This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X100CB, 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 SI40 Standard Cylinder SI40X100CB
The AirTAC Airtac SI40 Standard Cylinder SI40X100CB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X100CB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X100CB
- 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 SI40 Standard Cylinder SI40X100CB
The AirTAC SI40X100CB is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 100mm stroke. Delivering 628N push and 528N pull at 0.5MPa via a G1/4 port, it is replaced by the SAI40X100CB. This direct successor shares the exact CB clevis mount, M12x1.25 rod thread, and 27mm cushions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors. For load holding, note that cushions only decelerate; use an external rod lock or SAIL variant.
Airtac SI40 Standard Cylinder SI40X100CB Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X100CB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X100CB |
| Bore size | Ø40 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40X100CB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAI40X100CB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40X100CB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SI40 Standard Cylinder SI40X100CB Is Used
Material Diversion
Actuates routing gates on conveyor lines, utilizing the 628N push force at 0.5 MPa to deflect packages efficiently.
Clamp Actuation
Provides repeatable 100mm stroke clamping for light machining fixtures, leveraging the 27mm adjustable air cushions.
Replacing the Airtac SI40 Standard Cylinder SI40X100CB with the SAI40X100CB
To replace the SI40X100CB, order the SAI40X100CB ensuring the ISO 15552 CB clevis interface, 40mm bore, 100mm stroke, and G1/4 port match. Because this specific SKU has no -S suffix, it cannot support magnetic sensing. If sizing alternatives, neighboring bores (32mm or 50mm) alter the 628N @0.5MPa force. A plain cylinder drifts on air loss; cushions only decelerate. For secure holding, specify an external pilot check valve or explore the SAIL lock and BSAI clamp-lock variants. The SAIF self-valve option is also available for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X100CB
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40X100CB FAQ
Yes, the SI40X100CB is discontinued. The direct replacement is the SAI40X100CB, which shares the identical ISO 15552 CB mounting interface, 40mm bore, 100mm stroke, output force, and G1/4 port size.
The 40mm bore features a G1/4 port and M12x1.25 rod. It delivers 628N push and 528N pull at 0.5 MPa, 879N push at 0.7 MPa, 1130N push at 0.9 MPa, and a maximum theoretical force of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X100CB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X100CB replacement — usually within 7-8 hours.