This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X700S, 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 SID50X700S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X700S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X700S
- 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 SID50X700S
The AirTAC SID50X700S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways (825 N at 0.5 MPa). This 50 mm bore unit features a 20 mm piston rod, M16x1.5 rod thread, and G1/4 air ports. Because the SID series is discontinued, the direct replacement is the SAID50X700S. It shares the same ISO 15552 mounting interface, 700 mm stroke, and adjustable 30 mm cushions, while the SAI family introduces an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life.
The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Remember that air cushions only decelerate near stroke end; a plain cylinder does not hold loads on air loss, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X700S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X700S |
| Bore size | Ø50 mm |
| Stroke | 700 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 SAID50X700S 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 SAID50X700S 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 SID50X700S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×700 | 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 SID50X700S Is Used
Equal-Force Transfer
Drives a conveyor pusher where the equal both-ways force ensures consistent pressure on the forward and return strokes without requiring a larger bore.
Dual-Tool Machining
Operates two opposing tools simultaneously from a single piston, using the second rod end to carry a sensor cam for precise position feedback.
Anti-Rotation Lift
Lifts a 42 kg vertical payload using the double-rod symmetry to prevent twist and maintain alignment without external linear bearings.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X700S with the SAID50X700S
To replace the discontinued SID50X700S, specify the SAID50X700S, which provides an direct swap retaining the G1/4 port, 700 mm stroke, and ISO 15552 dimensions. When sizing both ways, verify the equal both-ways force of 825 N at 0.5 MPa is sufficient, or step up to a 63 mm bore if more thrust is needed. Choose a double-rod configuration when you need anti-rotation stability or when the back rod must carry a sensor cam. Mounting options include FA, LB, and TC brackets. The -S magnet supports legacy CS1-B/DS1-B switches. Because the 700 mm stroke is long, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X700S
- ✓ 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 SID50X700S FAQ
Yes, the SID50X700S is discontinued. The direct replacement is the SAID50X700S. It shares the same ISO 15552 mounting interface, 50 mm bore, 700 mm stroke, G1/4 port, and equal both-ways force, while adding an upgraded piston seal.
The force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It uses a G1/4 air port, a 20 mm rod, M16x1.5 thread, and operates at speeds of 30-800 mm/s with 30 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X700S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X700S replacement — usually within 7-8 hours.