This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X130, 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 SI50X130
The AirTAC Airtac SI50 Standard Cylinder SI50X130 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 SAI50X130, 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 → SAI50X130
- 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 SI50X130
The AirTAC SI50X130 is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 130 mm stroke, delivering 982 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI50X130, a direct upgrade retaining the exact ISO 15552 mounting interface, G1/4 port, and M16x1.5 rod thread. The SAI features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life.
Because this specific SKU lacks the -S magnet suffix, it cannot accept a position sensor. For high-temperature environments beyond the standard -20 to +70 C range, Viton H seals are available, and load-holding requires external valves since cushions only decelerate.
Airtac SI50 Standard Cylinder SI50X130 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X130 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X130 |
| 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 SAI50X130 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 SAI50X130 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 SI50X130
| 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 SI50X130 Is Used
Package Diverting
Actuates routing gates on packaging lines where 982 N push force easily overcomes friction to redirect cartons at 30-800 mm/s.
Light Pressing
Provides consistent downward pressure for pin insertion or light stamping tasks, utilizing the 825 N pull force at 0.5 MPa.
Replacing the Airtac SI50 Standard Cylinder SI50X130 with the SAI50X130
To replace the discontinued SI50X130, order the SAI50X130 direct equivalent, verifying your ISO 15552 mounting accessory (LB, FA, TC, etc.), G1/4 port thread (PT/G/NPT), and 130 mm stroke. If position sensing is required, note this non-magnetic SKU cannot support switches; you must select an SAI50X130S variant instead. Sizing both ways: the 50 mm bore yields 982 N push at 0.5 MPa, while the neighboring 40 mm bore offers 628 N and the 63 mm provides 1559 N. A plain cylinder drifts on air loss, so for load holding consider the SAIL lock or BSAI clamp-lock variants, or an external pilot check valve. Since the 130 mm stroke is under 300 mm, rod-bending side loads are minimal, but standard guide rules still apply.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X130
- ✓ 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 SI50X130 FAQ
Yes, the SI50X130 is discontinued. The direct replacement is the AirTAC SAI50X130. It is dimensionally interchangeable per ISO 15552, matching the 50 mm bore, 130 mm stroke, G1/4 port, and mounting interface, so it fits existing fixtures perfectly.
The 50 mm bore features a G1/4 air port and M16x1.5 rod thread. It delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum force of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X130
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X130 replacement — usually within 7-8 hours.