This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X90, 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 SI100X90
The AirTAC Airtac SI100 Standard Cylinder SI100X90 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 90mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X90, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X90
- 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 SI100X90
The AirTAC SI100X90 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 90 mm stroke, delivering 3927 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI100X90, a direct upgrade retaining the exact ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This plain SKU lacks a magnet and cannot accept a sensor.
The SAI family also introduces variants the SI line lacked, such as the SAIL air-released lock, SAIF built-in 4M valve, and BSAI clamp-lock. Note that a standard cylinder drifts on air loss; the cushion only decelerates near stroke end, so use a lock variant or pilot check valve for load holding.
Airtac SI100 Standard Cylinder SI100X90 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X90 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X90 |
| Bore size | Ø100 mm |
| Stroke | 90 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 SAI100X90 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 SAI100X90 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 SI100X90
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×90 | 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 SI100X90 Is Used
Heavy Press Operations
Ideal for driving large stamping or pressing dies requiring substantial linear thrust, utilizing the 3927 N push force at 0.5 MPa to form or seat heavy components.
Pallet Handling Diverters
Provides the robust actuation needed to push or divert loaded pallets along conveyors, handling the 200 kg vertical lift equivalent with reliable momentum.
Large Clamp Fixturing
Secures bulky workpieces within machining cells, where the 100 mm bore and G1/2 port deliver high clamping pressure without requiring maximum system air pressure.
Replacing the Airtac SI100 Standard Cylinder SI100X90 with the SAI100X90
To replace the discontinued SI100X90, order the SAI100X90 direct equivalent, ensuring the ISO 15552 mounting interface, 100 mm bore, 90 mm stroke, and G1/2 port match your existing fixture. Confirm your mounting accessory (LB, FA, CA, TC, etc.) and thread standard (PT, G, or NPT). Because this specific SKU lacks the -S magnet option, it cannot support legacy CS1-B/DS1-B sensors; if position feedback is required, select an SAI model with the magnet suffix. When sizing both ways, neighbouring bores (80 mm or 125 mm) offer different force classes, but the 100 mm bore yields 3927 N push at 0.5 MPa. For applications requiring load holding on air loss, remember the standard cushion only decelerates; you must specify an external rod lock, a pilot-operated check valve, or transition to the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X90
- ✓ 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 SI100X90 FAQ
Yes, the AirTAC SI100X90 is discontinued and end-of-life. The direct replacement is the SAI100X90. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100 mm bore, 90 mm stroke, output force, G1/2 port, and mounting accessories.
The 100 mm bore features a G1/2 air port and a 25 mm piston rod. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. 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 SAI100X90
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X90 replacement — usually within 7-8 hours.