This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X150, 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-SID40X150
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X150 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X150, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X150
- 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-SID40X150
The AirTAC B04-SID40X150 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID40X150. Because a rod exits both ends on a single piston, the push and pull force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It features a 16 mm rod, M12x1.25 rod thread, G1/4 port, and 27 mm adjustable air cushions at each end. This discontinued model is fully replaced by the SAID40X150, which reuses the exact ISO 15552 mounting interface and adds an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life.
Buyers gain two distinct advantages: the rear rod can carry a sensor cam or drive a second tool simultaneously, and the equal-both-ways design inherently resists rotation for rigid handling. Note this SKU lacks a magnet (-S) and cannot take a magnetic switch. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X150 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X150 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X150 |
| Bore size | Ø40 mm |
| Stroke | 150 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-SAID40X150 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-SAID40X150 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-SID40X150
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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-SID40X150 Is Used
Excavator Linkage
Equal-both-ways force drives synchronized actuation links on heavy equipment, resisting rotation under offset loads.
Loader Tool Control
The dual-rod design drives two opposing clamp jaws simultaneously for gripping materials in construction machinery.
Crane Buffer Stop
Adjustable 27 mm cushions decelerate moving crane components at stroke end, while the G1/4 port handles high flow.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X150 with the B04-SAID40X150
To replace the discontinued B04-SID40X150, specify the SAID40X150 direct: it matches the 40 mm bore, 150 mm stroke, G1/4 port, and ISO 15552 mounting footprint (Basic, FA, LB, TC) without mechanical changes. Size both ways by checking equal force at neighbouring bores; the 32 mm bore yields 345 N @0.5 MPa, while the 50 mm bore yields 825 N @0.5 MPa. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. For this 150 mm stroke, side-load alignment is manageable, but for strokes >=300 mm, ensure guide alignment to prevent rod binding. Because this non-magnetic SKU cannot support sensors, select an -S magnet variant if switch positioning is required.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X150
- ✓ 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-SID40X150 FAQ
Yes, the B04-SID40X150 (construction-machinery dedicated SID40X150) is discontinued. The direct replacement is the SAID40X150. It shares the identical ISO 15552 interface, 40 mm bore, 150 mm stroke, G1/4 port, and mounting, but adds an upgraded piston seal.
As a double-rod cylinder, force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The bore is 40 mm with a G1/4 air port, a 16 mm rod, M12x1.25 thread, and 27 mm cushions.
Related AirTAC SAI Cylinders
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