This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X25, 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-SID63X25
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X25 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X25, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X25
- 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-SID63X25
The AirTAC B04-SID63X25 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID63X25, mechanically identical to it with a 63mm bore, 25mm stroke, G3/8 port, and M16x1.5 rod thread. This legacy model is discontinued and directly replaced by the SAID63X25.
The direct replacement SAID63X25 retains the exact ISO 15552 mounting interface, bore, stroke, and equal-both-ways force, while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Because both faces use the rod-side area, the rear rod can drive a second tool or carry a sensor cam without force loss. Note this non-magnetic SKU cannot take a switch, and the air cushion only decelerates; it will not hold a load on air loss.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X25 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X25 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X25 |
| Bore size | Ø63 mm |
| Stroke | 25 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-SAID63X25 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-SAID63X25 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-SID63X25
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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-SID63X25 Is Used
Excavator Linkage Actuation
Provides equal push/pull force for synchronized positioning of heavy-equipment covers or access panels on construction machinery, utilizing the dual-rod anti-rotation benefit.
Concrete Batch Gate
Drives a double-sided material diverter gate where the rear rod simultaneously operates a mechanical indicator, ensuring consistent force in both directions.
Crusher Tool Feed
Advances and retracts a wear-plate tooling head on a rock crusher with matched force, relying on the 63mm bore's 1402 N @0.5 MPa output for reliable cycling.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X25 with the B04-SAID63X25
To replace the discontinued B04-SID63X25, specify the direct replacement SAID63X25, which preserves the G3/8 port, M16x1.5 thread, 30mm adjustable cushion, and ISO 15552 mounting options (Basic, FA, LB, TC, FTC, TCM1, TCM2) without mechanical changes. A double-rod design is correct when you need equal force both ways, anti-rotation stability, or a back rod to drive a second mechanism. If 1402 N @0.5 MPa is insufficient, step up to the 80mm bore (2268 N); if excessive, step down to the 50mm bore (825 N). This SKU lacks the -S magnet and cannot support sensing. For stroke lengths of 300mm or more, verify side-load limits to prevent guide wear. Because this is a non-locking cylinder, use an external rod lock or pilot-operated check valve for held loads, or specify the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X25
- ✓ 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-SID63X25 FAQ
Yes, the B04-SID63X25 is discontinued. The direct replacement is the SAID63X25. The B04- prefix simply denotes the construction-machinery dedicated variant of the base SID63X25. The SAID63X25 shares the exact ISO 15552 interface, 63mm bore, 25mm stroke, G3/8 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The bore dictates a G3/8 air port and an M16x1.5 rod thread. Remember that the air cushion only decelerates near stroke end; it does not hold the load on air loss, so an external rod lock is required for holding.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X25
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID63X25 replacement — usually within 7-8 hours.