This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X300, 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 SID50X300
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 300mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X300
- 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 SID50X300
The AirTAC SID50X300 is a double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Because both faces use the rod-side area, push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This SKU has no -S magnet and cannot take a sensor. The bore is 50 mm, the air port is G1/4, the rod-end thread is M16x1.5, and adjustable air cushion is 30 mm at each end. The SID50X300 is discontinued and end-of-life.
The direct replacement is the SAID50X300, matching the ISO 15552 interface, 300 mm stroke, force, and mounting. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. A double rod provides anti-rotation stability and lets the back rod carry a sensor cam or drive two tools.
Airtac SID Series Double-Rod Cylinder SID50X300 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X300 |
| Bore size | Ø50 mm |
| Stroke | 300 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 SAID50X300 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 SAID50X300 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 SID50X300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×300 | 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 SID50X300 Is Used
Dual-Tool Machining Station
Drives two opposing machining heads from a single piston, utilizing the equal both ways force to maintain perfectly synchronized cutting cycles.
Anti-Rotation Transfer Gate
Uses the twin rods exiting both ends to prevent mechanical twist during rapid part diversion on a high-speed packaging line.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X300 with the SAID50X300
To replace the discontinued SID50X300, install the direct replacement SAID50X300, which reuses the exact ISO 15552 mounting interface and G1/4 port. Size both ways by confirming the 825 N @0.5 MPa equal force fits your load, or step to neighbour bores like 40 mm or 63 mm for different force requirements. Choose a double rod when you need anti-rotation stability or must drive two tools from one piston. Basic, FA, LB, and TC mounting styles are supported. This SKU lacks the -S magnet, so it cannot accept legacy CS1-B or DS1-B sensors. For the 300 mm stroke, add external guides to prevent rod-bending under side-load. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X300
- ✓ 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 SID50X300 FAQ
Yes, the AirTAC SID50X300 is discontinued. The direct replacement is the SAID50X300, which matches the ISO 15552 interface, 300 mm stroke, equal force, G1/4 port, and mounting hardware.
Force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It operates at 0.15-1.0 MPa, has a G1/4 port, M16x1.5 rod thread, 30 mm adjustable cushion, and 30-800 mm/s speed. The air cushion only decelerates near stroke end; it does not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X300
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X300 replacement — usually within 7-8 hours.