This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID80X350SLB, 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 SID80X350SLB
The AirTAC Airtac SID Series Double-Rod Cylinder SID80X350SLB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID80X350SLB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAID80X350SLB
- 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 SID80X350SLB
The AirTAC SID80X350SLB is a discontinued ISO 15552 double-acting double-rod cylinder with a 350 mm stroke and LB mounting interface. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal (2268 N at 0.5 MPa). The direct replacement is the SAID80X350SLB, sharing the same 80 mm bore, G3/8 port, and dimensions. The SAI family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
With a 25 mm rod and M20x1.5 thread, it delivers 3175 N at 0.7 MPa and 4082 N at 0.9 MPa both ways. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. 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 SID80X350SLB Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID80X350SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID80X350SLB |
| Bore size | Ø80 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID80X350SLB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAID80X350SLB 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 SID80X350SLB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SID80X350SLB Is Used
Equal-Force Transfer
Drives a conveyor pusher where identical push and pull force (2268 N at 0.5 MPa) ensures consistent forward and reverse indexing without momentum shifts.
Dual-Tool Machining
Uses both protruding rods to drive two opposing machining heads simultaneously, maintaining perfect parallelism via the single internal piston.
Guided Ejection
Ejects long workpieces from a press using the second rod end to mount a sensor cam, tracking position while handling the 350 mm stroke with external guides.
Replacing the Airtac SID Series Double-Rod Cylinder SID80X350SLB with the SAID80X350SLB
To replace the discontinued SID80X350SLB, install the SAID80X350SLB directly—it matches the ISO 15552 interface, 350 mm stroke, LB mount, and G3/8 port without mechanical changes. Size both ways by checking equal force: the 80 mm bore yields 2268 N at 0.5 MPa, sitting between the 63 mm (1402 N) and 100 mm (3681 N) bores. A double-rod design is right when you need equal push/pull force, anti-rotation stability, or a back rod to carry a sensor cam. Because stroke is 350 mm, provide external guides to prevent rod bending under side loads. Select the -S option for magnet sensing.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID80X350SLB
- ✓ 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 SID80X350SLB FAQ
Yes, the SID80X350SLB is discontinued. The direct replacement is the SAID80X350SLB, which shares the same ISO 15552 interface, 80 mm bore, 350 mm stroke, G3/8 port, and LB mounting. The SAI replacement also features an upgraded piston seal for longer life.
Force is equal both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. The air port is G3/8, the rod is 25 mm with an M20x1.5 thread, and speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID80X350SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAID80X350SLB replacement — usually within 7-8 hours.