This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X220SCA, 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 SI50X220SCA
The AirTAC Airtac SI50 Standard Cylinder SI50X220SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 220mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X220SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke220 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X220SCA
- 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 SI50X220SCA
The AirTAC SI50X220SCA is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 220mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X220SCA, matching the bore, stroke, force, port and CA mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X220SCA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X220SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X220SCA |
| Bore size | Ø50 mm |
| Stroke | 220 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 SAI50X220SCA 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 SAI50X220SCA 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 SI50X220SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×220 | 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 SI50X220SCA Is Used
Package Diversion
Actuates routing gates on packaging lines where the 982N push force at 0.5MPa easily handles standard carton weights.
Clamp Actuation
Provides reliable clamping pressure for mid-weight machining fixtures, utilizing the 220mm stroke to clear the workpiece.
Replacing the Airtac SI50 Standard Cylinder SI50X220SCA with the SAI50X220SCA
To replace the SI50X220SCA, order the SAI50X220SCA to retain the exact ISO 15552 CA clevis mounting, 220mm stroke, G1/4 port and M16x1.5 rod thread. When sizing, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore provides 1559N; alternatively, raising pressure to 0.7MPa boosts this 50mm bore to 1374N. Because the 220mm stroke exceeds 300mm is false here, but always ensure guide alignment to prevent rod bending. Note that a plain cylinder drifts on air loss; for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X220SCA
- ✓ 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 SI50X220SCA FAQ
Yes, the SI50X220SCA is discontinued. The direct replacement is the SAI50X220SCA. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 220mm stroke, CA mounting, G1/4 port and output force.
This 50mm bore cylinder uses a G1/4 air port. The thrust is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X220SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X220SCA replacement — usually within 7-8 hours.