This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX185S, 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 SI100AX185S
The AirTAC SI100 Standard Cylinder SI100AX185S 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 SAI100AX185S, 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 → SAI100AX185S
- 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 SI100AX185S
The AirTAC SI100AX185S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 185mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX185S, matching the bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SI100AX185S includes the -S magnet for CS1-B/DS1-B switches and the -A SUS420J2 stainless rod. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI100 Standard Cylinder SI100AX185S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX185S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX185S |
| 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 SAI100AX185S 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 SAI100AX185S 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 SI100AX185S
| 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 SI100AX185S Is Used
Heavy-Duty Pressing
Drives robust stamping and forming actions where the 3927 N push force at 0.5 MPa is required to seat or secure heavy components.
Stainless Rod Washdown
Ideal for damp or corrosive manufacturing zones using the -A SUS420J2 stainless piston rod to resist rust while shifting heavy jigs.
Replacing the Airtac SI100 Standard Cylinder SI100AX185S with the SAI100AX185S
To replace the SI100AX185S, order the SAI100AX185S. Verify the ISO 15552 mounting interface, 100mm bore, 185mm stroke, G1/2 port (PT/G/NPT), M20x1.5 rod thread, and the -S magnet for current AirTAC switches. The -A code means a SUS420J2 stainless rod is fitted. Sizing both ways: a neighbouring 80mm bore gives 2513 N [email protected], while a 125mm bore yields 6136 N. A plain cylinder drifts on air loss since cushions only decelerate; use a pilot check valve or the SAIL/BSAI lock variant to hold loads. The 185mm stroke is under the 300mm side-load risk threshold, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX185S
- ✓ 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 SI100AX185S FAQ
Yes, the SI100AX185S is discontinued. The direct replacement is the SAI100AX185S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 185mm stroke, G1/2 port, and mounting interface.
It operates at 30-800 mm/s. Forces 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 max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX185S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX185S replacement — usually within 7-8 hours.