This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX850, 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 SI100BX850
The AirTAC SI100 Standard Cylinder SI100BX850 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 SAI100BX850, 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 → SAI100BX850
- 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 SI100BX850
The AirTAC SI100BX850 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions at both ends. It delivers a push force of 3927 N at 0.5 MPa (5497 N at 0.7 MPa) and features a SUS304 stainless steel piston rod for corrosion resistance. AirTAC replaced this EOL unit with the SAI100BX850, a direct replacement sharing the exact same 100 mm bore, 850 mm stroke, G1/2 port, and ISO 15552 mounting interface.
The SAI upgrade introduces an advanced two Y-shaped one-way piston seal for low start-up pressure and extended life. This non-magnetic SKU cannot accept a sensor, unlike legacy CS1-B/DS1-B switches. Note that standard cylinders drift without live air; use an external rod lock or pilot check valve for load holding.
Airtac SI100 Standard Cylinder SI100BX850 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX850 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX850 |
| 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 SAI100BX850 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 SAI100BX850 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 SI100BX850
| 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 SI100BX850 Is Used
Large Part Ejection
Pushes heavy molded components out of press beds using the 3927 N push force at 0.5 MPa, with the 850 mm stroke clearing large tooling envelopes.
Vertical Material Lift
Raises or lowers loads up to 200 kg in automated handling lines, relying on external guides to manage the 850 mm stroke and prevent rod bending.
Corrosive Washdown
Actuates gates in washdown zones using the SUS304 stainless piston rod, while the ISO 15552 mounting interface ensures easy fixture retrofitting.
Replacing the Airtac SI100 Standard Cylinder SI100BX850 with the SAI100BX850
To replace the discontinued SI100BX850, order the SAI100BX850. Confirm the ISO 15552 mounting interface, 100 mm bore, 850 mm stroke, G1/2 port (PT/G/NPT thread options), and your specific mounting accessory. Because this SKU lacks the -S magnet, it cannot accept position sensors; if sensing is required, switch to a magnet-equipped SAI model. The SUS304 stainless rod is ideal for corrosive environments, while the Viton H seal option raises operating temperature to 150 C. For load holding on air loss, a plain cylinder drifts; specify the SAIL or BSAI lock variant, or an external pilot check valve. At 850 mm, this long stroke risks rod bending under side loads—always use external guides to prevent premature seal wear. If downsizing, a 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125 mm bore provides 6136 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX850
- ✓ 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 SI100BX850 FAQ
Yes, the SI100BX850 is discontinued. The direct replacement is the SAI100BX850. It shares the same ISO 15552 mounting interface, 100 mm bore, 850 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder has a G1/2 port. It delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX850
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX850 replacement — usually within 7-8 hours.