This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX850S, 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 SI100AX850S
The AirTAC Airtac SI100 Standard Cylinder SI100AX850S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 850mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX850S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX850S
- 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 SI100AX850S
The AirTAC SI100AX850S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel. It delivers 3927 N of push force at 0.5 MPa through its 100 mm bore and 850 mm stroke, operating at speeds of 30-800 mm/s with a G1/2 port. The direct replacement is the SAI100AX850S, which shares the same interface, force, and mounting dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. It also adds variants the SI lacked, like the SAIL lock and BSAI clamp-lock. This specific unit includes the -A SUS420J2 stainless rod and -S magnet for CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100AX850S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX850S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX850S |
| Bore size | Ø100 mm |
| Stroke | 850 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 SAI100AX850S 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 SAI100AX850S 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 SI100AX850S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×850 | 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 SI100AX850S Is Used
Large Part Ejection
Pushes heavy finished moldsings or castings out of hydraulic presses using 3927 N of thrust at 0.5 MPa.
Pallet Diversion
Extends 850 mm to actuate large diverter arms across wide material handling conveyor lines.
Replacing the Airtac SI100 Standard Cylinder SI100AX850S with the SAI100AX850S
To replace the SI100AX850S, order the SAI100AX850S. Verify the ISO 15552 mounting interface, 850 mm stroke, G1/2 port, and your specific -A SUS420J2 stainless rod and -S magnet requirement. The SAI uses current AirTAC switches, whereas the legacy SI used CS1-B/DS1-B sensors. Sizing both ways: this 100 mm bore yields 3927 N push at 0.5 MPa; dropping to an 80 mm bore gives 2513 N, while increasing to 125 mm provides 6136 N. Because the 850 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load without air; for load holding on pressure loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX850S
- ✓ 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 SI100AX850S FAQ
Yes, the SI100AX850S is discontinued. The direct replacement is the SAI100AX850S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100 mm bore, 850 mm stroke, 3927 N output force, G1/2 port, and mounting accessories.
This double-acting cylinder has a G1/2 port. The thrust ratings are 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and 7068 N push at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX850S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX850S replacement — usually within 7-8 hours.