This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X150TC, 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 SI50 Standard Cylinder SI50X150TC
The AirTAC Airtac SI50 Standard Cylinder SI50X150TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X150TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X150TC
- 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 SI50 Standard Cylinder SI50X150TC
The AirTAC SI50X150TC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 150mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X150TC, a direct upgrade retaining the exact TC trunnion mount, M16x1.5 rod thread, and 30mm cushions.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this non-S SKU lacks a magnet and cannot accept CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X150TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X150TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X150TC |
| Bore size | Ø50 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X150TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X150TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X150TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | 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 SI50 Standard Cylinder SI50X150TC Is Used
Conveyor Diverter
Actuates a routing gate on a packaging line, utilizing the 982N push force at 0.5MPa to deflect cartons reliably at speeds up to 800mm/s.
Clamp Actuation
Secures medium workpieces in a machining fixture, providing 825N pull force at 0.5MPa to hold the part firmly during light milling operations.
Replacing the Airtac SI50 Standard Cylinder SI50X150TC with the SAI50X150TC
To replace the SI50X150TC, order the SAI50X150TC. Confirm the ISO 15552 TC trunnion interface, 50mm bore, 150mm stroke, G1/4 port, and M16x1.5 thread. Because this specific SKU has no -S magnet, it cannot support position sensing; if switches are needed, specify an SAI50X150TCS. For sizing alternatives, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore provides 1559N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding explore the SAIL lock, BSAI clamp-lock, or an external pilot check valve. At 150mm stroke, side-load and rod-bending risks are minimal, but ensure alignment to prevent seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X150TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X150TC FAQ
Yes, the SI50X150TC is discontinued. The direct replacement is the AirTAC SAI50X150TC. It shares the identical ISO 15552 mounting interface, 50mm bore, 150mm stroke, G1/4 port, and TC trunnion mount, fitting existing fixtures perfectly while upgrading the piston seal.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X150TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X150TC replacement — usually within 7-8 hours.