This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX185, 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 SI100BX185
The AirTAC Airtac SI100 Standard Cylinder SI100BX185 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 SAI100BX185, 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 → SAI100BX185
- 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 SI100BX185
The AirTAC SI100BX185 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 185 mm stroke. Delivering 3927 N push and 3681 N pull at 0.5 MPa, it features a SUS304 stainless steel rod (-B) and a G1/2 port. The direct replacement is the SAI100BX185, matching the interface, force, and mounting exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor. For high heat, Viton H seals raise the operating range to 0-150 C.
Airtac SI100 Standard Cylinder SI100BX185 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX185 |
| 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 SAI100BX185 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 SAI100BX185 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 SI100BX185
| 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 SI100BX185 Is Used
Heavy-Duty Pressing
Applies the 5497 N push at 0.7 MPa for seating bearings and forming heavy components securely.
Pallet Diversion
Handles high side loads when indexing heavy pallets using the robust 25 mm piston rod.
Material Lift Stops
Acts as a hard mechanical stop for 200 kg vertical loads within automated storage systems.
Replacing the Airtac SI100 Standard Cylinder SI100BX185 with the SAI100BX185
To replace the SI100BX185, order the SAI100BX185. Verify the ISO 15552 mounting interface, 185 mm stroke, G1/2 port (PT/G/NPT thread), and your specific mounting accessory. Because this SKU lacks the -S magnet, it cannot support position sensing; if switches are needed, select an SAI model with the magnet option. The SUS304 rod (-B) provides corrosion resistance versus standard carbon steel. At 0.5 MPa, the 100 mm bore yields 3927 N push (7068 N at 0.9 MPa); if less force is acceptable, an 80 mm bore provides 2513 N. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve for bores up to 100 mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX185
- ✓ 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 SI100BX185 FAQ
Yes, the SI100BX185 is discontinued. The direct replacement is the SAI100BX185. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100 mm bore, 185 mm stroke, output force, G1/2 port, and mounting accessories.
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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX185
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