This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X800S, 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-SID40X800S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800S 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-SAID40X800S, 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-SAID40X800S
- 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-SID40X800S
The AirTAC B04-SID40X800S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID40X800S; it is mechanically identical, retaining the 40mm bore, G1/4 port, and M12x1.25 rod thread. This legacy model is discontinued and is fully replaced by the SAID40X800S, which adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
Because both faces use the rod-side area, force is equal both ways: 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. The back rod can carry a sensor cam or drive a second tool simultaneously. The built-in magnet (-S) supports legacy CS1-B/DS1-B switches.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X800S |
| 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-SAID40X800S 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-SAID40X800S 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-SID40X800S
| 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-SID40X800S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery covers or gates requiring equal push/pull force and anti-rotation stability under harsh jobsite conditions.
Heavy Equipment Material Transfer
Uses the rear rod to mount a sensor cam on a construction-machinery assembly line, confirming part ejection while the front rod pushes components.
Synchronized Tool Driving
Simultaneously operates two mechanisms from one piston, ideal for compact machinery stations where equal both-ways force is critical.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X800S with the B04-SAID40X800S
To replace the discontinued B04-SID40X800S, specify the SAID40X800S direct: it matches the 40mm bore, 800mm stroke, G1/4 port, and ISO 15552 mounting interface (Basic, FA, LB, TC). When sizing both ways, verify the equal 528N force at 0.5MPa is sufficient, or step up to a 50mm bore if more thrust is needed. A double rod is right when you need anti-rotation stability or a cam for sensors. The -S magnet enables position detection. For the 800mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X800S
- ✓ 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-SID40X800S FAQ
Yes, the B04-SID40X800S is discontinued. The direct replacement is the SAID40X800S. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the base SID40X800S. The SAID replacement shares the same ISO 15552 mount, G1/4 port, and stroke, but adds an upgraded piston seal.
Force is equal both ways at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. The air port is G1/4, speed is 30-800mm/s, and it has a 27mm adjustable cushion. The cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID40X800S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID40X800S replacement — usually within 7-8 hours.