This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X50, 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 SID50X50
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 50mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X50
- 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 SID50X50
The AirTAC SID50X50 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal force in both directions (825 N at 0.5 MPa). Because both faces use the identical rod-side annular area, push and pull outputs match exactly. This discontinued model features a 50mm bore, 20mm piston rod, M16x1.5 rod thread, 30mm adjustable cushions, and a fixed G1/4 air port.
The direct replacement is the SAID50X50, which preserves the exact ISO 15552 mounting interface, bore, stroke, and equal-both-ways force. The upgraded SAI family utilizes a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S), so it cannot accept legacy CS1-B/DS1-B sensors. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X50 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X50 |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAID50X50 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 SAID50X50 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 SID50X50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SID50X50 Is Used
Synchronized Transfer
Drives opposing conveyor flights simultaneously using both rod ends, ensuring perfectly timed material transfer without phase drift.
Anti-Rotation Press
Applies 825 N of equal clamping force on both strokes, using the dual rods to prevent platen twist during precision seating tasks.
Dual-Tool End Effector
Mounts a gripper on the front rod and a secondary cam on the back rod to actuate a separate release mechanism within the same stroke.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X50 with the SAID50X50
To replace the discontinued SID50X50, install the direct replacement SAID50X50, which matches the G1/4 port, M16x1.5 rod, and ISO 15552 mounting dimensions (Basic, FA, LB, TC) without bracket machining. Size both directions by the equal force curve: 825 N at 0.5 MPa, or step down to a 40mm bore (528 N) / up to a 63mm bore (1402 N) if your payload shifts. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Because this non-magnetic SKU cannot carry a sensor cam, add an external -S magnet sleeve if switching detection is required. For this 50mm stroke, side-load stress is minimal, but any stroke over 300mm requires careful guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X50
- ✓ 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 SID50X50 FAQ
Yes, the SID50X50 is discontinued. The direct replacement is the SAID50X50, sharing the same ISO 15552 interface, 50mm bore, 50mm stroke, G1/4 port, and equal-both-ways force.
Force is equal both ways: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. The fixed air port is G1/4, with a 20mm rod, M16x1.5 thread, and 30mm adjustable cushions.
Request a Quote for the SAID50X50
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X50 replacement — usually within 7-8 hours.