This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX85, 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 SI100BX85
The AirTAC Airtac SI100 Standard Cylinder SI100BX85 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 SAI100BX85, 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 → SAI100BX85
- 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 SI100BX85
The AirTAC SI100BX85 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions. It delivers 3927 N push and 3681 N pull at 0.5 MPa, operating at 30-800 mm/s through a G1/2 port. The direct replacement is the SAI100BX85, which matches the exact bore, stroke, force, port and mounting interface.
Upgrading to the SAI keeps the ISO 15552 fixture dimensions but adds a superior piston seal with two Y-shaped one-way elements for low start-up pressure. This SKU has a SUS304 stainless steel rod (the -B option) but lacks a magnet, so it cannot accept position sensors. For load holding, note the air cushion only decelerates; use a SAIL lock variant or external pilot check valve.
Airtac SI100 Standard Cylinder SI100BX85 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX85 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX85 |
| 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 SAI100BX85 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 SAI100BX85 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 SI100BX85
| 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 SI100BX85 Is Used
Heavy Press Clamping
Secures large metal workpieces in machining fixtures, using the 3927 N push force at 0.5 MPa to prevent movement under cutting loads.
Pallet Diverting
Handles robust diverting of heavy pallets on assembly lines, with the SUS304 stainless rod offering corrosion resistance in humid washdown environments.
Replacing the Airtac SI100 Standard Cylinder SI100BX85 with the SAI100BX85
To replace this SI100BX85, order the SAI100BX85. It is a direct per the ISO 15552 mounting interface, keeping the 100 mm bore, 85 mm stroke, G1/2 port, M20x1.5 rod thread and 36 mm cushions. Confirm your mounting accessory (LB, FA, TC, etc.) and note this non-magnetic SKU cannot take CS1-B/DS1-B switches. If you need less force, a 80 mm bore yields 2513 N push at 0.5 MPa; if you need more, a 125 mm bore yields 6136 N. Because this is a plain double-acting cylinder, it will drift on air loss—use the SAIL or BSAI lock variant if you need to hold a load. The SAIF variant (bores 32-100) integrates a 4M valve if you need self-contained control.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX85
- ✓ 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 SI100BX85 FAQ
Yes, the SI100BX85 is discontinued. The direct replacement is the SAI100BX85. It shares the identical ISO 15552 mounting interface, 100 mm bore, 85 mm stroke, output force, G1/2 port and accessories, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder uses a G1/2 port and generates 3927 N push / 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. The adjustable air cushion is 36 mm at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX85
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX85 replacement — usually within 7-8 hours.