This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X75STC, 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 SI100X75STC
The AirTAC SI100 Standard Cylinder SI100X75STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X75STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X75STC
- 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 SI100X75STC
The AirTAC SI100X75STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 75mm stroke. Delivering 3927 N push force at 0.5 MPa, it is replaced directly by the SAI100X75STC. The SAI direct matches the exact G1/2 port, TC trunnion mount, and ISO 15552 interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S magnet works with CS1-B/DS1-B switches, while the SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X75STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X75STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X75STC |
| Bore size | Ø100 mm |
| Stroke | 75 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 SAI100X75STC 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 SAI100X75STC 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 SI100X75STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SI100X75STC Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring substantial thrust, utilizing the 3927 N push force at 0.5 MPa to seat components firmly.
Logistics Diverters
Actuates heavy transfer arms on high-speed sorting lines, moving bulky goods with a 75mm stroke and 30-800 mm/s speed range.
Replacing the Airtac SI100 Standard Cylinder SI100X75STC with the SAI100X75STC
To replace the SI100X75STC, order the SAI100X75STC. Verify the ISO 15552 TC trunnion interface, 75mm stroke, G1/2 port, and -S magnet. The SAI family adds SAIL (air-released lock), SAIF (built-in 4M valve for bores 32-100), and BSAI (clamp-lock) variants. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or SAIL/BSAI variant. Sizing both ways: a 100mm bore yields 3927 N push at 0.5 MPa, while an 80mm bore yields 2513 N. Speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X75STC
- ✓ 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 SI100X75STC FAQ
Yes, the AirTAC SI100X75STC is discontinued. The direct replacement is the SAI100X75STC. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 75mm stroke, G1/2 port, and TC trunnion mounting interface.
The 100mm bore features a G1/2 air port. Force ratings are: 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X75STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X75STC replacement — usually within 7-8 hours.