This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX10S, 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 SI50BX10S
The AirTAC SI50 Standard Cylinder SI50BX10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 10mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke10 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX10S
- 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 SI50BX10S
The AirTAC SI50BX10S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 10mm stroke, SUS304 stainless rod, and a G1/4 port. Delivering 982 N push at 0.5 MPa, it is replaced by the SAI50BX10S.
The SAI direct keeps the exact ISO 15552 mounting interface, force, and port. It upgrades the piston seal to two Y-shaped elements for low start-up pressure. The -S magnet works with CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50BX10S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX10S |
| Bore size | Ø50 mm |
| Stroke | 10 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 SAI50BX10S 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 SAI50BX10S 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 SI50BX10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×10 | 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 SI50BX10S Is Used
Short-Stroke Clamping
Ideal for compact clamping tasks where a 10mm stroke securely holds workpieces without occupying excessive machine space.
Product Diverting
Provides fast actuation at 30-800 mm/s for diverting small packages or parts on a conveyor line using the 982 N push force.
Lab Test Fixtures
The SUS304 stainless rod and 50 kg vertical lift capacity make it suitable for precise, repeatable testing jigs.
Replacing the Airtac SI50 Standard Cylinder SI50BX10S with the SAI50BX10S
To replace the SI50BX10S, order the SAI50BX10S. Confirm the ISO 15552 mounting, G1/4 port, and the -S magnet for CS1-B/DS1-B switches. The SUS304 rod resists corrosion. For higher force, the 63mm bore yields 1559 N; for less, the 40mm gives 628 N. A plain cylinder drifts on air loss; for load holding use an external rod lock or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX10S
- ✓ 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 SI50BX10S FAQ
Yes, the SI50BX10S is discontinued. The direct replacement is the SAI50BX10S, which matches the ISO 15552 mounting interface, 50mm bore, 10mm stroke, and G1/4 port.
The G1/4 port bore delivers 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX10S replacement — usually within 7-8 hours.