This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX130, 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 SI50BX130
The AirTAC SI50 Standard Cylinder SI50BX130 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 130mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX130, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke130 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX130
- 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 SI50BX130
The AirTAC SI50BX130 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 130mm stroke. It delivers 982 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50BX130, matching the exact bore, stroke, force, port and ISO 15552 mounting interface.
This SKU features a SUS304 stainless steel rod for corrosion resistance but lacks a magnet, so it cannot accept position switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI50 Standard Cylinder SI50BX130 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX130 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX130 |
| Bore size | Ø50 mm |
| Stroke | 130 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 SAI50BX130 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 SAI50BX130 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 SI50BX130
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×130 | 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 SI50BX130 Is Used
Stainless Rod Clamping
Ideal for clamping machined parts in humid washdown environments using the SUS304 rod option to prevent corrosion.
Package Diverting
Provides reliable 982 N push force at 0.5 MPa for diverting medium-weight cartons on a packaging line.
Replacing the Airtac SI50 Standard Cylinder SI50BX130 with the SAI50BX130
To replace the SI50BX130, order the SAI50BX130 and verify the ISO 15552 mounting interface, G1/4 port, and 130mm stroke. This non-magnetic SKU cannot take sensors; if sensing is needed, specify an SAI with a magnet. For higher loads, the 63mm bore offers 1559 N push at 0.5 MPa, while the 40mm bore provides 628 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 130mm stroke, rod bending is minimal, but always guide the load to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX130
- ✓ 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 SI50BX130 FAQ
Yes, the SI50BX130 is discontinued. The direct replacement is the SAI50BX130, which shares the same ISO 15552 mounting interface, 50mm bore, 130mm stroke, force, and G1/4 port.
It has a G1/4 port and delivers 982 N push / 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. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX130
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX130 replacement — usually within 7-8 hours.