This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X100CA, 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 SI50X100CA
The AirTAC Airtac SI50 Standard Cylinder SI50X100CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X100CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X100CA
- 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 SI50X100CA
The AirTAC SI50X100CA is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 100mm stroke. It delivers 982N push force at 0.5MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50X100CA, a direct upgrade sharing the exact same CA clevis mounting interface, bore, and output force.
The SAI replacement retains all original ratings but introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X100CA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X100CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X100CA |
| Bore size | Ø50 mm |
| Stroke | 100 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 SAI50X100CA 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 SAI50X100CA 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 SI50X100CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SI50X100CA Is Used
Package Diverting
Actuates routing gates on packaging lines where 982N push force easily deflects medium-weight cartons at 100mm stroke.
Clamp Actuation
Provides reliable clamping pressure for machining fixtures, utilizing the CA clevis to accommodate slight angular alignment.
Stopper Arms
Raises and lowers pallet stoppers in material handling zones, with the 50kg vertical lift capacity handling standard pallet loads safely.
Replacing the Airtac SI50 Standard Cylinder SI50X100CA with the SAI50X100CA
To replace the SI50X100CA, order the SAI50X100CA. Confirm the ISO 15552 CA clevis mounting, 50mm bore, 100mm stroke, and G1/4 port (PT/G/NPT thread options). Because this SKU has no magnet, it cannot support position sensing; if you need switches, select an SAI50X100CAS and use current AirTAC sensors. Sizing both ways: this bore yields 982N push at 0.5MPa; if you need less force, the 40mm bore offers 628N, and for more, the 63mm bore provides 1559N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X100CA
- ✓ 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 SI50X100CA FAQ
Yes, the SI50X100CA is discontinued. The direct replacement is the SAI50X100CA. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 100mm stroke, CA clevis mount, and G1/4 port, so it drops directly into existing fixtures.
This 50mm bore cylinder features a G1/4 air port and M16x1.5 rod thread. The thrust is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, with a theoretical maximum force of 200kgf at 1.0MPa. It operates at speeds of 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X100CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X100CA replacement — usually within 7-8 hours.