/DS1-B switches, while the SAI uses current AirTAC switches.
Airtac SI32 Standard Air Cylinder SI32X140STC Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X140STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X140STC |
| Bore size | Ø32 mm |
| Stroke | 140 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 SAI32X140STC 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 SAI32X140STC 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 SI32X140STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×140 | 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 SI32X140STC Is Used
Small Part Ejection
Uses the 402 N push force to reliably kick small machined components out of a fixture during automated assembly.
Package Diverting
Actuates a lightweight routing gate on a packaging line, benefiting from the 30-800 mm/s speed range.
Clamp Actuation
Provides low-force clamping for delicate electronics housings via the TC trunnion mount to allow pivot alignment.
Replacing the Airtac SI32 Standard Air Cylinder SI32X140STC with the SAI32X140STC
To replace this SI with the SAI32X140STC, verify the ISO 15552 TC trunnion mount, 140 mm stroke, G1/8 port, and -S magnet. Sizing both ways: a neighbouring 40 mm bore offers 628 N push at 0.5 MPa, while dropping to 0.5 MPa on this 32 mm bore still yields 402 N. Note that a plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 140 mm stroke, side-load risks are low, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X140STC
- ✓ 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 SI32X140STC FAQ
Yes, the SI32X140STC is discontinued. The direct replacement is the SAI32X140STC. It is dimensionally interchangeable per the ISO 15552 mounting interface, matching the 32 mm bore, 140 mm stroke, G1/8 port, and TC mount.
This 32 mm bore cylinder uses a G1/8 port. The force ratings are: 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 max of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X140STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X140STC replacement — usually within 7-8 hours.