This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X75S, 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-SID80X75S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75S 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-SAID80X75S, 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-SAID80X75S
- 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-SID80X75S
The AirTAC B04-SID80X75S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force (2268 N at 0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the standard SID80X75S with a 75 mm stroke, 25 mm rod, and G3/8 port. This SID series is discontinued and is fully replaced by the direct replacement SAID80X75S, which reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure.
Because both faces use the rod-side area, force is identical in both directions (3175 N at 0.7 MPa, 4082 N at 0.9 MPa). The dual-rod design prevents piston rotation and allows the rear rod to carry a sensor cam, while the front rod drives the tool. Note that air cushions only decelerate at stroke end; for load holding without live air, an external rod lock or SAIL/BSAI variant is required.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X75S |
| 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-SAID80X75S 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-SAID80X75S 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-SID80X75S
| 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-SID80X75S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment where equal push/pull force and anti-rotation are critical.
Crusher Feed Control
Regulates material flow in construction-machinery crushers, using the rear rod to mount a sensor cam for position feedback.
Concrete Pump Gate
Handles abrasive concrete diversion gates, relying on the robust double-rod structure to prevent binding under heavy side loads.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X75S with the B04-SAID80X75S
To replace the discontinued B04-SID80X75S, specify the SAID80X75S direct: it matches the 80 mm bore, 75 mm stroke, G3/8 port, M20x1.5 thread, and 36 mm cushion. Size both directions by the equal force (2268 N at 0.5 MPa), checking neighbor bores (63 mm or 100 mm) if your margin allows. A double-rod cylinder is right when you need anti-rotation, a rear sensor cam, or two driven tools. Reuse FA, LB, or TC mounts. The -S magnet fits legacy CS1-B/DS1-B switches. For this 75 mm stroke, side-load is minimal, but for strokes >=300 mm, guide the load externally.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X75S
- ✓ 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-SID80X75S FAQ
Yes, the SID line is discontinued. The direct replacement is the SAID80X75S. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the base SID80X75S. The SAID replacement shares the same ISO 15552 interface, bore, stroke, G3/8 port, and force, but adds an upgraded piston seal.
Because it is a double-rod cylinder, 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 B04-SAID80X75S
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