This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X45, 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 SI100X45
The AirTAC Airtac SI100 Standard Cylinder SI100X45 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 SAI100X45, 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 → SAI100X45
- 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 SI100X45
The AirTAC SI100X45 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 45 mm stroke. It delivers a push force of 3927 N at 0.5 MPa and uses a G1/2 port. AirTAC replaced this legacy unit with the SAI100X45, a direct replacement sharing the exact same ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family introduces SAIL and BSAI lock variants absent in the SI line. Note this specific SKU lacks a magnet and cannot accept a sensor.
Airtac SI100 Standard Cylinder SI100X45 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X45 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X45 |
| 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 SAI100X45 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 SAI100X45 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 SI100X45
| 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 SI100X45 Is Used
Heavy-Duty Pressing
Applies the 3927 N push force at 0.5 MPa to seat bearings or assemble heavy mechanical components in automated manufacturing lines.
Pallet Load Shifting
Utilizes the 45 mm stroke to push 200 kg palletized goods smoothly onto adjacent conveyors using the computed vertical lift margin.
Clamp Actuation
Drives robust machining clamps on large fixtures, taking advantage of the 100 mm bore power and the adjustable 36 mm air cushions.
Replacing the Airtac SI100 Standard Cylinder SI100X45 with the SAI100X45
To replace the discontinued SI100X45, order the SAI100X45. Verify your existing fixture matches the ISO 15552 mounting interface dimensions, the G1/2 air port, and the M20x1.5 rod thread. Because this non-magnet SKU cannot accept a CS1-B or DS1-B sensor, you must select an external limit switch if position detection is required. When sizing, consider the neighboring 80 mm bore for tighter spaces or the 125 mm bore if you need more force than the 3927 N at 0.5 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so for suspended loads use an external pilot check valve or explore the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X45
- ✓ 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 SI100X45 FAQ
Yes, the AirTAC SI100X45 is discontinued. The direct replacement is the SAI100X45. It shares the identical ISO 15552 mounting interface, 100 mm bore, 45 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 100 mm bore uses a G1/2 port. At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X45
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X45 replacement — usually within 7-8 hours.