This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX40, 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 SI100BX40
The AirTAC Airtac SI100 Standard Cylinder SI100BX40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX40
- 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 SI100BX40
The AirTAC SI100BX40 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 40 mm stroke. Featuring a SUS304 stainless steel piston rod, it delivers a push force of 3927 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI100BX40, a direct replacement retaining the exact ISO 15552 mounting interface, G1/2 port, and output force.
The SAI upgrade introduces an advanced two Y-shaped one-way piston seal for lower start-up pressure and extended life. Note this SKU lacks a magnet, so it cannot accept position switches.
Airtac SI100 Standard Cylinder SI100BX40 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX40 |
| Bore size | Ø100 mm |
| Stroke | 40 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 SAI100BX40 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 SAI100BX40 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 SI100BX40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SI100BX40 Is Used
Heavy-Duty Pressing
Drives robust clamping and pressing actions in automated machinery, utilizing its 3927 N push force at 0.5 MPa to seat components firmly.
Pallet Dispenser
Actuates heavy pallet handling mechanisms in packaging lines, where the SUS304 stainless rod provides excellent corrosion resistance.
Material Lowering
Controls the smooth descent of heavy loads using its adjustable air cushions, safely decelerating the 25 mm rod near the stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100BX40 with the SAI100BX40
To replace the SI100BX40, order the SAI100BX40. Verify the ISO 15552 mounting interface, the 100 mm bore, the 40 mm stroke, and the G1/2 port (available in PT, G, or NPT). Because this is a no-magnet SKU, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, select an SAI equivalent with the -S magnet option. Sizing context: stepping down to an 80 mm bore gives 2513 N push at 0.5 MPa, while this 100 mm bore provides 3927 N. For load holding on air loss, note that a plain cylinder drifts; the cushion only decelerates. Use an external pilot check valve or explore SAIL and BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX40
- ✓ 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 SI100BX40 FAQ
Yes, the AirTAC SI100BX40 is discontinued. The direct replacement is the SAI100BX40. It is dimensionally interchangeable per ISO 15552, keeping the same 100 mm bore, 40 mm stroke, G1/2 port, and mounting accessories.
At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX40
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX40 replacement — usually within 7-8 hours.