This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X600TC, 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 SI50X600TC
The AirTAC Airtac SI50 Standard Cylinder SI50X600TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X600TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X600TC
- 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 SI50X600TC
The AirTAC SI50X600TC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 600mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X600TC, a direct sharing the same TC trunnion mount, bore, and output. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Because this SKU lacks the -S magnet suffix, it cannot accept position sensors like the legacy CS1-B/DS1-B switches. The SAI family also introduces variants the original SI lacked, such as the SAIL air-released lock and BSAI clamp-lock for secure load holding. Note that on a 600mm stroke, external guides are recommended to prevent rod bending and side-load wear.
Airtac SI50 Standard Cylinder SI50X600TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X600TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X600TC |
| Bore size | Ø50 mm |
| Stroke | 600 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 SAI50X600TC 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 SAI50X600TC 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 SI50X600TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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 SI50X600TC Is Used
Long-Stroke Diversion
Drives 600mm pusher arms on packaging lines to divert products between parallel conveyor belts using the 982N force output.
Vertical Material Lift
Raises light pallets or tote bins up to 50kg in automated storage systems, requiring external guides to stabilize the extended rod.
Automated Door Actuation
Opens and closes large machine safety enclosures or heavy blast gates where a 600mm travel distance is required.
Replacing the Airtac SI50 Standard Cylinder SI50X600TC with the SAI50X600TC
To replace the SI50X600TC, order the SAI50X600TC. Verify the ISO 15552 interface, 50mm bore, 600mm stroke, G1/4 port, and TC trunnion mounting accessory. This non-magnetic SKU cannot support switches, so if sensing is needed, specify an SAI model with the S magnet option. For sizing, the 50mm bore yields 982N push at 0.5MPa; stepping down to a 40mm bore drops force to 628N, while stepping up to 63mm increases it to 1559N. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants. Finally, at 600mm stroke, use external guides to manage rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X600TC
- ✓ 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 SI50X600TC FAQ
Yes, the SI50X600TC is discontinued. The direct replacement is the SAI50X600TC. It shares the identical ISO 15552 mounting interface, 50mm bore, 600mm stroke, output force, G1/4 port, and TC trunnion mount, fitting directly into existing fixtures.
The 50mm bore features a G1/4 air port and provides 982N push and 825N pull at 0.5MPa. At 0.7MPa it pushes 1374N, and 1767N at 0.9MPa. The theoretical maximum force is 200kgf at 1.0MPa. It operates at 30-800mm/s with a 30mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X600TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X600TC replacement — usually within 7-8 hours.