This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X100S, 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-SID40X100S
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X100S
- 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-SID40X100S
The AirTAC B04-SID40X100S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Because both faces use the rod-side area, push and pull force are equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The bore is 40 mm, piston rod is Ø16 mm, and the air port is G1/4. The leading "B04-" prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID40X100S, mechanically identical to it in every physical spec.
This SID model is discontinued and end-of-life. The direct replacement is the SAID40X100S, retaining the same ISO 15552 mounting interface, bore, stroke, force, G1/4 port, and adjustable 27 mm cushion. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. A double-rod design prevents rod rotation and lets the back rod carry a sensor cam.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X100S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X100S |
| Bore size | Ø40 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID40X100S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The B04-SAID40X100S 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-SID40X100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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-SID40X100S Is Used
Excavator Linkage Actuation
Drives synchronized auxiliary links on heavy-equipment attachments, using the equal both ways force to push and pull loads with identical power in both directions.
Loader Boom Synchronization
Uses the dual-rod anti-rotation feature to keep construction-machinery boom components aligned during repetitive extension and retraction cycles on the job site.
Crane Outrigger Positioning
Employs the back rod to carry a sensor cam for precise end-of-stroke feedback, ensuring outriggers are safely locked into position before lifting operations.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X100S with the B04-SAID40X100S
To replace the discontinued B04-SID40X100S, specify the direct replacement SAID40X100S, which reuses the exact ISO 15552 mounting interface (Basic, FA, LB, TC) without frame changes. Size both ways by checking neighbor bores against the equal both ways force requirement. Choose a double-rod cylinder when you need anti-rotation stability or need to drive two tools simultaneously. The -S suffix means a magnet is present for legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). For stroke lengths >=300 mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X100S
- ✓ 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-SID40X100S FAQ
Yes, the B04-SID40X100S is discontinued. The direct replacement is the SAID40X100S. The "B04-" prefix only marks it as the construction-machinery dedicated variant of the base SID40X100S, so the SAID40X100S matches it exactly on ISO 15552 interface, 40 mm bore, 100 mm stroke, G1/4 port, and force.
It features a G1/4 air port and delivers force equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. Note that a plain cylinder does not hold its load on air loss; the air cushion only decelerates near stroke end. For a held load, use an external rod lock or the SAIL/BSAI lock variant.
Related AirTAC SAI Cylinders
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