This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X800, 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-SID40X800
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X800
- 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-SID40X800
The AirTAC B04-SID40X800 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, generating equal force in both directions (528 N at 0.5 MPa). The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the SID40X800, mechanically identical to the base model with a 40 mm bore, G1/4 port, and M12x1.25 rod thread. This SKU is discontinued and the direct replacement is the SAID40X800, which reuses the exact ISO 15552 mounting interface, bore, and stroke.
The SAID upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because the second rod acts as an anti-rotation guide and can drive a second tool, double-rod designs excel in heavy-equipment applications. Note this non-magnetic SKU cannot take a sensor switch.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X800 |
| Bore size | Ø40 mm |
| Stroke | 800 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-SAID40X800 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-SAID40X800 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-SID40X800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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-SID40X800 Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on construction machinery where the equal push/pull force prevents linkage binding under heavy soil loads.
Crusher Jam Clearance
Uses the back rod to mechanically push an opposing jaw, ensuring balanced force distribution for clearing rock jams in aggregate equipment.
Paver Flap Control
Provides anti-rotation stability for adjustable screed flaps on road pavers, maintaining precise material flow without torque twist.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800 with the B04-SAID40X800
To replace the discontinued B04-SID40X800, specify the SAID40X800; it matches the 40 mm bore, 800 mm stroke, G1/4 port, and 528 N equal-both-ways force. Size both directions by checking neighboring bores if load margins change, as push and pull forces remain identical. Choose a double-rod cylinder when you need anti-rotation stability or a back rod to carry a sensor cam. Reuse FA, LB, or TC mounts directly. For the 800 mm stroke, add external guides to prevent rod bending under side loads. This SKU lacks the -S magnet, so it cannot support legacy CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X800
- ✓ 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-SID40X800 FAQ
Yes, the B04-SID40X800 is discontinued. The direct replacement is the SAID40X800. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID40X800, so the SAID40X800 matches its 40 mm bore, 800 mm stroke, G1/4 port, and ISO 15552 mounting exactly.
Force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The air port is G1/4. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so for held loads use an external rod lock or SAIL/BSAI variant.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID40X800
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID40X800 replacement — usually within 7-8 hours.