This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX155S, 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 SI100BX155S
The AirTAC Airtac SI100 Standard Cylinder SI100BX155S 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 SAI100BX155S, 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 → SAI100BX155S
- 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 SI100BX155S
The AirTAC SI100BX155S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 155mm stroke, delivering 3927N push force at 0.5 MPa via a G1/2 port. It features a SUS304 stainless piston rod and an integrated magnet for legacy CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI100BX155S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and port size.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. Note that a standard cylinder drifts without live air; for load holding, explore the SAIL or BSAI lock variants rather than relying on the end cushions.
Airtac SI100 Standard Cylinder SI100BX155S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX155S |
| 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 SAI100BX155S 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 SAI100BX155S 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 SI100BX155S
| 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 SI100BX155S Is Used
Heavy-Duty Pressing
Drives 3927N at 0.5MPa for assembling bearings and seating heavy mechanical components in automated machinery.
Pallet Diversion
Actuates heavy lane guiders and sorting gates on packaging lines, utilizing the 155mm stroke to redirect loaded pallets.
Replacing the Airtac SI100 Standard Cylinder SI100BX155S with the SAI100BX155S
To replace the discontinued SI100BX155S, order the SAI100BX155S. Verify your ISO 15552 mounting fixtures, the G1/2 air port, the M20x1.5 rod thread, and the -S magnet requirement for current AirTAC switches. If downsizing, a 80mm bore yields 2513N at 0.5MPa; if upsizing, a 125mm bore provides 6136N. Because this 155mm stroke is under 300mm, side-load rod-bending risks are minimal, but always guide heavy loads. The double-acting design cannot hold loads without air; add a pilot check valve or select the SAIL lock variant for fail-safe gripping. The -B rod option provides SUS304 stainless steel for corrosion resistance.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX155S
- ✓ 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 SI100BX155S FAQ
Yes, the AirTAC SI100BX155S is discontinued. The direct replacement is the SAI100BX155S. It shares the exact ISO 15552 mounting interface, 100mm bore, 155mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
This 100mm bore cylinder features a G1/2 air port and delivers 3927N push / 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX155S replacement — usually within 7-8 hours.