This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID100X900S, 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-SID100X900S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X900S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 900mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID100X900S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID100X900S
- 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-SID100X900S
The AirTAC B04-SID100X900S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID100X900S, mechanically identical in every spec. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal at 3681 N @0.5 MPa, 5153 N @0.7 MPa, and 6626 N @0.9 MPa. It features a Ø25 mm piston rod, M20x1.5 rod-end thread, and a G1/2 air port. This legacy SID model is discontinued and the direct replacement is the SAID100X900S.
The SAID replacement shares the same ISO 15552 interface, bore, stroke, and mounting, but uses an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The double-rod design provides anti-rotation stability and allows the back rod to carry a sensor cam for the installed -S magnet (legacy CS1-B/DS1-B switches).
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X900S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X900S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID100X900S |
| Bore size | Ø100 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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-SAID100X900S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAID100X900S 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-SID100X900S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | 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-SID100X900S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment with equal push and pull force, using the back rod to carry a sensor cam for closed-loop positioning.
Crane Extension Guidance
Provides high anti-rotation stability for telescopic or articulating structural members on construction machinery, ensuring smooth linear travel.
Synchronized Tool Carriages
Simultaneously actuates two opposing work tools from a single piston, maintaining perfectly synchronized motion without external mechanical linkages.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID100X900S with the B04-SAID100X900S
To replace the discontinued B04-SID100X900S, use the SAID100X900S direct: it matches the 100 mm bore, 900 mm stroke, G1/2 port, and ISO 15552 mounting footprint (Basic, FA, LB, TC, FTC, TCM1, TCM2). Size both ways by checking neighboring bores (80 mm or 125 mm) if you need to adjust the equal-both-ways force. Choose a double-rod cylinder when you need anti-rotation resistance or must drive two tools simultaneously. The -S suffix confirms the piston magnet is present for switch mounting. Because the stroke is 900 mm, external guides are required to prevent rod bending under side loads. A plain cylinder does not hold loads on air loss; use an external rod lock or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID100X900S
- ✓ 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-SID100X900S FAQ
Yes, the B04-SID100X900S is discontinued. The direct replacement is the SAID100X900S. The B04- prefix simply denotes the construction-machinery dedicated variant of the base SID100X900S, and the SAID replacement matches its ISO 15552 interface, bore, stroke, and G1/2 port exactly, while adding an upgraded piston seal.
Because it is a double-rod cylinder, force is equal both ways: 3681 N @0.5 MPa, 5153 N @0.7 MPa, and 6626 N @0.9 MPa. Operating speed is 30-800 mm/s, pressure range is 0.15-1.0 MPa, and it uses a G1/2 air port with a 36 mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
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