This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X600S, 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-SID40X600S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X600S
- 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-SID40X600S
The AirTAC B04-SID40X600S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as a construction-machinery dedicated variant of the base SID40X600S, mechanically identical to it. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal both ways (528 N @0.5 MPa). The bore 40 mm design features a 16 mm rod, M12x1.25 thread, 27 mm adjustable air cushions, and a G1/4 port.
This discontinued model is fully replaced by the direct replacement SAID40X600S, which reuses the exact ISO 15552 mounting interface, bore, stroke, and porting. The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. Double-rod benefits include anti-rotation and using the back rod to carry a sensor cam.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X600S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X600S |
| Bore size | Ø40 mm |
| Stroke | 600 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-SAID40X600S 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-SAID40X600S 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-SID40X600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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-SID40X600S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery covers or gates with equal push and pull force, using the double-rod geometry to prevent rod rotation during heavy-equipment operation.
Crusher Feed Diversion
Pushes aggregate chutes from both ends on crushing lines. The back rod carries a sensor cam to confirm gate position in dusty construction-machinery environments.
Concrete Pump Routing
Shifts concrete flow valves symmetrically. The G1/4 port and 27 mm cushions handle rapid cycling, while the ISO 15552 interface allows standard mounting reuse.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X600S with the B04-SAID40X600S
To replace the discontinued B04-SID40X600S, specify the direct replacement SAID40X600S, which matches the 40 mm bore, 600 mm stroke, G1/4 port, and ISO 15552 mounting footprint (Basic, FA, LB, TC). Because force is equal both ways, size both directions by the 528 N @0.5 MPa rating; if more force is needed, step up to the 50 mm bore. A double-rod cylinder is right when you need anti-rotation, equal push/pull, or a back rod to drive a second tool. The -S suffix means the piston magnet is present for legacy CS1-B/DS1-B switches. For the 600 mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X600S
- ✓ 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-SID40X600S FAQ
Yes, the B04-SID40X600S is discontinued. The direct replacement is the SAID40X600S. The B04- prefix only marks it as construction-machinery dedicated; mechanically it is identical to SID40X600S. The SAID replacement shares the same ISO 15552 interface, 40 mm bore, 600 mm stroke, G1/4 port, and mounting, but adds an upgraded piston seal.
Force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It operates at 0.15-1.0 MPa with a speed range of 30-800 mm/s. The bore 40 mm cylinder has a 16 mm rod, M12x1.25 thread, and 27 mm adjustable air cushions at each end. Air cushions only decelerate near stroke end; they do not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID40X600S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID40X600S replacement — usually within 7-8 hours.