This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX600, 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 SI50BX600
The AirTAC Airtac SI50 Standard Cylinder SI50BX600 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 SAI50BX600, 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 → SAI50BX600
- 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 SI50BX600
The AirTAC SI50BX600 is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 600 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. The direct successor is the SAI50BX600, matching the interface, force, and mounting.
This SKU features a SUS304 stainless piston rod (-B) for corrosion resistance but lacks a magnet, meaning it cannot accept a sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI50 Standard Cylinder SI50BX600 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX600 |
| 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 SAI50BX600 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 SAI50BX600 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 SI50BX600
| 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 SI50BX600 Is Used
Long-Stroke Diversion
Pushes packages across a 600 mm conveyor lane using the 982 N push force, guided externally to prevent rod bending.
Corrosive Washdown
Actuates a cleaning station flap using the SUS304 stainless rod option, resisting moisture without a position sensor.
Replacing the Airtac SI50 Standard Cylinder SI50BX600 with the SAI50BX600
To replace the SI50BX600, order the SAI50BX600. Verify the ISO 15552 mounting interface, 600 mm stroke, and G1/4 port. This unit has no magnet (-S), so position sensing is impossible; add the S suffix if switches are needed. At 0.5 MPa, push is 982 N; stepping up to the 63 mm bore yields 1559 N. Because this is a 600 mm stroke, use external guides to prevent rod bending and side loads. The cushion only decelerates; for load holding on air loss, use an external pilot check valve or the SAIL lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX600
- ✓ 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 SI50BX600 FAQ
Yes, the SI50BX600 is discontinued. The direct replacement is the SAI50BX600, a true ISO 15552 profile cylinder that matches the 50 mm bore, 600 mm stroke, G1/4 port, and mounting dimensions for a direct fixture fit.
The G1/4 port feeds a 50 mm bore yielding 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical max of 200 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX600
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX600 replacement — usually within 7-8 hours.