This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X185S, 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 SI100X185S
The AirTAC Airtac SI100 Standard Cylinder SI100X185S 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 SAI100X185S, 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 → SAI100X185S
- 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 SI100X185S
The AirTAC SI100X185S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 185 mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa using a G1/2 port. The direct replacement is the SAI100X185S, matching the bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked. This -S model uses CS1-B/DS1-B sensors; a plain SI cannot hold load without live air.
Airtac SI100 Standard Cylinder SI100X185S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X185S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X185S |
| 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 SAI100X185S 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 SAI100X185S 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 SI100X185S
| 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 SI100X185S Is Used
Heavy Stamping Press
Drives heavy stamping actuators delivering 3927 N push force at 0.5 MPa for forming thick metal components.
Pallet Diverting
Actuates large pallet diverters on high-throughput packaging lines, handling the 185 mm stroke requirement smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100X185S with the SAI100X185S
To replace the SI100X185S, order the SAI100X185S. Verify the ISO 15552 mounting interface, 100 mm bore, 185 mm stroke, G1/2 port (PT/G/NPT) and the -S magnet for CS1-B/DS1-B switches. The SAI uses current AirTAC switches. For sizing, a 100 mm bore yields 3927 N push at 0.5 MPa; neighbouring 80 mm and 125 mm bores offer 2513 N and 6136 N respectively. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SAIF self-valve variant also fits bores up to 100. At 185 mm stroke, rod bending stress is low, but always guide the load to prevent side-loading.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X185S
- ✓ 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 SI100X185S FAQ
Yes, the SI100X185S is discontinued. The direct replacement is the SAI100X185S. It shares the same ISO 15552 mounting interface, 100 mm bore, 185 mm stroke, output force, G1/2 port and accessories, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/2 port. It delivers 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 force of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X185S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X185S replacement — usually within 7-8 hours.