This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX65S, 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 SI100BX65S
The AirTAC Airtac SI100 Standard Cylinder SI100BX65S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 65mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX65S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX65S
- 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 SI100BX65S
The AirTAC SI100BX65S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 65mm stroke. Featuring a SUS304 stainless piston rod (-B) and a piston magnet (-S), it delivers 3927N push and 3681N pull at 0.5MPa through a G1/2 port. The direct replacement is the SAI100BX65S, matching the exact interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI100 Standard Cylinder SI100BX65S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX65S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX65S |
| Bore size | Ø100 mm |
| Stroke | 65 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 SAI100BX65S 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 SAI100BX65S 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 SI100BX65S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×65 | 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 SI100BX65S Is Used
Stainless Rod Pressing
Utilizes the 3927N push force and SUS304 rod for high-force pressing tasks in washdown or mildly corrosive manufacturing environments.
Heavy Transfer Diversion
Provides robust actuation for diverting heavy product loads on packaging lines, taking advantage of the 65mm stroke and G1/2 port capacity.
Pallet Stopper Gate
Acts as a high-strength pneumatic stop gate for pallet handling, safely halting loads up to the 200kg vertical lift threshold.
Replacing the Airtac SI100 Standard Cylinder SI100BX65S with the SAI100BX65S
To replace the SI100BX65S, order the SAI100BX65S to retain the exact ISO 15552 mounting interface, 100mm bore, 65mm stroke, G1/2 port, and SUS304 rod. Confirm your thread standard (PT/G/NPT) and mounting accessory (LB, FA, TC, etc.). The -S magnet allows CS1-B/DS1-B sensors. For sizing down, an 80mm bore yields 2513N push at 0.5MPa; sizing up, a 125mm bore provides 6136N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX65S
- ✓ 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 SI100BX65S FAQ
Yes, the SI100BX65S is discontinued. The direct replacement is the SAI100BX65S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 65mm stroke, G1/2 port, and mounting interface.
The 100mm bore provides 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Operating speed is 30-800mm/s, with a 36mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX65S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX65S replacement — usually within 7-8 hours.