This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X25H, 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 SI100X25H
The AirTAC Airtac SI100 Standard Cylinder SI100X25H 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 SAI100X25H, 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 → SAI100X25H
- 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 SI100X25H
The AirTAC SI100X25H 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 SAI100X25H, matching the interface, force, and mounting. This SKU uses a Viton H seal for 0-150C high-temp environments, but lacks a magnet so it cannot accept position sensors.
The SAI upgrade features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants absent from the SI line. Note that a plain cylinder drifts without live air; use an external rod lock or SAIL variant to hold loads.
Airtac SI100 Standard Cylinder SI100X25H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X25H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X25H |
| 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 SAI100X25H 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 SAI100X25H 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 SI100X25H
| 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 SI100X25H Is Used
High-Temp Ejection
Viton H seals handle 150C environments, making this 3927N cylinder ideal for ejecting molded parts near heat zones.
Short-Stroke Clamping
The 25mm stroke provides rigid 100mm bore clamping force for heavy machining fixtures without excessive overhang.
Heavy Diverting
Generates 5497N at 0.7MPa to positively divert heavy pallets or product bundles on high-throughput lines.
Replacing the Airtac SI100 Standard Cylinder SI100X25H with the SAI100X25H
To replace the SI100X25H, order the SAI100X25H. It drops into existing fixtures per the ISO 15552 mounting interface, keeping the 100mm bore, 25mm stroke, M20x1.5 rod thread, G1/2 port, and 36mm cushions. Because this SKU lacks a magnet (-S), it cannot support CS1-B/DS1-B sensors; order an SAI with S if sensing is needed. When sizing both ways, the 100mm bore yields 3927N push at 0.5MPa (80mm gives 2513N; 125mm gives 6136N). For load holding, remember the cushion only decelerates; it does not brake. Use a pilot check valve, external rod lock, or the SAIL/BSAI lock variants to prevent drift on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X25H
- ✓ 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 SI100X25H FAQ
Yes, the SI100X25H is discontinued. The direct replacement is the SAI100X25H. It matches the ISO 15552 mounting interface, 100mm bore, 25mm stroke, force, and G1/2 port, so it fits existing fixtures perfectly.
It has a G1/2 port. Force ratings are: 3927N push and 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 SAI100X25H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X25H replacement — usually within 7-8 hours.