This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID40X80, 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-SID40X80
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X80 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID40X80, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAID40X80
- 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-SID40X80
The AirTAC B04-SID40X80 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 528 N (@0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the standard SID40X80 with a 16 mm rod, G1/4 port, and M12x1.25 thread. This SID model is discontinued; the direct replacement is the SAID40X80, which reuses the same ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure.
Because both faces use the rod-side area, force is identical in both directions (739 N @0.7 MPa, 950 N @0.9 MPa). The dual rods prevent rotation and let the back rod carry a sensor cam or drive a second tool. Note this SKU lacks the -S magnet and cannot accept switches; for load-holding without live air, use an external rod lock or the SAIL/BSAI lock variants, as cushions only decelerate.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X80 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X80 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID40X80 |
| Bore size | Ø40 mm |
| Stroke | 80 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-SAID40X80 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-SAID40X80 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-SID40X80
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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-SID40X80 Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery covers or gates where equal push/pull force is required to handle offset dirt loads without binding.
Heavy Equipment Part Ejection
Uses the dual rods to push and pull a fabricated steel part out of a machining fixture on a heavy-equipment assembly line, preventing rotation.
Loader Boom Synchronization
Synchronizes a secondary boom movement on a construction loader, using the back rod to mirror a tool position while handling up to 27 kg vertical lift.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID40X80 with the B04-SAID40X80
To replace the discontinued B04-SID40X80, specify the SAID40X80, inserting an A after the S while dropping the B04- industry prefix. It is a direct swap: identical 40 mm bore, 80 mm stroke, 528 N equal-both-ways force, G1/4 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC). Size both directions by checking neighbouring bores (32 mm or 50 mm) if your application needs more or less than 528 N @0.5 MPa. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. This non-magnetic SKU cannot take sensors; if switching is needed, select an -S magnet model. For strokes over 300 mm, verify side-load bearing limits.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID40X80
- ✓ 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-SID40X80 FAQ
Yes, the B04-SID40X80 is discontinued. The B04- prefix simply denotes the construction-machinery dedicated variant of the base cylinder. The direct replacement is the SAID40X80, which shares the identical ISO 15552 interface, 40 mm bore, 80 mm stroke, G1/4 port, and mounting hardware, but features 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 air port is G1/4, the piston rod is 16 mm with an M12x1.25 thread, and it includes 27 mm adjustable cushions. It operates at 0.15-1.0 MPa with speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID40X80
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID40X80 replacement — usually within 7-8 hours.