This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX600S, 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 SI50BX600S
The AirTAC Airtac SI50 Standard Cylinder SI50BX600S 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 SAI50BX600S, 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 → SAI50BX600S
- 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 SI50BX600S
The AirTAC SI50BX600S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 600mm stroke, and SUS304 stainless steel rod. Delivering 982N push at 0.5MPa, its direct replacement is the SAI50BX600S, which retains the exact G1/4 port, M16x1.5 thread, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports CS1-B/DS1-B switches, while a plain cylinder drifts on air loss as cushions only decelerate.
Airtac SI50 Standard Cylinder SI50BX600S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX600S |
| 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 SAI50BX600S 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 SAI50BX600S 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 SI50BX600S
| 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 SI50BX600S Is Used
Long-Stroke Diversion
Pushes packages across a 600mm conveyor lane using the 982N force, with the SUS304 rod resisting humidity.
Stainless Pallet Stop
Acts as a high-corrosion-resistance stopper in washdown zones, holding position via a pilot check valve.
Replacing the Airtac SI50 Standard Cylinder SI50BX600S with the SAI50BX600S
To replace the SI50BX600S, order the SAI50BX600S and verify your ISO 15552 mounting fixtures, G1/4 port, and M16x1.5 rod thread. The -B rod is SUS304 stainless steel, and the -S magnet works with legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). At 0.5MPa it yields 982N push and 825N pull; if undersized, the neighbouring 63mm bore provides 1559N push. Because this is a 600mm stroke, use external guides to prevent rod bending and side-load damage. For load holding on air loss, add a pilot check valve or use the SAIL/BSAI lock variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX600S
- ✓ 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 SI50BX600S FAQ
Yes, the SI50BX600S is discontinued. The direct replacement is the SAI50BX600S. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 600mm stroke, 982N force, G1/4 port, and mounting interface.
The 50mm bore uses a G1/4 port. It delivers 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. The 600mm stroke operates at 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX600S replacement — usually within 7-8 hours.