This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX770S, 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 SI100BX770S
The AirTAC Airtac SI100 Standard Cylinder SI100BX770S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 770mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX770S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke770 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX770S
- 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 SI100BX770S
The AirTAC SI100BX770S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 770mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa through a G1/2 port. The direct replacement is the SAI100BX770S, which matches the interface, stroke, force, and mounting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -B model uses a SUS304 stainless piston rod for corrosion resistance, and the -S magnet works with legacy CS1-B/DS1-B sensors.
The SAI family also introduces lock and valve variants the SI lacked, like the SAIL air-released lock and BSAI clamp-lock. Note that a plain cylinder drifts on air loss; the cushion only decelerates near stroke end. For high heat, a Viton H seal option raises the temperature limit to 150C.
Airtac SI100 Standard Cylinder SI100BX770S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX770S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX770S |
| Bore size | Ø100 mm |
| Stroke | 770 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 SAI100BX770S 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 SAI100BX770S 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 SI100BX770S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×770 | 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 SI100BX770S Is Used
Heavy Goods Diversion
Actuates large diverters on high-capacity packaging lines, using the 3927N push force at 0.5MPa to reliably pivot heavy pallets onto secondary chutes.
Press & Forming Feed
Drives long-stroke material feed mechanisms into hydraulic presses, where the 770mm stroke and SUS304 rod withstand harsh industrial environments.
Pallet Lift Gates
Raises and lowers heavy loading dock gates, benefiting from the 200kg vertical lift capacity while relying on external guides to manage the 770mm extension.
Replacing the Airtac SI100 Standard Cylinder SI100BX770S with the SAI100BX770S
To replace the discontinued SI100BX770S, order the SAI100BX770S. It is dimensionally interchangeable per ISO 15552, keeping the 100mm bore, 770mm stroke, G1/2 port, and SUS304 rod. Confirm your mounting accessory (LB, FA, TC) and that the -S magnet matches your CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If sizing down, an 80mm bore yields 2513N push at 0.5MPa; sizing up to 125mm provides 6136N. A plain cylinder does not hold load without live air, so for vertical loads use the SAIL lock variant or an external pilot check valve. Because 770mm is a long stroke, prevent rod bending by guiding the load externally to avoid side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX770S
- ✓ 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 SI100BX770S FAQ
Yes, the SI100BX770S is discontinued. The direct replacement is the SAI100BX770S. It is dimensionally interchangeable per ISO 15552, offering the same 100mm bore, 770mm stroke, G1/2 port, and mounting interface, but adds an upgraded piston seal for longer life.
At 0.5MPa it provides 3927N push and 3681N pull. At 0.7MPa push is 5497N, and at 0.9MPa it is 7068N. The theoretical max force is 801kgf at 1.0MPa. Operating speed is 30-800mm/s, and it features a 25mm rod with M20x1.5 thread and 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX770S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX770S replacement — usually within 7-8 hours.