This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX600SH, 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 SI50BX600SH
The AirTAC Airtac SI50 Standard Cylinder SI50BX600SH 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 SAI50BX600SH, 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 → SAI50BX600SH
- 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 SI50BX600SH
The AirTAC SI50BX600SH is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 600mm stroke, and Viton H high-temperature seals (0-150 C). It features a SUS304 stainless steel piston rod (-B) and a built-in magnet (-S) for CS1-B/DS1-B legacy sensors. Delivering 982 N push at 0.5 MPa through its G1/4 port, it is replaced by the SAI50BX600SH.
The SAI50BX600SH is a direct replacement, preserving the exact ISO 15552 mounting interface, bore, stroke, and port. The SAI family upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SI50 Standard Cylinder SI50BX600SH Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX600SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX600SH |
| 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 SAI50BX600SH 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 SAI50BX600SH 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 SI50BX600SH
| 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 SI50BX600SH Is Used
High-Temp Diverting
Actuates routing gates on hot-end conveyors using the Viton H seals and 600mm reach to shift products between processing lanes.
Stainless Push-Off
Ejects washed components from washdown stations with the SUS304 rod, relying on the 982 N push force at 0.5 MPa.
Guided Vertical Lift
Lowers light tooling up to 50 kg over 600mm, requiring external linear guides to absorb side loads and prevent rod bending.
Replacing the Airtac SI50 Standard Cylinder SI50BX600SH with the SAI50BX600SH
To replace the SI50BX600SH with the SAI50BX600SH, verify the ISO 15552 mounting interface, 50mm bore, 600mm stroke, G1/4 port, and mounting accessory. Retain the -S magnet (for current AirTAC switches) and the -B SUS304 rod. The 600mm stroke demands an external guide to prevent rod bending and side-load wear. If sizing up, a 63mm bore offers 1559 N at 0.5 MPa; if sizing down, a 40mm bore gives 628 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX600SH
- ✓ 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 SI50BX600SH FAQ
Yes, the SI50BX600SH is discontinued. The direct replacement is the SAI50BX600SH. It shares the identical ISO 15552 mounting interface, 50mm bore, 600mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly.
The 50mm bore uses a G1/4 port. At 0.5 MPa it provides 982 N push and 825 N pull; at 0.7 MPa it pushes 1374 N; at 0.9 MPa it pushes 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX600SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX600SH replacement — usually within 7-8 hours.