This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X75, 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-SID80X75
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X75
- 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-SID80X75
The AirTAC B04-SID80X75 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the standard SID80X75. 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 bore dictates a G3/8 port, a Ø25 rod with an M20x1.5 thread, and 36 mm adjustable air cushions at each end. This SID model is discontinued and end-of-life; the direct replacement is the SAID80X75, retaining the same ISO 15552 mounting interface, bore, stroke, and port.
The double-rod architecture prevents piston rotation and allows the rear rod to carry a sensor cam or drive a second tool simultaneously. The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this non-magnetic SKU cannot accept a switch, and a plain cylinder will not hold a load on air loss—the cushion only decelerates near stroke end.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X75 |
| Bore size | Ø80 mm |
| Stroke | 75 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-SAID80X75 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-SAID80X75 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-SID80X75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×75 | 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-SID80X75 Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment where equal push and pull force is required to handle structural linkage without rotational play.
Crusher Feed Control
Regulates infeed gates on construction-site material processors, using the rear rod extension to mechanically mirror position for secondary safety interlocks.
Paver Screed Positioning
Aligns screed extensions on road paving machinery, leveraging the anti-rotation properties of the double-rod design to maintain precise grading angles under vibration.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75 with the B04-SAID80X75
To replace the discontinued B04-SID80X75, specify the SAID80X75; it is a direct swap retaining the ISO 15552 mounting interface, 80 mm bore, 75 mm stroke, G3/8 port, and equal both-ways force. When sizing both ways, verify your load against the 2268 N @0.5 MPa baseline, stepping up to a 100 mm bore if higher force is needed or down to a 63 mm bore if lower force suffices. A double rod is the right choice when you need anti-rotation stability or must drive two tools from one piston. Mounting options include Basic, FA, LB, and TC brackets. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For stroke lengths of 300 mm or greater, carefully verify side-load limits to prevent guide bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X75
- ✓ 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-SID80X75 FAQ
Yes, the B04-SID80X75 is discontinued. The direct replacement is the SAID80X75. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID80X75, and the SAID80X75 matches its ISO 15552 interface, bore, stroke, G3/8 port, and force exactly.
Force is equal both ways at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The bore sets the port at G3/8. Note that the air cushion only decelerates the piston; it does not hold the load on air loss, so use an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X75
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X75 replacement — usually within 7-8 hours.