This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX850SH, 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 SI100BX850SH
The AirTAC Airtac SI100 Standard Cylinder SI100BX850SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 850mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX850SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX850SH
- 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 SI100BX850SH
The AirTAC SI100BX850SH is a discontinued double-acting ISO 15552 profile cylinder with an 850 mm stroke. Built for heavy-duty cycles, it delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100BX850SH, which retains the same interface, bore, stroke, and mounting fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific legacy unit features a SUS304 stainless rod (-B) and Viton H seals for 0-150 C environments.
Airtac SI100 Standard Cylinder SI100BX850SH Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX850SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX850SH |
| Bore size | Ø100 mm |
| Stroke | 850 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 SAI100BX850SH 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 SAI100BX850SH 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 SI100BX850SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×850 | 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 SI100BX850SH Is Used
Large Press Dampening
Uses the 850 mm stroke and 5497 N force at 0.7 MPa to absorb and move heavy press tooling, relying on the 36 mm adjustable air cushions for end-of-stroke deceleration.
Pallet Transfer Line
Shifts loaded pallets along a high-temperature packaging line, leveraging the Viton H seals and SUS304 stainless rod for thermal and corrosion resistance.
Vertical Lift Gate
Raises a 200 kg materials gate using the 3927 N push force at 0.5 MPa, requiring external guides to manage side loads over the 850 mm extension.
Replacing the Airtac SI100 Standard Cylinder SI100BX850SH with the SAI100BX850SH
To replace this SI100BX850SH, order the SAI100BX850SH and confirm the ISO 15552 mounting interface, G1/2 port, 850 mm stroke, and magnet (-S). The SAI family also adds SAIL (air-released lock), SAIF (built-in 4M valve), and BSAI (clamp-lock) variants the SI lacked. If sizing down, a 80 mm bore gives 2513 N push at 0.5 MPa; if sizing up, a 125 mm bore yields 6136 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. Because the 850 mm stroke is long, use external guides to prevent rod-bending and side-load damage. The -S magnet pairs with legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX850SH
- ✓ 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 SI100BX850SH FAQ
Yes, the SI100BX850SH is discontinued. The direct replacement is the SAI100BX850SH. It is dimensionally interchangeable per ISO 15552, keeping the same 100 mm bore, 850 mm stroke, G1/2 port, and mounting interface, but features an upgraded piston seal.
It has a G1/2 port. The force ratings 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 maximum of 801 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX850SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX850SH replacement — usually within 7-8 hours.