This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X500, 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-SID40X500
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 500mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X500
- 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-SID40X500
The AirTAC B04-SID40X500 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways (528 N at 0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SID40X500 with a 40 mm bore, 500 mm stroke, and G1/4 port. This SID model is discontinued; the direct replacement is the SAID40X500, which reuses the exact ISO 15552 mounting interface and adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Because both faces use the rod-side area, the force is equal both ways at 528 N, 739 N, and 950 N across 0.5, 0.7, and 0.9 MPa. The rear rod can also drive a second tool simultaneously. Note that this SKU lacks a magnet (-S) and cannot take a magnetic switch; a plain cylinder will not hold a load on air loss, as the cushion only decelerates near stroke end.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X500 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X500 |
| Bore size | Ø40 mm |
| Stroke | 500 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-SAID40X500 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-SAID40X500 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-SID40X500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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-SID40X500 Is Used
Excavator Linkage Actuation
Uses the equal both ways force and double-rod anti-rotation properties to drive synchronized positioning arms on heavy construction machinery without rotational drift.
Crusher Feed Diversion
Simultaneously drives two opposing guide gates from one piston, accurately routing aggregate material on construction site conveyors with matched push and pull thrust.
Loader Attachment Shift
Provides stable lateral movement for heavy-equipment attachments using the dual-rod design to resist side-load twisting during rough-terrain operations.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X500 with the B04-SAID40X500
To replace the discontinued B04-SID40X500, select the SAID40X500, which matches the 40 mm bore, 500 mm stroke, G1/4 port, M12x1.25 rod thread, and 27 mm cushion exactly. Size both ways by verifying the equal force requirement against neighbouring bores: the 32 mm bore yields 345 N at 0.5 MPa, while the 50 mm bore yields 825 N, whereas this 40 mm bore provides 528 N equally in both directions. A double rod is right when you need anti-rotation stability or want to drive two tools from one piston. Existing FA, LB, or TC ISO 15552 mounts can be reused. For the 500 mm stroke, use external guides to prevent rod bending under side loads. This non-magnetic SKU cannot support sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X500
- ✓ 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-SID40X500 FAQ
Yes, the B04-SID40X500 is discontinued. The direct replacement is the SAID40X500. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the base SID40X500. The SAID40X500 matches the ISO 15552 mounting interface, 40 mm bore, 500 mm stroke, G1/4 port, and force, while adding an upgraded piston seal.
It features a G1/4 port and generates force equal both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. Because it is a double-rod cylinder, it never quotes a larger single-rod push value.
Related AirTAC SAI Cylinders
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