This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X25SLB, 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 SI100X25SLB
The AirTAC SI100 Standard Cylinder SI100X25SLB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X25SLB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X25SLB
- 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 SI100X25SLB
The AirTAC SI100X25SLB is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 25mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI100X25SLB, matching the original bore, stroke, force, and LB foot mounting interface for seamless fixture integration.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S magnet supports CS1-B/DS1-B sensors, and Viton H seals raise operating temps to 150C.
Airtac SI100 Standard Cylinder SI100X25SLB Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X25SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X25SLB |
| Bore size | Ø100 mm |
| Stroke | 25 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 SAI100X25SLB 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 SAI100X25SLB 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 SI100X25SLB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SI100X25SLB Is Used
Heavy-Duty Clamping
Secures large metal castings during CNC machining using the 3927N push force, with the LB foot mount providing a rigid base against high cutting forces.
Pallet Stopping
Acts as a robust end-stop for heavy loaded pallets on conveyor lines, absorbing impact with its 36mm adjustable air cushion and 25mm stroke.
Replacing the Airtac SI100 Standard Cylinder SI100X25SLB with the SAI100X25SLB
To replace the SI100X25SLB, order the SAI100X25SLB. Verify the ISO 15552 mounting interface, 100mm bore, 25mm stroke, G1/2 port, LB foot mount, and -S magnet. If sizing up or down, note the 80mm bore yields 2513N push at 0.5MPa, while the 125mm bore yields 6136N. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 25mm stroke is short, so side-load risks are minimal, but ensure the M20x1.5 rod thread aligns precisely to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X25SLB
- ✓ 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 SI100X25SLB FAQ
Yes, the SI100X25SLB is discontinued. The direct replacement is the AirTAC SAI100X25SLB. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 25mm stroke, G1/2 port, and LB mounting interface.
This double-acting cylinder features a G1/2 port. At 0.5MPa it provides 3927N push and 3681N pull force. At 0.7MPa push is 5497N, and at 0.9MPa it is 7068N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X25SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X25SLB replacement — usually within 7-8 hours.