This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX125, 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 SI100AX125
The AirTAC Airtac SI100 Standard Cylinder SI100AX125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX125
- 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 SI100AX125
The AirTAC SI100AX125 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 125mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX125, matching the bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
This specific SKU features a SUS420J2 stainless steel piston rod for corrosion resistance, but lacks a magnet so it cannot accept position sensors. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI100 Standard Cylinder SI100AX125 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX125 |
| Bore size | Ø100 mm |
| Stroke | 125 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 SAI100AX125 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 SAI100AX125 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 SI100AX125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SI100AX125 Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring 3927 N of push force at 0.5 MPa, utilizing the 125mm stroke for deep draw operations.
Automated Clamp Fixtures
Secures large fabricated steel frames during welding, using the full 7068 N thrust at 0.9 MPa to prevent workpiece shifting.
Replacing the Airtac SI100 Standard Cylinder SI100AX125 with the SAI100AX125
To replace the SI100AX125, order the SAI100AX125 and verify your ISO 15552 mounting interface, G1/2 port thread (PT/G/NPT) and accessory type. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B switches; if sensing is needed, select an SAI model with the magnet option. Sizing both ways: the 100mm bore yields 3927 N push at 0.5 MPa, while the neighbouring 80mm bore provides 2513 N. Note that a plain cylinder drifts without live air; for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX125
- ✓ 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 SI100AX125 FAQ
Yes, the AirTAC SI100AX125 is discontinued. The direct replacement is the SAI100AX125. It is dimensionally interchangeable per ISO 15552, offering the same 100mm bore, 125mm stroke, force, G1/2 port and mounting interface.
This 100mm bore cylinder features a G1/2 air port. The thrust ratings are: 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 of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX125 replacement — usually within 7-8 hours.