This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX950, 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 SI100BX950
The AirTAC Airtac SI100 Standard Cylinder SI100BX950 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 950mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX950, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX950
- 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 SI100BX950
The AirTAC SI100BX950 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 950mm stroke. It features a SUS304 stainless piston rod and delivers 3927 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI100BX950, a direct replacement retaining the exact ISO 15552 mounting interface, G1/2 port, and 801 kgf maximum force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this non-magnet SKU cannot accept a sensor switch.
Airtac SI100 Standard Cylinder SI100BX950 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX950 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX950 |
| Bore size | Ø100 mm |
| Stroke | 950 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 SAI100BX950 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 SAI100BX950 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 SI100BX950
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×950 | 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 SI100BX950 Is Used
Long-Stroke Diversion
Pushes heavy pallets across 950mm transfer lines using the 3927 N force, guided externally to prevent rod bending.
Vertical Material Lift
Raises 200 kg loads in automated storage systems, requiring a pilot check valve to hold the load safely when air drops.
Corrosive Fluid Handling
Actuates dampers in washdown zones using the SUS304 stainless rod, benefiting from the Viton H high-temperature seal option.
Replacing the Airtac SI100 Standard Cylinder SI100BX950 with the SAI100BX950
To replace the SI100BX950, order the SAI100BX950, confirming the ISO 15552 interface, 100mm bore, 950mm stroke, G1/2 port, and SUS304 rod. If downsizing, an 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125mm bore provides 6136 N. Because the 950mm stroke invites rod bending, use external guides to prevent side loads. This plain cylinder lacks a magnet and cannot take CS1-B/DS1-B sensors. It will not hold a load on air loss—the 36mm cushions only decelerate. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX950
- ✓ 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 SI100BX950 FAQ
Yes, the SI100BX950 is discontinued. The direct replacement is the SAI100BX950, which matches the ISO 15552 mounting interface, 100mm bore, 950mm stroke, force, and G1/2 port.
It features a G1/2 port. Force outputs 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 SAI100BX950
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX950 replacement — usually within 7-8 hours.