This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X825S, 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 SI100X825S
The AirTAC Airtac SI100 Standard Cylinder SI100X825S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 825mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X825S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke825 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X825S
- 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 SI100X825S
The AirTAC SI100X825S is a discontinued double-acting ISO 15552 profile cylinder with an 825 mm stroke and a built-in piston magnet. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100X825S, matching the bore, stroke, force, port 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 SAI family also adds SAIL, SAIF and BSAI variants the SI lacked. The -S suffix means it accepts CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X825S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X825S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X825S |
| Bore size | Ø100 mm |
| Stroke | 825 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 SAI100X825S 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 SAI100X825S 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 SI100X825S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×825 | 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 SI100X825S Is Used
Long-Stroke Diversion
Pushes heavy pallets across wide conveyor lanes using the 825 mm stroke and 3927 N force at 0.5 MPa.
Vertical Material Lift
Raises 200 kg loads in automated storage systems, requiring external guides to manage the 825 mm extension.
Large Press Ejection
Ejects formed parts from heavy machinery where the 7068 N output at 0.9 MPa ensures reliable removal.
Replacing the Airtac SI100 Standard Cylinder SI100X825S with the SAI100X825S
To replace this SI100X825S, order the SAI100X825S. Verify the ISO 15552 mounting interface, 825 mm stroke, G1/2 port, and your mounting accessory. The -S magnet enables CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). Sizing both ways: a 100 mm bore yields 3927 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Because stroke is 825 mm, use an external guide to prevent rod bending and side loads. A plain cylinder drifts without air; for load holding use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X825S
- ✓ 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 SI100X825S FAQ
Yes, the SI100X825S is discontinued. The direct replacement is the SAI100X825S. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 825 mm stroke, output force, G1/2 port and mounting fixtures.
This double-acting cylinder has a G1/2 port. It delivers 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 max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X825S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X825S replacement — usually within 7-8 hours.