This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X1000S, 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-SID50X1000S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X1000S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X1000S
- 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-SID50X1000S
The AirTAC B04-SID50X1000S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID50X1000S. A piston rod exits both ends, meaning push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50 mm with a G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushions at each end. This legacy model is discontinued and the direct replacement is the SAID50X1000S, which reuses the same ISO 15552 mounting interface, bore, stroke, and porting.
The SAID replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. The double-rod configuration provides inherent anti-rotation properties and allows the back rod to carry a sensor cam for position feedback. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that air cushions only decelerate near stroke end; a plain cylinder cannot hold a load on air loss, so an external rod lock or pilot-operated check valve is required for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X1000S |
| Bore size | Ø50 mm |
| Stroke | 1000 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 B04-SAID50X1000S 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 B04-SAID50X1000S 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-SID50X1000S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1000 | 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-SID50X1000S Is Used
Excavator Boom Control
Uses the equal both-ways force and anti-rotation properties of the double rod to actuate secondary boom links on construction machinery, ensuring stable movement under heavy dirt loads.
Crane Load Positioning
Drives dual-tool alignment arms in heavy lifting equipment where the back rod carries a sensor cam, providing precise feedback for load centering without rotational drift.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000S with the B04-SAID50X1000S
To replace the discontinued B04-SID50X1000S, select the SAID50X1000S, which is a direct solution matching the 50 mm bore, 1000 mm stroke, G1/4 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because force is equal both ways, sizing is straightforward: the 825 N @0.5 MPa output sits between the 32 mm (345 N) and 63 mm (1402 N) bores, so if a higher payload is needed, step up to SAID63X1000S. A double-rod cylinder is the right choice when you need anti-rotation stability or must drive two tools simultaneously from one piston. The -S magnet enables position sensing. With a 1000 mm stroke, external guides are strongly recommended to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X1000S
- ✓ 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-SID50X1000S FAQ
Yes, the B04-SID50X1000S is discontinued. The direct replacement is the SAID50X1000S. The B04- prefix simply marks it as the construction-machinery dedicated variant, so the SAID50X1000S matches it exactly on ISO 15552 mounting, 50 mm bore, 1000 mm stroke, G1/4 port, and force.
As a double-rod cylinder, force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It uses a G1/4 air port, has a 20 mm rod, and operates at speeds of 30-800 mm/s. The maximum standard stroke is 1200 mm.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X1000S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X1000S replacement — usually within 7-8 hours.