This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX145, 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 SI100AX145
The AirTAC Airtac SI100 Standard Cylinder SI100AX145 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX145, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX145
- 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 SI100AX145
The AirTAC SI100AX145 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 145mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX145, matching the exact interface, bore, stroke, force, and mounting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This specific SKU uses a SUS420J2 stainless steel rod (-A) for corrosion resistance but lacks a magnet (-S), meaning it cannot accept position sensors. Note that a plain cylinder drifts on air loss; the cushion only decelerates.
Airtac SI100 Standard Cylinder SI100AX145 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX145 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX145 |
| Bore size | Ø100 mm |
| Stroke | 145 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 SAI100AX145 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 SAI100AX145 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 SI100AX145
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×145 | 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 SI100AX145 Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring substantial thrust, utilizing the 3927 N push force at 0.5 MPa.
Pallet Diversion
Actuates heavy lane diverters or sorting gates on high-throughput packaging lines with a 145mm stroke.
Replacing the Airtac SI100 Standard Cylinder SI100AX145 with the SAI100AX145
To replace the SI100AX145, order the SAI100AX145. Verify the ISO 15552 mounting interface, the 145mm stroke, and the G1/2 port. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, switch to an SAI model with the S suffix. The -A rod specifies SUS420J2 stainless steel. Sizing up or down: a 125mm bore offers 6136 N push at 0.5 MPa, while an 80mm bore provides 2513 N. For holding loads without live air, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants. Since the stroke is under 300mm, side-load rod-bending risks are minimal, but standard guide considerations apply.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX145
- ✓ 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 SI100AX145 FAQ
Yes, the AirTAC SI100AX145 is discontinued. The direct replacement is the SAI100AX145. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 145mm stroke, output force, G1/2 port, and mounting interface.
This 100mm bore cylinder features a G1/2 air port and an M20x1.5 rod thread. Force 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; with a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX145
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX145 replacement — usually within 7-8 hours.