This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX85S, 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 SI100BX85S
The AirTAC Airtac SI100 Standard Cylinder SI100BX85S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 85mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX85S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX85S
- 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 SI100BX85S
The AirTAC SI100BX85S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX85S. This direct upgrade keeps the same 100mm bore, 85mm stroke, G1/2 port and mounting interface.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. Note: air cushions only decelerate; use SAIL or BSAI lock variants to hold loads.
Airtac SI100 Standard Cylinder SI100BX85S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX85S |
| Bore size | Ø100 mm |
| Stroke | 85 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 SAI100BX85S 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 SAI100BX85S 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 SI100BX85S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SI100BX85S Is Used
Heavy-Duty Stamping
Drives large press dies requiring 3927 N push force at 0.5 MPa, utilizing the SUS304 stainless rod for corrosion resistance in humid forming environments.
Pallet Diverting
Actuates heavy lane diverters on packaging lines, with the 85mm stroke providing rapid, full-stroke redirection of loaded pallets.
Replacing the Airtac SI100 Standard Cylinder SI100BX85S with the SAI100BX85S
To replace the SI100BX85S, order the SAI100BX85S. Verify the ISO 15552 mounting interface, 85mm stroke, G1/2 port, and -S magnet for CS1-B/DS1-B sensors. The -B rod is SUS304 stainless. If sizing down, the 80mm bore yields 2513 N push at 0.5 MPa; if sizing up, the 125mm bore yields 6136 N. A plain cylinder drifts on air loss—cushions only decelerate—so use an external rod lock or SAIL/BSAI variant for load holding. The SAIF variant (bores 32-100) integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX85S
- ✓ 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 SI100BX85S FAQ
Yes, the SI100BX85S is discontinued. The direct replacement is the SAI100BX85S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 85mm stroke, G1/2 port, and mounting fixtures.
It features a G1/2 air port. Force output is 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 SAI100BX85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX85S replacement — usually within 7-8 hours.