This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X130STC, 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 SI50X130STC
The AirTAC SI50 Standard Cylinder SI50X130STC 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 SAI50X130STC, 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 → SAI50X130STC
- 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 SI50X130STC
The AirTAC SI50X130STC is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore, 130 mm stroke, and TC trunnion mounting. It delivers 982 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50X130STC, matching the bore, stroke, force, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S magnet supports CS1-B/DS1-B sensors, while Viton H seals raise heat to 150 C.
Airtac SI50 Standard Cylinder SI50X130STC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X130STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X130STC |
| 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 SAI50X130STC 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 SAI50X130STC 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 SI50X130STC
| 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 SI50X130STC Is Used
Package Diverting
Drives diverter arms on a packaging line, utilizing the 982 N push force to redirect cartons at high speed.
Pallet Lift Gate
Actuates a 50 kg capacity lift gate using the TC trunnion mount to handle angular movement safely.
Clamp Actuation
Secures workpieces in machining fixtures, relying on the 825 N pull force at 0.5 MPa for firm holding.
Replacing the Airtac SI50 Standard Cylinder SI50X130STC with the SAI50X130STC
To replace the SI50X130STC, order the SAI50X130STC. Verify the ISO 15552 TC trunnion mounting, 50 mm bore, 130 mm stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B switches. Sizing both ways: a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore yields 1559 N. If you need to hold a load vertically without live air, note that the air cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For this 130 mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X130STC
- ✓ 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 SI50X130STC FAQ
Yes, the SI50X130STC is discontinued. The direct replacement is the SAI50X130STC. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 50 mm bore, 130 mm stroke, G1/4 port, and TC trunnion mount.
This double-acting cylinder uses a G1/4 air port. It delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and 1767 N push at 0.9 MPa. The theoretical max force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X130STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X130STC replacement — usually within 7-8 hours.