This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X150TC, 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 SI40X150TC
The AirTAC Airtac SI40 Standard Cylinder SI40X150TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X150TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X150TC
- 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 SI40X150TC
The AirTAC SI40X150TC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 150mm stroke. Delivering 628 N push force at 0.5 MPa via a G1/4 port, its direct replacement is the SAI40X150TC. This current-production SAI model shares the exact ISO 15552 mounting interface, TC trunnion, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S), meaning it cannot accept CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X150TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X150TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X150TC |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAI40X150TC 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 SAI40X150TC 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 SI40X150TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 SI40X150TC Is Used
Package Diverting
Drives diverting arms on packaging lines, utilizing the 628 N push force to redirect moderate-weight cartons reliably at 30-800 mm/s.
Clamp Actuation
Actuates secondary clamping fixtures in CNC machining cells, where the TC trunnion handles mid-stroke pivoting smoothly.
Gate Control
Operates sorting gates in automated material handling systems, providing consistent 150mm travel for package routing.
Replacing the Airtac SI40 Standard Cylinder SI40X150TC with the SAI40X150TC
To replace the SI40X150TC, order the SAI40X150TC and verify the ISO 15552 TC trunnion mounting, 150mm stroke, and G1/4 port. Because this SKU has no magnet, you cannot mount position sensors; if sensing is required, select an SAI40X150 model with an S suffix for CS1-B/DS1-B compatibility. At 150mm stroke, side-load and rod-bending risks are minimal, but ensure guide alignment to prevent seal wear. If neighbouring bores are considered, a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore provides 982 N. Remember, a standard cylinder drifts on air loss; the 27mm adjustable cushion only decelerates near stroke end. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X150TC
- ✓ 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 SI40X150TC FAQ
Yes, the SI40X150TC is discontinued. The direct replacement is the SAI40X150TC. It shares the same ISO 15552 mounting interface, 40mm bore, 150mm stroke, G1/4 port, and TC trunnion, fitting directly into existing setups.
This double-acting cylinder features a G1/4 port and generates 628 N push / 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and 1130 N push at 0.9 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X150TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X150TC replacement — usually within 7-8 hours.