This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX20, 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 SI100BX20
The AirTAC Airtac SI100 Standard Cylinder SI100BX20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 20mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX20
- 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 SI100BX20
The AirTAC SI100BX20 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 20mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. The direct replacement is the SAI100BX20, matching the interface, force, and mounting exactly.
This B-rod variant uses a SUS304 stainless piston rod for corrosion resistance. The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. Note this non-magnet SKU cannot accept sensors.
Airtac SI100 Standard Cylinder SI100BX20 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX20 |
| Bore size | Ø100 mm |
| Stroke | 20 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 SAI100BX20 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 SAI100BX20 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 SI100BX20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×20 | 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 SI100BX20 Is Used
High-Force Clamping
Secures heavy steel workpieces during machining operations using the full 3927N push force at 0.5 MPa.
Heavy Diverting
Short 20mm stroke pushes robust product lanes or heavy pallets on packaging conveyors with rapid actuation.
Pallet Stopping
Halts loaded pallets at transfer stations, relying on the SUS304 stainless rod for harsh or washdown environments.
Replacing the Airtac SI100 Standard Cylinder SI100BX20 with the SAI100BX20
To replace this SI cylinder, order the SAI100BX20. Verify the ISO 15552 mounting interface, 100mm bore, 20mm stroke, G1/2 port, and SUS304 rod. If you need position sensing, select an SAI model with the magnet option, as this non-S SKU cannot take a switch. For sizing, the 80mm bore yields 2513N push at 0.5MPa, while the 125mm bore offers 6136N. This cylinder will not hold a load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX20
- ✓ 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 SI100BX20 FAQ
Yes, the SI100BX20 is discontinued. The direct replacement is the SAI100BX20, which shares the same ISO 15552 mounting interface, 100mm bore, 20mm stroke, G1/2 port, and output force.
It features a G1/2 port and delivers 3927N push / 3681N pull at 0.5 MPa, 5497N push at 0.7 MPa, 7068N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX20 replacement — usually within 7-8 hours.