This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X50LB, 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 SID50X50LB
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X50LB 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 SAID50X50LB, 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 → SAID50X50LB
- 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 SID50X50LB
The AirTAC SID50X50LB is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force is equal both ways at 825 N @0.5 MPa. This SKU is discontinued; the direct replacement is the SAID50X50LB, matching the 50mm bore, 50mm stroke, G1/4 port, and LB mount. The SAI family upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life.
Because the rod-side area drives both faces, force remains identical in extension and retraction. This non-magnetic SKU lacks a -S sensor band, so it cannot accept magnetic switches. Note that air cushions only decelerate the piston near stroke end; they do not hold loads on air loss, requiring an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X50LB Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X50LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X50LB |
| 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 SAID50X50LB 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 SAID50X50LB 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 SID50X50LB
| 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 SID50X50LB Is Used
Equal-Force Transfer
Drives a conveyor divert arm where identical push and pull thrust of 825 N @0.5 MPa ensures consistent bi-directional positioning without momentum shifts.
Dual-Tool Machining
Operates an opposing tool station using the rear rod extension, allowing two operations to be synchronized from one 50mm bore piston.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X50LB with the SAID50X50LB
To replace the discontinued SID50X50LB, specify the SAID50X50LB, which reuses the exact ISO 15552 interface, LB mounting accessory, and G1/4 port. Size both ways by confirming the equal force of 825 N @0.5 MPa meets your needs, or step to neighbouring bores like 40mm or 63mm for different thrusts. A double-rod design is right when you need equal both-ways force, anti-rotation stability, or a back rod to carry a sensor cam. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes >=300mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X50LB
- ✓ 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 SID50X50LB FAQ
Yes, the SID50X50LB is discontinued. The direct replacement is the SAID50X50LB, matching the 50mm bore, 50mm stroke, G1/4 port, and LB mount. The SAI family also adds an upgraded piston seal and new SAIL/BSAI lock variants.
Force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50mm with a G1/4 air port, a 20mm rod, M16x1.5 thread, and 30mm adjustable cushions. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X50LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X50LB replacement — usually within 7-8 hours.