This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X175S, 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-SID40X175S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X175S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 175mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X175S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X175S
- 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-SID40X175S
The AirTAC B04-SID40X175S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID40X175S, mechanically identical in every spec. A rod exits both ends on a single piston, meaning both faces use the rod-side area to deliver equal push and pull force of 528 N at 0.5 MPa. It features a 16 mm rod, M12x1.25 rod thread, and G1/4 air ports. This discontinued model is fully replaced by the SAID40X175S.
The SAID40X175S direct replacement retains the exact ISO 15552 mounting interface, bore, stroke, and equal-both-ways force. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The built-in magnet (-S) supports legacy CS1-B/DS1-B switches. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X175S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X175S |
| Bore size | Ø40 mm |
| Stroke | 175 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-SAID40X175S 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-SAID40X175S 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-SID40X175S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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-SID40X175S Is Used
Excavator Linkage Control
Uses the equal both-ways force and anti-rotation stability of the double rod to actuate secondary linkage covers on heavy construction equipment.
Crusher Tool Feed
Drives two opposing tooling heads simultaneously from one cylinder body, ensuring balanced material crushing in construction-machinery attachments.
Slab Alignment Gauge
Employs the rear rod as a mechanical cam for legacy CS1-B/DS1-B sensors to track positioning of heavy-equipment panels without torsional twist.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X175S with the B04-SAID40X175S
To replace the discontinued B04-SID40X175S, specify the SAID40X175S, which provides a direct solution preserving the G1/4 port, M12x1.25 thread, and ISO 15552 mounting dimensions. Size both ways by verifying the 528 N equal force at 0.5 MPa; if higher force is needed, step up to the 50 mm bore (825 N), or drop to the 32 mm bore (345 N) for lighter loads. A double-rod design is right when you need anti-rotation stability, the ability to drive two tools simultaneously, or space for a sensor cam on the back rod. Mounting options include Basic, FA, LB, and TC. The -S suffix ensures a piston magnet for legacy CS1-B/DS1-B switches. For this 175 mm stroke, side-load alignment is generally manageable, but for any stroke over 300 mm, carefully guide the load to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X175S
- ✓ 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-SID40X175S FAQ
Yes, the B04-SID40X175S is discontinued. The direct replacement is the SAID40X175S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID40X175S. The SAID replacement shares the exact ISO 15552 interface, 40 mm bore, 175 mm stroke, G1/4 port, and equal both-ways force.
It delivers equal push and pull force of 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. It operates at 0.15-1.0 MPa with a 1.5 MPa proof pressure, speeds of 30-800 mm/s, and a 27 mm adjustable cushion at each end. The air cushion only decelerates; it will not hold a load on air loss, so an external rod lock or pilot-operated check valve is required for held loads.
Related AirTAC SAI Cylinders
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