This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X125, 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-SID63X125
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X125
- 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-SID63X125
The B04-SID63X125 is a double-acting double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the base SID63X125. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 1402 N @0.5 MPa. This model is discontinued; the direct replacement is the SAID63X125, which reuses the same ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread. The SAI upgrade also features a two Y-shaped one-way piston seal for low start-up pressure and long life.
A double-rod design provides anti-rotation stability and allows the back rod to drive a second tool or sensor cam simultaneously. Note this non-magnetic SKU cannot take a sensor switch. A plain cylinder does not hold loads on air loss; the 30 mm adjustable cushions only decelerate 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-SID63X125 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X125 |
| Bore size | Ø63 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID63X125 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The B04-SAID63X125 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-SID63X125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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-SID63X125 Is Used
Excavator Linkage Control
Provides equal push and pull force for synchronized positioning of heavy-equipment covers or linkage arms where return force must match extension.
Loader Attachment Shift
The double-rod anti-rotation property keeps the attachment carriage aligned without twisting during side-load shifts on construction sites.
Crusher Feed Gate
Drives a heavy feed gate on a crushing rig where the rear rod simultaneously operates a mechanical limit cam for the system.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125 with the B04-SAID63X125
To replace the discontinued B04-SID63X125, swap directly to the SAID63X125 without changing your ISO 15552 mounts. Size both ways by verifying the equal push/pull force of 1402 N @0.5 MPa is sufficient; if not, step up to the 80 mm bore or down to the 50 mm bore. A double-rod cylinder is right when you need equal force both directions or anti-rotation stability. Mount using FA, LB, or TC brackets. This SKU lacks the -S magnet, so no sensors can be fitted. For strokes of 300 mm or longer, carefully manage side-load alignment to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X125
- ✓ 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-SID63X125 FAQ
Yes, the B04-SID63X125 (construction-machinery dedicated variant of SID63X125) is discontinued. The direct replacement is the SAID63X125. It shares the same ISO 15552 interface, 63 mm bore, 125 mm stroke, G3/8 port, and equal-both-ways force, while adding an upgraded piston seal.
Force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. It features a 20 mm rod, M16x1.5 rod thread, G3/8 air port, and 30 mm adjustable cushions. Speed is 30-800 mm/s. It has no magnet (-S omitted) so it cannot use sensors.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X125
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID63X125 replacement — usually within 7-8 hours.