This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X450, 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X450
- 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450
The AirTAC B04-SID80X450 is a discontinued double-rod ISO 15552 cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID80X450, mechanically identical in every spec. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The direct replacement is the SAID80X450, sharing the same 80mm bore, 450mm stroke, G3/8 port, and M20x1.5 thread.
The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This non-magnetic SKU cannot take a sensor switch. Note that air cushions only decelerate near stroke end; use an external rod lock or SAIL/BSAI variant for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X450 |
| Bore size | Ø80 mm |
| Stroke | 450 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 B04-SAID80X450 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 B04-SAID80X450 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal push/pull force and anti-rotation are critical for stable construction machinery operation.
Crane Load Positioning
Moves synchronized gantry components on building sites, utilizing the G3/8 port and robust ISO 15552 interface for reliable pneumatic shifting.
Concrete Pump Guide
Aligns heavy machinery sections using the double-rod design to carry a back-rod cam, maintaining precise positioning without twist.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 with the B04-SAID80X450
To replace the discontinued B04-SID80X450, use the direct replacement SAID80X450, which reuses the exact ISO 15552 mounting interface (Basic, FA, LB, TC) and maintains the equal both-ways force. Size both ways by checking neighbor bores (63mm or 100mm) if you need to adjust the 2268 N @0.5 MPa baseline. A double rod is right when you need anti-rotation, to drive two tools, or to mount a sensor cam on the back rod. As this is a non-magnetic SKU (no -S suffix), it cannot take a magnetic switch. For the 450mm stroke, add external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X450
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X450 FAQ
Yes, the B04-SID80X450 (construction-machinery dedicated SID80X450) is discontinued. The direct replacement is the SAID80X450, which matches the 80mm bore, 450mm stroke, G3/8 port, and ISO 15552 mounting. The SAI family also adds SAIL and BSAI lock variants the SI line lacked.
Because it is double-acting double-rod, force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The air port is G3/8, rod thread is M20x1.5, and speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X450
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X450 replacement — usually within 7-8 hours.