This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX120, 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 SI100BX120
The AirTAC Airtac SI100 Standard Cylinder SI100BX120 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX120, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX120
- 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 SI100BX120
The AirTAC SI100BX120 is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 120mm stroke, and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX120. This direct successor matches the G1/2 port, M20x1.5 thread, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. Because this specific SKU lacks a magnet, it cannot accept a position switch. For safe sizing, expect a 2356 N working load (60% of 0.5 MPa push) and a 200 kg vertical lift capacity.
Airtac SI100 Standard Cylinder SI100BX120 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX120 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX120 |
| Bore size | Ø100 mm |
| Stroke | 120 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 SAI100BX120 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 SAI100BX120 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 SI100BX120
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SI100BX120 Is Used
Stainless Rod Clamping
Ideal for securing heavy workpieces in machining centers, utilizing the SUS304 rod for corrosion resistance in wet coolant environments.
Heavy Package Diversion
Provides robust actuation for diverting large, heavy pallets or packages on automated material handling lines.
Pallet Lift Stops
Acts as a high-force stopper mechanism in distribution hubs, reliably halting loaded pallets at 0.5 MPa operating pressure.
Replacing the Airtac SI100 Standard Cylinder SI100BX120 with the SAI100BX120
To replace the SI100BX120, order the SAI100BX120, confirming the ISO 15552 interface, 100mm bore, 120mm stroke, G1/2 port, and SUS304 rod. If you need position sensing, select an SAI variant with the magnet suffix. For sizing, the 80mm bore yields 2513 N push at 0.5 MPa, while the 125mm bore yields 6136 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX120
- ✓ 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 SI100BX120 FAQ
Yes, the SI100BX120 is discontinued. The direct replacement is the SAI100BX120, which shares the same ISO 15552 mounting interface, 100mm bore, 120mm stroke, force, and G1/2 port.
The G1/2 port bore delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and an 801 kgf maximum at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX120
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX120 replacement — usually within 7-8 hours.