This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X450STC, 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 SI100X450STC
The AirTAC SI100 Standard Cylinder SI100X450STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X450STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X450STC
- 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 SI100X450STC
The AirTAC SI100X450STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 450mm stroke. It delivers a push force of 3927 N at 0.5 MPa using a G1/2 port. AirTAC replaced this legacy unit with the SAI100X450STC, a direct upgrade retaining the exact same ISO 15552 mounting interface, bore, stroke, output force, and TC trunnion mount.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. The -S magnet supports legacy CS1-B/DS1-B sensors, while a Viton H seal option raises operating temps to 150 C.
Airtac SI100 Standard Cylinder SI100X450STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X450STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X450STC |
| Bore size | Ø100 mm |
| Stroke | 450 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 SAI100X450STC 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 SAI100X450STC 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 SI100X450STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SI100X450STC Is Used
Heavy Material Transfer
Drives robust pallet stops and heavy-gauge workpiece diverters on high-throughput conveyor lines requiring substantial push force over a 450mm extension.
Pallet Positioning
Actuates large load lift gates and heavy-duty positioning arms in automated warehousing, utilizing the TC trunnion mount to handle pivotal loads effectively.
Industrial Pressing
Executes high-force clamping and pressing operations in machining fixtures, benefiting from the 100mm bore's 3927 N thrust at 0.5 MPa.
Replacing the Airtac SI100 Standard Cylinder SI100X450STC with the SAI100X450STC
To replace the SI100X450STC, order the SAI100X450STC. Verify your ISO 15552 TC trunnion mounting, G1/2 port, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). The 100mm bore yields 3927 N push at 0.5 MPa; if undersized, the 125mm bore offers 6136 N. For the 450mm stroke, use external guides to prevent rod bending and side loads. Note that a plain cylinder drifts without air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X450STC
- ✓ 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 SI100X450STC FAQ
Yes, the AirTAC SI100X450STC is discontinued. The direct replacement is the SAI100X450STC. It features the same ISO 15552 mounting interface, 100mm bore, 450mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
The 100mm bore features a G1/2 air port and a 25mm piston rod. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and 7068 N at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X450STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X450STC replacement — usually within 7-8 hours.