This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX45, 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 SI100BX45
The AirTAC Airtac SI100 Standard Cylinder SI100BX45 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 45mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX45, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX45
- 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 SI100BX45
The AirTAC SI100BX45 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 45 mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa through a G1/2 port. AirTAC replaced this EOL unit with the SAI100BX45, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU has a SUS304 stainless steel rod and no magnet, so it cannot accept a position switch.
A standard cylinder cannot hold a load without live air; the adjustable 36 mm cushions only decelerate the piston near stroke ends. For secure load holding, consider the SAIL air-released lock or BSAI clamp-lock variants introduced in the SAI family. If high temperatures are involved, a Viton H seal option extends the operating range up to 150 C.
Airtac SI100 Standard Cylinder SI100BX45 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX45 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX45 |
| Bore size | Ø100 mm |
| Stroke | 45 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 SAI100BX45 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 SAI100BX45 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 SI100BX45
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×45 | 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 SI100BX45 Is Used
Heavy-Duty Pressing
Applies 3927 N of push force at 0.5 MPa for seating bearings, stamping light-gauge materials, or assembling heavy components in automated machinery.
Corrosive Environment Actuation
Leverages the SUS304 stainless steel piston rod for moisture-resistant operation in washdown zones or humid production lines where carbon steel rods would degrade.
Replacing the Airtac SI100 Standard Cylinder SI100BX45 with the SAI100BX45
To replace the discontinued SI100BX45, order the SAI100BX45. Verify the ISO 15552 mounting interface, the 45 mm stroke, and the G1/2 port (available in PT, G, or NPT threads). This unit uses a SUS304 stainless steel rod (the B designation) for corrosion resistance instead of the standard carbon steel. Because this SKU lacks the S suffix, it has no magnet and cannot support legacy CS1-B or DS1-B sensors. If position detection is required, you must select an SAI model with the magnet option. Sizing context: the 100 mm bore provides 3927 N push at 0.5 MPa; if you need less force, the neighboring 80 mm bore offers 2513 N. For applications needing built-in flow control, the SAIF variant (bores 32-100) integrates a 4M valve. Remember that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX45
- ✓ 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 SI100BX45 FAQ
Yes, the SI100BX45 is discontinued. The direct replacement is the SAI100BX45. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 45 mm stroke, G1/2 port, output force, and mounting interface, so it drops directly into existing fixtures.
The 100 mm bore features a G1/2 air port and a 25 mm piston rod. 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. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX45
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX45 replacement — usually within 7-8 hours.