This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX185, 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 SI100AX185
The AirTAC Airtac SI100 Standard Cylinder SI100AX185 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 185mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX185, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX185
- 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 SI100AX185
The AirTAC SI100AX185 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 185mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100AX185, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, force, and port size.
The SAI successor 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 (the -A option) and lacks a magnet, so it cannot accept a CS1-B or DS1-B sensor. For load holding, note that the air cushion only decelerates; you need an external rod lock or the SAIL/BSAI lock variants.
Airtac SI100 Standard Cylinder SI100AX185 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX185 |
| Bore size | Ø100 mm |
| Stroke | 185 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 SAI100AX185 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 SAI100AX185 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 SI100AX185
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×185 | 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 SI100AX185 Is Used
Heavy-Duty Pressing
Ideal for applying 3927 N of thrust at 0.5 MPa for seating bearings or light assembly pressing tasks.
Stainless Rod Tooling
The SUS420J2 stainless piston rod excels in humid manufacturing environments where carbon steel would corrode.
Replacing the Airtac SI100 Standard Cylinder SI100AX185 with the SAI100AX185
To replace the SI100AX185, order the SAI100AX185. Confirm the ISO 15552 mounting interface, the 100mm bore, 185mm stroke, G1/2 port (PT/G/NPT thread), and your mounting accessory. Because this SKU has no -S suffix, it cannot support a magnetic switch; order a magnet-equipped SAI if you need CS1-B/DS1-B sensing. Sizing checks: the 100mm bore yields 3927 N push at 0.5 MPa (5497 N at 0.7 MPa), while the neighbouring 80mm bore gives 2513 N. For vertical loads, a plain cylinder drifts on air loss—the cushion only decelerates—so specify an external pilot check valve or the SAIL/BSAI lock variant. The 185mm stroke is under the 300mm threshold, so rod-bending side-load risks are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX185
- ✓ 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 SI100AX185 FAQ
Yes, the SI100AX185 is discontinued. The direct replacement is the SAI100AX185. It shares the same ISO 15552 mounting interface, 100mm bore, 185mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The bore is 100mm with a G1/2 port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push 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 SAI100AX185
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX185 replacement — usually within 7-8 hours.