This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X450S, 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 SID Series Double-Rod Cylinder SID50X450S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 450mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X450S
- 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 SID Series Double-Rod Cylinder SID50X450S
The AirTAC SID50X450S is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston. This geometry means both faces use the rod-side area, yielding equal push and pull force of 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. The bore is 50 mm, the rod is Ø20 mm, the port is G1/4, and the rod-end thread is M16x1.5. It has a 450 mm stroke, a 30 mm adjustable air cushion at each end, and operates at 30-800 mm/s.
The direct replacement is the SAID50X450S, sharing the same ISO 15552 mounting interface, bore, stroke, and force. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches. A plain cylinder drifts on air loss; the cushion only decelerates, so use an external rod lock for held loads.
Airtac SID Series Double-Rod Cylinder SID50X450S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X450S |
| Bore size | Ø50 mm |
| Stroke | 450 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 SAID50X450S 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 SAID50X450S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID50X450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 SID Series Double-Rod Cylinder SID50X450S Is Used
Dual-Tool Transfer
Drives two synchronized clamps or grippers from a single piston, using both extending rods to pick and place parts on a conveyor line simultaneously.
Anti-Rotation Lift
The twin rods prevent platform twist without needing external linear bearings.
Cam-Driven Sensing
Uses the rear exiting rod to carry a magnet cam past legacy CS1-B/DS1-B switches, providing precise end-of-stroke confirmation in tight spaces.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X450S with the SAID50X450S
To replace the discontinued SID50X450S, install the SAID50X450S direct. It matches the 50 mm bore, 450 mm stroke, G1/4 port, and ISO 15552 mounting (Basic, FA, LB, TC). Size both ways by checking the equal 825 N force at 0.5 MPa; if less force is needed, the 40 mm bore offers 528 N, and if more is needed, the 63 mm bore offers 1402 N. A double rod is right when you need anti-rotation, a back rod to carry a sensor cam, or to drive two tools. The -S magnet suits legacy CS1-B/DS1-B switches. For the 450 mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X450S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID50X450S FAQ
Yes, the SID50X450S is discontinued. The direct replacement is the SAID50X450S. It shares the same ISO 15552 mounting interface, 50 mm bore, 450 mm stroke, G1/4 port, and equal both-ways force. The SAI family also adds upgraded piston seals and SAIL/BSAI lock variants.
Being a double-rod cylinder, force is equal both ways: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. It operates at 30-800 mm/s and features a 30 mm adjustable air cushion at each end. The air cushion only decelerates near stroke end; it does not hold the load on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X450S replacement — usually within 7-8 hours.