This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX155, 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 SI100BX155
The AirTAC Airtac SI100 Standard Cylinder SI100BX155 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX155, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX155
- 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 SI100BX155
The AirTAC SI100BX155 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 155 mm stroke. It delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa, operating via a G1/2 port. As a legacy unit, it is replaced directly by the SAI100BX155, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
This specific SKU features a SUS304 stainless steel rod for corrosion resistance, but lacks a magnet so it cannot accept a position switch. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that plain cylinders drift without live air; for held loads explore the SAIL lock or BSAI clamp-lock variants the SI line lacked.
Airtac SI100 Standard Cylinder SI100BX155 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX155 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX155 |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAI100BX155 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 SAI100BX155 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 SI100BX155
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SI100BX155 Is Used
Heavy-Duty Pressing
Drives substantial clamping or pressing tasks using 3927 N of push force at 0.5 MPa, ideal for assembling dense mechanical components.
Corrosive Environment Actuation
Operates reliably in washdown or chemical exposure areas thanks to the SUS304 stainless piston rod, replacing standard carbon steel.
Replacing the Airtac SI100 Standard Cylinder SI100BX155 with the SAI100BX155
To replace the SI100BX155, order the SAI100BX155. Confirm the ISO 15552 mounting interface, the 100 mm bore, 155 mm stroke, and G1/2 port (available in PT, G, or NPT). This unit uses a SUS304 stainless rod; specify accordingly. Because this SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors—choose an SAI with S if sensing is needed. For sizing alternatives, a neighboring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore offers 6136 N. Remember, the air cushion only decelerates; it does not hold load. For drop prevention on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX155
- ✓ 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 SI100BX155 FAQ
Yes, the SI100BX155 is discontinued. The direct replacement is the SAI100BX155. It shares the identical ISO 15552 mounting interface, 100 mm bore, 155 mm stroke, force, and G1/2 port, fitting existing fixtures perfectly while adding an upgraded piston seal.
This double-acting cylinder uses a G1/2 port. It generates a push force of 3927 N and pull of 3681 N at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX155
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