This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX250SH, 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 SI100BX250SH
The AirTAC Airtac SI100 Standard Cylinder SI100BX250SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX250SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX250SH
- 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 SI100BX250SH
The AirTAC SI100BX250SH is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless piston rod and Viton H high-temperature seals (0-150 C). With a 100 mm bore, it delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100BX250SH, a direct upgrade retaining the exact ISO 15552 mounting interface, 250 mm stroke, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches and adds SAIL, SAIF, and BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX250SH Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX250SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX250SH |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAI100BX250SH 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 SAI100BX250SH 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 SI100BX250SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SI100BX250SH Is Used
High-Force Clamping
Secures heavy steel weldments during machining, utilizing the 3927 N push force at 0.5 MPa with the durable SUS304 rod.
Pallet Diverting
Actuates heavy-duty diverters on packaging lines, where the G1/2 port and adjustable cushion ensure smooth 250 mm strokes.
Hot Environment Ejection
Ejects molded parts from heated zones, relying on the Viton H seals rated for 0-150 C and robust 100 mm bore thrust.
Replacing the Airtac SI100 Standard Cylinder SI100BX250SH with the SAI100BX250SH
To replace the SI100BX250SH, order the SAI100BX250SH. Confirm the ISO 15552 mounting interface, 250 mm stroke, G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). The -B rod is SUS304 stainless steel and the -H seal is Viton for 0-150 C environments; ensure the SAI is specified with these exact options. Because this is a 100 mm bore delivering 5497 N at 0.7 MPa, you could downsize to an 80 mm bore if your actual load is lighter, or upsize if more force is needed. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for suspended loads. At 250 mm stroke, guide rails are recommended to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX250SH
- ✓ 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 SI100BX250SH FAQ
Yes, the SI100BX250SH is discontinued. The direct replacement is the SAI100BX250SH. It features the same ISO 15552 mounting interface, 100 mm bore, 250 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 100 mm bore uses 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX250SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX250SH replacement — usually within 7-8 hours.