This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X100TC, 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 SI40X100TC
The AirTAC Airtac SI40 Standard Cylinder SI40X100TC 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 SAI40X100TC, 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 → SAI40X100TC
- 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 SI40X100TC
The AirTAC SI40X100TC is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 100 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. AirTAC replaced this unit with the SAI40X100TC direct replacement, featuring the same TC trunnion mount, M12x1.25 rod thread, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this specific SI SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor.
Airtac SI40 Standard Cylinder SI40X100TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X100TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X100TC |
| 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 SAI40X100TC 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 SAI40X100TC 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 SI40X100TC
| 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 SI40X100TC Is Used
Package Diversion
Pushes medium-weight cartons onto secondary packaging lines using the 628 N push force and 100 mm stroke.
Clamp Actuation
Secures aluminum extrusions during machining operations via the ISO 15552 TC trunnion mount for pivot alignment.
Replacing the Airtac SI40 Standard Cylinder SI40X100TC with the SAI40X100TC
To replace the SI40X100TC, order the SAI40X100TC. Confirm the ISO 15552 TC trunnion mounting interface, 40 mm bore, 100 mm stroke, G1/4 port (PT/G/NPT thread options), and note that this no-magnet SKU cannot support sensing. If you need more force, the neighboring 50 mm bore provides 982 N push at 0.5 MPa; if less is required, the 32 mm bore offers 402 N. Remember that a plain cylinder does not hold load on air loss—the cushion only decelerates. For secure holding, use an external rod lock, a pilot check valve, or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X100TC
- ✓ 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 SI40X100TC FAQ
Yes, the SI40X100TC is discontinued. The direct replacement is the SAI40X100TC. It shares the identical ISO 15552 TC mounting interface, 40 mm bore, 100 mm stroke, G1/4 port, and force ratings, fitting existing fixtures perfectly.
The 40 mm bore features a G1/4 port and provides 628 N push / 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X100TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X100TC replacement — usually within 7-8 hours.