This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX90STC, 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 SI100 Standard Cylinder SI100BX90STC
The AirTAC Airtac SI100 Standard Cylinder SI100BX90STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 90mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX90STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX90STC
- 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 SI100 Standard Cylinder SI100BX90STC
The AirTAC SI100BX90STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 90mm stroke, SUS304 stainless rod, and TC trunnion mount. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100BX90STC, matching the bore, stroke, output, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet works with legacy CS1-B/DS1-B sensors, while SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100BX90STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX90STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX90STC |
| Bore size | Ø100 mm |
| Stroke | 90 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100BX90STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100BX90STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100BX90STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×90 | 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 SI100 Standard Cylinder SI100BX90STC Is Used
Heavy Press Clamping
Uses the 3927 N push force at 0.5 MPa to secure heavy steel assemblies in machining fixtures, relying on the SUS304 rod for corrosion resistance in coolant environments.
Bulk Package Diverting
Actuates heavy diverting arms on high-throughput lines, using the 90mm stroke and adjustable 36mm air cushions to decelerate loads smoothly at end positions.
Replacing the Airtac SI100 Standard Cylinder SI100BX90STC with the SAI100BX90STC
To replace the SI100BX90STC, order the SAI100BX90STC. Confirm the ISO 15552 TC trunnion mounting, 100mm bore, 90mm stroke, G1/2 port (PT/G/NPT thread), SUS304 rod, and -S magnet. Sizing both ways: a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore yields 6136 N. The plain cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The SAIF variant (bores 32-100) integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX90STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100BX90STC FAQ
Yes, the SI100BX90STC is discontinued. The direct replacement is the SAI100BX90STC. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 90mm stroke, G1/2 port, TC mount, and output force for existing fixtures.
The 100mm bore uses a G1/2 port. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX90STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX90STC replacement — usually within 7-8 hours.