This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X350, 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 SID50X350
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 350mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X350
- 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 SID50X350
The AirTAC SID50X350 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force (825 N @0.5 MPa). Because both faces use the rod-side area, force is identical in both directions. This legacy unit is discontinued; the direct replacement is the SAID50X350, matching the 50mm bore, 350mm stroke, G1/4 port, and ISO 15552 mounting interface.
The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. Without a -S suffix, this SKU cannot take a magnetic switch. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID50X350 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X350 |
| Bore size | Ø50 mm |
| Stroke | 350 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 SAID50X350 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 SAID50X350 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 SID50X350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SID50X350 Is Used
Dual-Tool Transfer
Simultaneously drives two separate pick-and-place mechanisms from one common piston, keeping stroke timing perfectly synchronized without external linkages.
Anti-Rotation Lift
The twin-rod architecture prevents mechanical twist during vertical elevation, securely handling payloads up to 42kg without needing an external linear guide.
Equal-Force Clamping
Provides identical 825N clamping and release pressure at 0.5MPa, ensuring delicate workpieces are held securely and released smoothly without force spikes.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X350 with the SAID50X350
To replace the discontinued SID50X350, install the SAID50X350 directly—it preserves the ISO 15552 mounting interface, 350mm stroke, G1/4 port, and equal-both-ways force. Because force is equal in both directions, size it by checking neighbour bores (40mm or 63mm) against your exact bidirectional load. A double-rod design is right when you need anti-rotation stability or need to drive two tools. Mounting options include FA, LB, and TC. As this is a non-magnetised SKU (no -S), it cannot accept legacy CS1-B/DS1-B sensors. For the 350mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X350
- ✓ 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 SID50X350 FAQ
Yes, the SID50X350 is discontinued. The direct replacement is the SAID50X350, which shares the same ISO 15552 interface, 350mm stroke, G1/4 port, and equal both-ways force.
The G1/4 port feeds equal both-ways forces of 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. Air cushions only decelerate; use an external rod lock or SAIL/BSAI variant to hold loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X350
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X350 replacement — usually within 7-8 hours.