This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X900S, 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-SID63X900S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X900S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X900S
- 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-SID63X900S
The AirTAC B04-SID63X900S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID63X900S, sharing identical mechanical specifications. Because a rod exits both ends on a single piston, both faces use the rod-side area, making push and pull force equal (1402 N @0.5 MPa). This model is discontinued and superseded by the direct replacement SAID63X900S, which retains the G3/8 port, M16x1.5 thread, and 30 mm cushions.
The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The built-in magnet (-S) supports legacy CS1-B/DS1-B switches, while the SAI family uses current switches. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X900S |
| Bore size | Ø63 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID63X900S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The B04-SAID63X900S 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-SID63X900S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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-SID63X900S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment with equal push and pull force, leveraging the anti-rotation stability of the double-rod design for precise machinery control.
Loader Attachment Sync
Synchronizes two opposing attachments from a single piston, using the G3/8 port and robust ISO 15552 mounting to withstand harsh construction environments.
Crane Boom Extension
Provides stable linear movement for heavy-duty boom positioning where equal force both ways is critical, utilizing the 900 mm stroke for extended reach operations.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900S with the B04-SAID63X900S
To replace the discontinued B04-SID63X900S, select the SAID63X900S, which offers a direct ISO 15552 interface match without changing your mounting hardware. When sizing both ways, verify the equal both ways force (1402 N @0.5 MPa, 1962 N @0.7 MPa, 2523 N @0.9 MPa) meets your load, or step to neighbouring bores (80mm or 50mm) if a higher or lower capacity is required. A double rod is right when you need anti-rotation stability or must drive two tools simultaneously. Reuse FA, LB, or TC mounts directly. Ensure the -S magnet is specified if sensor feedback is needed. Because the 900 mm stroke exceeds 300 mm, incorporate external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X900S
- ✓ 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-SID63X900S FAQ
Yes, the B04-SID63X900S is discontinued. The direct replacement is the SAID63X900S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID63X900S; mechanically, it is identical. The SAID replacement shares the same ISO 15552 interface, bore, stroke, G3/8 port, and mounting.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The air port size is G3/8. The cylinder operates at 0.15-1.0 MPa with a speed range of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X900S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID63X900S replacement — usually within 7-8 hours.