This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX60S, 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 SI50BX60S
The AirTAC Airtac SI50 Standard Cylinder SI50BX60S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 60mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX60S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke60 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX60S
- 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 SI50BX60S
The AirTAC SI50BX60S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 60mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50BX60S, matching the interface, force, and stroke.
This SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure. The SI50BX60S uses a SUS304 stainless rod and a piston magnet for CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50BX60S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX60S |
| Bore size | Ø50 mm |
| Stroke | 60 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 SAI50BX60S 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 SAI50BX60S 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 SI50BX60S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×60 | 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 SI50BX60S Is Used
Stainless Rod Clamping
Ideal for applying repeatable 982N clamping force on machining lines, utilizing the SUS304 rod for corrosion resistance in wet environments.
Short-Stroke Diverting
Provides snappy 60mm actuation to divert packages on conveyors, operating efficiently at 30-800 mm/s with position feedback.
Replacing the Airtac SI50 Standard Cylinder SI50BX60S with the SAI50BX60S
To replace the SI50BX60S, order the SAI50BX60S, confirming the ISO 15552 mounting interface, 50mm bore, 60mm stroke, G1/4 port, and magnet. The SUS304 stainless rod is retained. Sizing both ways: a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX60S
- ✓ 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 SI50BX60S FAQ
Yes, the SI50BX60S is discontinued. The direct replacement is the SAI50BX60S. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 60mm stroke, G1/4 port, and mounting interface.
The G1/4 port feeds a 50mm bore that generates 982N push and 825N pull at 0.5 MPa, 1374N push at 0.7 MPa, 1767N at 0.9 MPa, and a maximum theoretical force of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX60S replacement — usually within 7-8 hours.